From 4c071b3a979796a6473a77d89dde431d5f5c61d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=91=D1=80=D0=B0=D0=BD=D0=B8=D0=BC=D0=B8=D1=80=20=D0=9A?=
 =?UTF-8?q?=D0=B0=D1=80=D0=B0=D1=9F=D0=B8=D1=9B?=
 <branimirkaradzic@gmail.com>
Date: Fri, 22 Mar 2019 13:17:07 -0700
Subject: [PATCH] Updated spirv-tools.

---
 .../include/generated/build-version.inc       |   2 +-
 .../include/spirv-tools/instrument.hpp        |  32 +-
 .../include/spirv-tools/optimizer.hpp         |  22 +-
 .../source/opt/inst_bindless_check_pass.cpp   | 388 ++++++++-----
 .../source/opt/inst_bindless_check_pass.h     | 115 +++-
 .../source/opt/instrument_pass.cpp            | 177 ++++--
 .../spirv-tools/source/opt/instrument_pass.h  |  39 +-
 3rdparty/spirv-tools/source/opt/optimizer.cpp |   9 +-
 .../spirv-tools/source/reduce/CMakeLists.txt  |   4 +
 .../spirv-tools/source/reduce/reducer.cpp     |  19 +-
 3rdparty/spirv-tools/source/reduce/reducer.h  |   6 +-
 .../remove_block_reduction_opportunity.cpp    |  56 ++
 .../remove_block_reduction_opportunity.h      |  46 ++
 ...ove_block_reduction_opportunity_finder.cpp |  96 ++++
 ...emove_block_reduction_opportunity_finder.h |  55 ++
 .../spirv-tools/source/val/validate_image.cpp |  11 +-
 .../source/val/validation_state.cpp           |  10 +-
 .../spirv-tools/source/val/validation_state.h |   9 +-
 .../test/opt/inst_bindless_check_test.cpp     | 524 +++++++++++++++---
 .../spirv-tools/test/reduce/CMakeLists.txt    |   1 +
 .../spirv-tools/test/reduce/reducer_test.cpp  |  18 +-
 .../test/reduce/remove_block_test.cpp         | 358 ++++++++++++
 .../validation_during_reduction_test.cpp      | 201 ++++++-
 .../spirv-tools/test/val/val_image_test.cpp   |  32 ++
 3rdparty/spirv-tools/tools/reduce/reduce.cpp  |  29 +-
 25 files changed, 1885 insertions(+), 374 deletions(-)
 create mode 100644 3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity.cpp
 create mode 100644 3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity.h
 create mode 100644 3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity_finder.cpp
 create mode 100644 3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity_finder.h
 create mode 100644 3rdparty/spirv-tools/test/reduce/remove_block_test.cpp

diff --git a/3rdparty/spirv-tools/include/generated/build-version.inc b/3rdparty/spirv-tools/include/generated/build-version.inc
index 87c3414e9..273ee54ba 100644
--- a/3rdparty/spirv-tools/include/generated/build-version.inc
+++ b/3rdparty/spirv-tools/include/generated/build-version.inc
@@ -1 +1 @@
-"v2019.2", "SPIRV-Tools v2019.2 45a64efab9d50ebcf9694a3297acc3223502610d"
+"v2019.2", "SPIRV-Tools v2019.2 027e592038bb74c2ffe6b07f9cc4e2ab1b3fbb84"
diff --git a/3rdparty/spirv-tools/include/spirv-tools/instrument.hpp b/3rdparty/spirv-tools/include/spirv-tools/instrument.hpp
index 01c7c6d1e..9711b9297 100644
--- a/3rdparty/spirv-tools/include/spirv-tools/instrument.hpp
+++ b/3rdparty/spirv-tools/include/spirv-tools/instrument.hpp
@@ -110,6 +110,16 @@ static const int kInstValidationOutError = kInstStageOutCnt;
 // about the validation error.
 //
 // A bindless bounds error will output the index and the bound.
+static const int kInstBindlessBoundsOutDescIndex = kInstStageOutCnt + 1;
+static const int kInstBindlessBoundsOutDescBound = kInstStageOutCnt + 2;
+static const int kInstBindlessBoundsOutCnt = kInstStageOutCnt + 3;
+
+// A bindless uninitialized error will output the index.
+static const int kInstBindlessUninitOutDescIndex = kInstStageOutCnt + 1;
+static const int kInstBindlessUninitOutUnused = kInstStageOutCnt + 2;
+static const int kInstBindlessUninitOutCnt = kInstStageOutCnt + 3;
+
+// DEPRECATED
 static const int kInstBindlessOutDescIndex = kInstStageOutCnt + 1;
 static const int kInstBindlessOutDescBound = kInstStageOutCnt + 2;
 static const int kInstBindlessOutCnt = kInstStageOutCnt + 3;
@@ -121,6 +131,7 @@ static const int kInstMaxOutCnt = kInstStageOutCnt + 3;
 //
 // These are the possible validation error codes.
 static const int kInstErrorBindlessBounds = 0;
+static const int kInstErrorBindlessUninit = 1;
 
 // Direct Input Buffer Offsets
 //
@@ -141,11 +152,8 @@ static const int kDebugInputDataOffset = 0;
 // and possibly other future validations.
 static const int kDebugOutputBindingStream = 0;
 
-// The binding for the input buffer for InstBindlessCheckPass. The input
-// buffer needs only be created if the shaders being validated contain a
-// descriptor array of runtime size, and validation of runtime size descriptor
-// arrays have been enabled at the time of the bindless validation pass
-// creation.
+// The binding for the input buffer read by InstBindlessCheckPass and
+// possibly other future validations.
 static const int kDebugInputBindingBindless = 1;
 
 // Bindless Validation Input Buffer Format
@@ -153,11 +161,19 @@ static const int kDebugInputBindingBindless = 1;
 // An input buffer for bindless validation consists of a single array of
 // unsigned integers we will call Data[]. This array is formatted as follows.
 //
-// At the beginning of the array is a single uint reserved for future use.
+// At offset kDebugInputBindlessInitOffset in Data[] is a single uint which
+// gives an offset to the start of the bindless initialization data. More
+// specifically, if the following value is zero, we know that the descriptor at
+// (set = s, binding = b, index = i) is not initialized:
+// Data[ i + Data[ b + Data[ s + Data[ kDebugInputBindlessInitOffset ] ] ] ]
+static const int kDebugInputBindlessInitOffset = 0;
+
+// DEPRECATED
 static const int kDebugInputBindlessOffsetReserved = 0;
 
-// Following the reserved uint is some number of uints such that the following
-// is true: the number of descriptors at (set=s, binding=b) is:
+// At offset kDebugInputBindlessOffsetLengths is some number of uints which
+// provide the bindless length data. More specifically, the number of
+// descriptors at (set=s, binding=b) is:
 // Data[ Data[ s + kDebugInputBindlessOffsetLengths ] + b ]
 static const int kDebugInputBindlessOffsetLengths = 1;
 
diff --git a/3rdparty/spirv-tools/include/spirv-tools/optimizer.hpp b/3rdparty/spirv-tools/include/spirv-tools/optimizer.hpp
index bbc70041a..08ef5e67a 100644
--- a/3rdparty/spirv-tools/include/spirv-tools/optimizer.hpp
+++ b/3rdparty/spirv-tools/include/spirv-tools/optimizer.hpp
@@ -704,10 +704,14 @@ Optimizer::PassToken CreateCombineAccessChainsPass();
 
 // Create a pass to instrument bindless descriptor checking
 // This pass instruments all bindless references to check that descriptor
-// array indices are inbounds. If the reference is invalid, a record is
-// written to the debug output buffer (if space allows) and a null value is
-// returned. This pass is designed to support bindless validation in the Vulkan
-// validation layers.
+// array indices are inbounds, and if the descriptor indexing extension is
+// enabled, that the descriptor has been initialized. If the reference is
+// invalid, a record is written to the debug output buffer (if space allows)
+// and a null value is returned. This pass is designed to support bindless
+// validation in the Vulkan validation layers.
+//
+// TODO(greg-lunarg): Add support for buffer references. Currently only does
+// checking for image references.
 //
 // Dead code elimination should be run after this pass as the original,
 // potentially invalid code is not removed and could cause undefined behavior,
@@ -723,12 +727,12 @@ Optimizer::PassToken CreateCombineAccessChainsPass();
 // The instrumentation will read and write buffers in debug
 // descriptor set |desc_set|. It will write |shader_id| in each output record
 // to identify the shader module which generated the record.
-// |runtime_array_enable| controls instrumentation of runtime arrays which
-// require input buffer support.
-//
-// TODO(greg-lunarg): Add support for vk_ext_descriptor_indexing.
+// |input_length_enable| controls instrumentation of runtime descriptor array
+// references, and |input_init_enable| controls instrumentation of descriptor
+// initialization checking, both of which require input buffer support.
 Optimizer::PassToken CreateInstBindlessCheckPass(
-    uint32_t desc_set, uint32_t shader_id, bool runtime_array_enable = false);
+    uint32_t desc_set, uint32_t shader_id, bool input_length_enable = false,
+    bool input_init_enable = false);
 
 // Create a pass to upgrade to the VulkanKHR memory model.
 // This pass upgrades the Logical GLSL450 memory model to Logical VulkanKHR.
diff --git a/3rdparty/spirv-tools/source/opt/inst_bindless_check_pass.cpp b/3rdparty/spirv-tools/source/opt/inst_bindless_check_pass.cpp
index d9f221f91..47c81347c 100644
--- a/3rdparty/spirv-tools/source/opt/inst_bindless_check_pass.cpp
+++ b/3rdparty/spirv-tools/source/opt/inst_bindless_check_pass.cpp
@@ -40,21 +40,74 @@ uint32_t InstBindlessCheckPass::GenDebugReadLength(
   uint32_t desc_set_idx =
       var2desc_set_[var_id] + kDebugInputBindlessOffsetLengths;
   uint32_t desc_set_idx_id = builder->GetUintConstantId(desc_set_idx);
-  uint32_t desc_set_offset_id = GenDebugDirectRead(desc_set_idx_id, builder);
-  Instruction* binding_idx_inst =
-      builder->AddBinaryOp(GetUintId(), SpvOpIAdd, desc_set_offset_id,
-                           builder->GetUintConstantId(var2binding_[var_id]));
-  return GenDebugDirectRead(binding_idx_inst->result_id(), builder);
+  uint32_t binding_idx_id = builder->GetUintConstantId(var2binding_[var_id]);
+  return GenDebugDirectRead({desc_set_idx_id, binding_idx_id}, builder);
 }
 
-void InstBindlessCheckPass::GenBindlessCheckCode(
-    BasicBlock::iterator ref_inst_itr,
-    UptrVectorIterator<BasicBlock> ref_block_itr, uint32_t instruction_idx,
-    uint32_t stage_idx, std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
-  // Look for reference through bindless descriptor. If not, return.
-  std::unique_ptr<BasicBlock> new_blk_ptr;
-  uint32_t image_id;
-  switch (ref_inst_itr->opcode()) {
+uint32_t InstBindlessCheckPass::GenDebugReadInit(uint32_t var_id,
+                                                 uint32_t desc_idx_id,
+                                                 InstructionBuilder* builder) {
+  uint32_t desc_set_base_id =
+      builder->GetUintConstantId(kDebugInputBindlessInitOffset);
+  uint32_t desc_set_idx_id = builder->GetUintConstantId(var2desc_set_[var_id]);
+  uint32_t binding_idx_id = builder->GetUintConstantId(var2binding_[var_id]);
+  uint32_t u_desc_idx_id = GenUintCastCode(desc_idx_id, builder);
+  return GenDebugDirectRead(
+      {desc_set_base_id, desc_set_idx_id, binding_idx_id, u_desc_idx_id},
+      builder);
+}
+
+uint32_t InstBindlessCheckPass::CloneOriginalReference(
+    ref_analysis* ref, InstructionBuilder* builder) {
+  // Clone descriptor load
+  Instruction* load_inst = get_def_use_mgr()->GetDef(ref->load_id);
+  Instruction* new_load_inst =
+      builder->AddLoad(load_inst->type_id(),
+                       load_inst->GetSingleWordInOperand(kSpvLoadPtrIdInIdx));
+  uid2offset_[new_load_inst->unique_id()] = uid2offset_[load_inst->unique_id()];
+  uint32_t new_load_id = new_load_inst->result_id();
+  get_decoration_mgr()->CloneDecorations(load_inst->result_id(), new_load_id);
+  uint32_t new_image_id = new_load_id;
+  // Clone Image/SampledImage with new load, if needed
+  if (ref->image_id != 0) {
+    Instruction* image_inst = get_def_use_mgr()->GetDef(ref->image_id);
+    if (image_inst->opcode() == SpvOp::SpvOpSampledImage) {
+      Instruction* new_image_inst = builder->AddBinaryOp(
+          image_inst->type_id(), SpvOpSampledImage, new_load_id,
+          image_inst->GetSingleWordInOperand(kSpvSampledImageSamplerIdInIdx));
+      uid2offset_[new_image_inst->unique_id()] =
+          uid2offset_[image_inst->unique_id()];
+      new_image_id = new_image_inst->result_id();
+    } else {
+      assert(image_inst->opcode() == SpvOp::SpvOpImage && "expecting OpImage");
+      Instruction* new_image_inst =
+          builder->AddUnaryOp(image_inst->type_id(), SpvOpImage, new_load_id);
+      uid2offset_[new_image_inst->unique_id()] =
+          uid2offset_[image_inst->unique_id()];
+      new_image_id = new_image_inst->result_id();
+    }
+    get_decoration_mgr()->CloneDecorations(ref->image_id, new_image_id);
+  }
+  // Clone original reference using new image code
+  std::unique_ptr<Instruction> new_ref_inst(ref->ref_inst->Clone(context()));
+  uint32_t ref_result_id = ref->ref_inst->result_id();
+  uint32_t new_ref_id = 0;
+  if (ref_result_id != 0) {
+    new_ref_id = TakeNextId();
+    new_ref_inst->SetResultId(new_ref_id);
+  }
+  new_ref_inst->SetInOperand(kSpvImageSampleImageIdInIdx, {new_image_id});
+  // Register new reference and add to new block
+  Instruction* added_inst = builder->AddInstruction(std::move(new_ref_inst));
+  uid2offset_[added_inst->unique_id()] =
+      uid2offset_[ref->ref_inst->unique_id()];
+  if (new_ref_id != 0)
+    get_decoration_mgr()->CloneDecorations(ref_result_id, new_ref_id);
+  return new_ref_id;
+}
+
+uint32_t InstBindlessCheckPass::GetDescriptorValueId(Instruction* inst) {
+  switch (inst->opcode()) {
     case SpvOp::SpvOpImageSampleImplicitLod:
     case SpvOp::SpvOpImageSampleExplicitLod:
     case SpvOp::SpvOpImageSampleDrefImplicitLod:
@@ -87,162 +140,205 @@ void InstBindlessCheckPass::GenBindlessCheckCode(
     case SpvOp::SpvOpImageSparseFetch:
     case SpvOp::SpvOpImageSparseRead:
     case SpvOp::SpvOpImageWrite:
-      image_id =
-          ref_inst_itr->GetSingleWordInOperand(kSpvImageSampleImageIdInIdx);
-      break;
+      return inst->GetSingleWordInOperand(kSpvImageSampleImageIdInIdx);
     default:
-      return;
+      break;
   }
-  Instruction* image_inst = get_def_use_mgr()->GetDef(image_id);
-  uint32_t load_id;
-  Instruction* load_inst;
+  return 0;
+}
+
+bool InstBindlessCheckPass::AnalyzeDescriptorReference(Instruction* ref_inst,
+                                                       ref_analysis* ref) {
+  ref->image_id = GetDescriptorValueId(ref_inst);
+  if (ref->image_id == 0) return false;
+  Instruction* image_inst = get_def_use_mgr()->GetDef(ref->image_id);
   if (image_inst->opcode() == SpvOp::SpvOpSampledImage) {
-    load_id = image_inst->GetSingleWordInOperand(kSpvSampledImageImageIdInIdx);
-    load_inst = get_def_use_mgr()->GetDef(load_id);
+    ref->load_id =
+        image_inst->GetSingleWordInOperand(kSpvSampledImageImageIdInIdx);
   } else if (image_inst->opcode() == SpvOp::SpvOpImage) {
-    load_id = image_inst->GetSingleWordInOperand(kSpvImageSampledImageIdInIdx);
-    load_inst = get_def_use_mgr()->GetDef(load_id);
+    ref->load_id =
+        image_inst->GetSingleWordInOperand(kSpvImageSampledImageIdInIdx);
   } else {
-    load_id = image_id;
-    load_inst = image_inst;
-    image_id = 0;
+    ref->load_id = ref->image_id;
+    ref->image_id = 0;
   }
+  Instruction* load_inst = get_def_use_mgr()->GetDef(ref->load_id);
   if (load_inst->opcode() != SpvOp::SpvOpLoad) {
-    // TODO(greg-lunarg): Handle additional possibilities
-    return;
+    // TODO(greg-lunarg): Handle additional possibilities?
+    return false;
   }
-  uint32_t ptr_id = load_inst->GetSingleWordInOperand(kSpvLoadPtrIdInIdx);
-  Instruction* ptr_inst = get_def_use_mgr()->GetDef(ptr_id);
-  if (ptr_inst->opcode() != SpvOp::SpvOpAccessChain) return;
-  if (ptr_inst->NumInOperands() != 2) {
-    assert(false && "unexpected bindless index number");
-    return;
+  ref->ptr_id = load_inst->GetSingleWordInOperand(kSpvLoadPtrIdInIdx);
+  Instruction* ptr_inst = get_def_use_mgr()->GetDef(ref->ptr_id);
+  if (ptr_inst->opcode() == SpvOp::SpvOpVariable) {
+    ref->index_id = 0;
+    ref->var_id = ref->ptr_id;
+  } else if (ptr_inst->opcode() == SpvOp::SpvOpAccessChain) {
+    if (ptr_inst->NumInOperands() != 2) {
+      assert(false && "unexpected bindless index number");
+      return false;
+    }
+    ref->index_id =
+        ptr_inst->GetSingleWordInOperand(kSpvAccessChainIndex0IdInIdx);
+    ref->var_id = ptr_inst->GetSingleWordInOperand(kSpvAccessChainBaseIdInIdx);
+    Instruction* var_inst = get_def_use_mgr()->GetDef(ref->var_id);
+    if (var_inst->opcode() != SpvOpVariable) {
+      assert(false && "unexpected bindless base");
+      return false;
+    }
+  } else {
+    // TODO(greg-lunarg): Handle additional possibilities?
+    return false;
   }
-  uint32_t index_id =
-      ptr_inst->GetSingleWordInOperand(kSpvAccessChainIndex0IdInIdx);
-  ptr_id = ptr_inst->GetSingleWordInOperand(kSpvAccessChainBaseIdInIdx);
-  ptr_inst = get_def_use_mgr()->GetDef(ptr_id);
-  if (ptr_inst->opcode() != SpvOpVariable) {
-    assert(false && "unexpected bindless base");
-    return;
-  }
-  uint32_t var_type_id = ptr_inst->type_id();
-  Instruction* var_type_inst = get_def_use_mgr()->GetDef(var_type_id);
-  uint32_t ptr_type_id =
-      var_type_inst->GetSingleWordInOperand(kSpvTypePointerTypeIdInIdx);
-  Instruction* ptr_type_inst = get_def_use_mgr()->GetDef(ptr_type_id);
-  // If index and bound both compile-time constants and index < bound,
-  // return without changing
-  uint32_t length_id = 0;
-  if (ptr_type_inst->opcode() == SpvOpTypeArray) {
-    length_id =
-        ptr_type_inst->GetSingleWordInOperand(kSpvTypeArrayLengthIdInIdx);
-    Instruction* index_inst = get_def_use_mgr()->GetDef(index_id);
-    Instruction* length_inst = get_def_use_mgr()->GetDef(length_id);
-    if (index_inst->opcode() == SpvOpConstant &&
-        length_inst->opcode() == SpvOpConstant &&
-        index_inst->GetSingleWordInOperand(kSpvConstantValueInIdx) <
-            length_inst->GetSingleWordInOperand(kSpvConstantValueInIdx))
-      return;
-  } else if (!runtime_array_enabled_ ||
-             ptr_type_inst->opcode() != SpvOpTypeRuntimeArray) {
-    return;
-  }
-  // Generate full runtime bounds test code with true branch
-  // being full reference and false branch being debug output and zero
-  // for the referenced value.
-  MovePreludeCode(ref_inst_itr, ref_block_itr, &new_blk_ptr);
+  ref->ref_inst = ref_inst;
+  return true;
+}
+
+void InstBindlessCheckPass::GenCheckCode(
+    uint32_t check_id, uint32_t error_id, uint32_t length_id,
+    uint32_t stage_idx, ref_analysis* ref,
+    std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
+  BasicBlock* back_blk_ptr = &*new_blocks->back();
   InstructionBuilder builder(
-      context(), &*new_blk_ptr,
+      context(), back_blk_ptr,
       IRContext::kAnalysisDefUse | IRContext::kAnalysisInstrToBlockMapping);
-  uint32_t error_id = builder.GetUintConstantId(kInstErrorBindlessBounds);
-  // If length id not yet set, descriptor array is runtime size so
-  // generate load of length from stage's debug input buffer.
-  if (length_id == 0) {
-    assert(ptr_type_inst->opcode() == SpvOpTypeRuntimeArray &&
-           "unexpected bindless type");
-    length_id = GenDebugReadLength(ptr_id, &builder);
-  }
-  Instruction* ult_inst =
-      builder.AddBinaryOp(GetBoolId(), SpvOpULessThan, index_id, length_id);
+  // Gen conditional branch on check_id. Valid branch generates original
+  // reference. Invalid generates debug output and zero result (if needed).
   uint32_t merge_blk_id = TakeNextId();
   uint32_t valid_blk_id = TakeNextId();
   uint32_t invalid_blk_id = TakeNextId();
   std::unique_ptr<Instruction> merge_label(NewLabel(merge_blk_id));
   std::unique_ptr<Instruction> valid_label(NewLabel(valid_blk_id));
   std::unique_ptr<Instruction> invalid_label(NewLabel(invalid_blk_id));
-  (void)builder.AddConditionalBranch(ult_inst->result_id(), valid_blk_id,
-                                     invalid_blk_id, merge_blk_id,
-                                     SpvSelectionControlMaskNone);
-  // Close selection block and gen valid reference block
-  new_blocks->push_back(std::move(new_blk_ptr));
-  new_blk_ptr.reset(new BasicBlock(std::move(valid_label)));
+  (void)builder.AddConditionalBranch(check_id, valid_blk_id, invalid_blk_id,
+                                     merge_blk_id, SpvSelectionControlMaskNone);
+  // Gen valid bounds branch
+  std::unique_ptr<BasicBlock> new_blk_ptr(
+      new BasicBlock(std::move(valid_label)));
   builder.SetInsertPoint(&*new_blk_ptr);
-  // Clone descriptor load
-  Instruction* new_load_inst =
-      builder.AddLoad(load_inst->type_id(),
-                      load_inst->GetSingleWordInOperand(kSpvLoadPtrIdInIdx));
-  uint32_t new_load_id = new_load_inst->result_id();
-  get_decoration_mgr()->CloneDecorations(load_inst->result_id(), new_load_id);
-  uint32_t new_image_id = new_load_id;
-  // Clone Image/SampledImage with new load, if needed
-  if (image_id != 0) {
-    if (image_inst->opcode() == SpvOp::SpvOpSampledImage) {
-      Instruction* new_image_inst = builder.AddBinaryOp(
-          image_inst->type_id(), SpvOpSampledImage, new_load_id,
-          image_inst->GetSingleWordInOperand(kSpvSampledImageSamplerIdInIdx));
-      new_image_id = new_image_inst->result_id();
-    } else {
-      assert(image_inst->opcode() == SpvOp::SpvOpImage && "expecting OpImage");
-      Instruction* new_image_inst =
-          builder.AddUnaryOp(image_inst->type_id(), SpvOpImage, new_load_id);
-      new_image_id = new_image_inst->result_id();
-    }
-    get_decoration_mgr()->CloneDecorations(image_id, new_image_id);
-  }
-  // Clone original reference using new image code
-  std::unique_ptr<Instruction> new_ref_inst(ref_inst_itr->Clone(context()));
-  uint32_t ref_result_id = ref_inst_itr->result_id();
-  uint32_t new_ref_id = 0;
-  if (ref_result_id != 0) {
-    new_ref_id = TakeNextId();
-    new_ref_inst->SetResultId(new_ref_id);
-  }
-  new_ref_inst->SetInOperand(kSpvImageSampleImageIdInIdx, {new_image_id});
-  // Register new reference and add to new block
-  builder.AddInstruction(std::move(new_ref_inst));
-  if (new_ref_id != 0)
-    get_decoration_mgr()->CloneDecorations(ref_result_id, new_ref_id);
-  // Close valid block and gen invalid block
+  uint32_t new_ref_id = CloneOriginalReference(ref, &builder);
   (void)builder.AddBranch(merge_blk_id);
   new_blocks->push_back(std::move(new_blk_ptr));
+  // Gen invalid block
   new_blk_ptr.reset(new BasicBlock(std::move(invalid_label)));
   builder.SetInsertPoint(&*new_blk_ptr);
-  uint32_t u_index_id = GenUintCastCode(index_id, &builder);
-  GenDebugStreamWrite(instruction_idx, stage_idx,
+  uint32_t u_index_id = GenUintCastCode(ref->index_id, &builder);
+  GenDebugStreamWrite(uid2offset_[ref->ref_inst->unique_id()], stage_idx,
                       {error_id, u_index_id, length_id}, &builder);
   // Remember last invalid block id
   uint32_t last_invalid_blk_id = new_blk_ptr->GetLabelInst()->result_id();
   // Gen zero for invalid  reference
-  uint32_t ref_type_id = ref_inst_itr->type_id();
-  // Close invalid block and gen merge block
+  uint32_t ref_type_id = ref->ref_inst->type_id();
   (void)builder.AddBranch(merge_blk_id);
   new_blocks->push_back(std::move(new_blk_ptr));
+  // Gen merge block
   new_blk_ptr.reset(new BasicBlock(std::move(merge_label)));
   builder.SetInsertPoint(&*new_blk_ptr);
   // Gen phi of new reference and zero, if necessary, and replace the
   // result id of the original reference with that of the Phi. Kill original
-  // reference and move in remainder of original block.
+  // reference.
   if (new_ref_id != 0) {
     Instruction* phi_inst = builder.AddPhi(
         ref_type_id, {new_ref_id, valid_blk_id, builder.GetNullId(ref_type_id),
                       last_invalid_blk_id});
-    context()->ReplaceAllUsesWith(ref_result_id, phi_inst->result_id());
+    context()->ReplaceAllUsesWith(ref->ref_inst->result_id(),
+                                  phi_inst->result_id());
   }
-  context()->KillInst(&*ref_inst_itr);
-  MovePostludeCode(ref_block_itr, &new_blk_ptr);
-  // Add remainder/merge block to new blocks
   new_blocks->push_back(std::move(new_blk_ptr));
+  context()->KillInst(ref->ref_inst);
+}
+
+void InstBindlessCheckPass::GenBoundsCheckCode(
+    BasicBlock::iterator ref_inst_itr,
+    UptrVectorIterator<BasicBlock> ref_block_itr, uint32_t stage_idx,
+    std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
+  // Look for reference through indexed descriptor. If found, analyze and
+  // save components. If not, return.
+  ref_analysis ref;
+  if (!AnalyzeDescriptorReference(&*ref_inst_itr, &ref)) return;
+  Instruction* ptr_inst = get_def_use_mgr()->GetDef(ref.ptr_id);
+  if (ptr_inst->opcode() != SpvOp::SpvOpAccessChain) return;
+  // If index and bound both compile-time constants and index < bound,
+  // return without changing
+  Instruction* var_inst = get_def_use_mgr()->GetDef(ref.var_id);
+  uint32_t var_type_id = var_inst->type_id();
+  Instruction* var_type_inst = get_def_use_mgr()->GetDef(var_type_id);
+  uint32_t desc_type_id =
+      var_type_inst->GetSingleWordInOperand(kSpvTypePointerTypeIdInIdx);
+  Instruction* desc_type_inst = get_def_use_mgr()->GetDef(desc_type_id);
+  uint32_t length_id = 0;
+  if (desc_type_inst->opcode() == SpvOpTypeArray) {
+    length_id =
+        desc_type_inst->GetSingleWordInOperand(kSpvTypeArrayLengthIdInIdx);
+    Instruction* index_inst = get_def_use_mgr()->GetDef(ref.index_id);
+    Instruction* length_inst = get_def_use_mgr()->GetDef(length_id);
+    if (index_inst->opcode() == SpvOpConstant &&
+        length_inst->opcode() == SpvOpConstant &&
+        index_inst->GetSingleWordInOperand(kSpvConstantValueInIdx) <
+            length_inst->GetSingleWordInOperand(kSpvConstantValueInIdx))
+      return;
+  } else if (!input_length_enabled_ ||
+             desc_type_inst->opcode() != SpvOpTypeRuntimeArray) {
+    return;
+  }
+  // Move original block's preceding instructions into first new block
+  std::unique_ptr<BasicBlock> new_blk_ptr;
+  MovePreludeCode(ref_inst_itr, ref_block_itr, &new_blk_ptr);
+  InstructionBuilder builder(
+      context(), &*new_blk_ptr,
+      IRContext::kAnalysisDefUse | IRContext::kAnalysisInstrToBlockMapping);
+  new_blocks->push_back(std::move(new_blk_ptr));
+  uint32_t error_id = builder.GetUintConstantId(kInstErrorBindlessBounds);
+  // If length id not yet set, descriptor array is runtime size so
+  // generate load of length from stage's debug input buffer.
+  if (length_id == 0) {
+    assert(desc_type_inst->opcode() == SpvOpTypeRuntimeArray &&
+           "unexpected bindless type");
+    length_id = GenDebugReadLength(ref.var_id, &builder);
+  }
+  // Generate full runtime bounds test code with true branch
+  // being full reference and false branch being debug output and zero
+  // for the referenced value.
+  Instruction* ult_inst =
+      builder.AddBinaryOp(GetBoolId(), SpvOpULessThan, ref.index_id, length_id);
+  GenCheckCode(ult_inst->result_id(), error_id, length_id, stage_idx, &ref,
+               new_blocks);
+  // Move original block's remaining code into remainder/merge block and add
+  // to new blocks
+  BasicBlock* back_blk_ptr = &*new_blocks->back();
+  MovePostludeCode(ref_block_itr, back_blk_ptr);
+}
+
+void InstBindlessCheckPass::GenInitCheckCode(
+    BasicBlock::iterator ref_inst_itr,
+    UptrVectorIterator<BasicBlock> ref_block_itr, uint32_t stage_idx,
+    std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
+  // Look for reference through descriptor. If not, return.
+  ref_analysis ref;
+  if (!AnalyzeDescriptorReference(&*ref_inst_itr, &ref)) return;
+  // Move original block's preceding instructions into first new block
+  std::unique_ptr<BasicBlock> new_blk_ptr;
+  MovePreludeCode(ref_inst_itr, ref_block_itr, &new_blk_ptr);
+  InstructionBuilder builder(
+      context(), &*new_blk_ptr,
+      IRContext::kAnalysisDefUse | IRContext::kAnalysisInstrToBlockMapping);
+  new_blocks->push_back(std::move(new_blk_ptr));
+  // Read initialization status from debug input buffer. If index id not yet
+  // set, binding is single descriptor, so set index to constant 0.
+  uint32_t zero_id = builder.GetUintConstantId(0u);
+  if (ref.index_id == 0) ref.index_id = zero_id;
+  uint32_t init_id = GenDebugReadInit(ref.var_id, ref.index_id, &builder);
+  // Generate full runtime non-zero init test code with true branch
+  // being full reference and false branch being debug output and zero
+  // for the referenced value.
+  Instruction* uneq_inst =
+      builder.AddBinaryOp(GetBoolId(), SpvOpINotEqual, init_id, zero_id);
+  uint32_t error_id = builder.GetUintConstantId(kInstErrorBindlessUninit);
+  GenCheckCode(uneq_inst->result_id(), error_id, zero_id, stage_idx, &ref,
+               new_blocks);
+  // Move original block's remaining code into remainder/merge block and add
+  // to new blocks
+  BasicBlock* back_blk_ptr = &*new_blocks->back();
+  MovePostludeCode(ref_block_itr, back_blk_ptr);
 }
 
 void InstBindlessCheckPass::InitializeInstBindlessCheck() {
@@ -258,9 +354,10 @@ void InstBindlessCheckPass::InitializeInstBindlessCheck() {
       break;
     }
   }
-  // If descriptor indexing extension and runtime array support enabled,
-  // create variable to descriptor set mapping.
-  if (ext_descriptor_indexing_defined_ && runtime_array_enabled_)
+  // If descriptor indexing extension and runtime array length support enabled,
+  // create variable mappings. Length support is always enabled if descriptor
+  // init check is enabled.
+  if (ext_descriptor_indexing_defined_ && input_length_enabled_)
     for (auto& anno : get_module()->annotations())
       if (anno.opcode() == SpvOpDecorate) {
         if (anno.GetSingleWordInOperand(1u) == SpvDecorationDescriptorSet)
@@ -273,18 +370,27 @@ void InstBindlessCheckPass::InitializeInstBindlessCheck() {
 }
 
 Pass::Status InstBindlessCheckPass::ProcessImpl() {
-  // Perform instrumentation on each entry point function in module
+  // Perform bindless bounds check on each entry point function in module
   InstProcessFunction pfn =
       [this](BasicBlock::iterator ref_inst_itr,
-             UptrVectorIterator<BasicBlock> ref_block_itr,
-             uint32_t instruction_idx, uint32_t stage_idx,
+             UptrVectorIterator<BasicBlock> ref_block_itr, uint32_t stage_idx,
              std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
-        return GenBindlessCheckCode(ref_inst_itr, ref_block_itr,
-                                    instruction_idx, stage_idx, new_blocks);
+        return GenBoundsCheckCode(ref_inst_itr, ref_block_itr, stage_idx,
+                                  new_blocks);
       };
   bool modified = InstProcessEntryPointCallTree(pfn);
-  // This pass does not update inst->blk info
-  context()->InvalidateAnalyses(IRContext::kAnalysisInstrToBlockMapping);
+  if (ext_descriptor_indexing_defined_ && input_init_enabled_) {
+    // Perform descriptor initialization check on each entry point function in
+    // module
+    pfn = [this](BasicBlock::iterator ref_inst_itr,
+                 UptrVectorIterator<BasicBlock> ref_block_itr,
+                 uint32_t stage_idx,
+                 std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
+      return GenInitCheckCode(ref_inst_itr, ref_block_itr, stage_idx,
+                              new_blocks);
+    };
+    modified |= InstProcessEntryPointCallTree(pfn);
+  }
   return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange;
 }
 
diff --git a/3rdparty/spirv-tools/source/opt/inst_bindless_check_pass.h b/3rdparty/spirv-tools/source/opt/inst_bindless_check_pass.h
index be782cef4..79c34f1fc 100644
--- a/3rdparty/spirv-tools/source/opt/inst_bindless_check_pass.h
+++ b/3rdparty/spirv-tools/source/opt/inst_bindless_check_pass.h
@@ -31,12 +31,14 @@ class InstBindlessCheckPass : public InstrumentPass {
   // For test harness only
   InstBindlessCheckPass()
       : InstrumentPass(7, 23, kInstValidationIdBindless),
-        runtime_array_enabled_(true) {}
+        input_length_enabled_(true),
+        input_init_enabled_(true) {}
   // For all other interfaces
   InstBindlessCheckPass(uint32_t desc_set, uint32_t shader_id,
-                        bool runtime_array_enable)
+                        bool input_length_enable, bool input_init_enable)
       : InstrumentPass(desc_set, shader_id, kInstValidationIdBindless),
-        runtime_array_enabled_(runtime_array_enable) {}
+        input_length_enabled_(input_length_enable),
+        input_init_enabled_(input_init_enable) {}
 
   ~InstBindlessCheckPass() override = default;
 
@@ -46,32 +48,40 @@ class InstBindlessCheckPass : public InstrumentPass {
   const char* name() const override { return "inst-bindless-check-pass"; }
 
  private:
-  // Generate instructions into |builder| to read length of runtime descriptor
-  // array |var_id| from debug input buffer and return id of value.
-  uint32_t GenDebugReadLength(uint32_t var_id, InstructionBuilder* builder);
-
-  // Initialize state for instrumenting bindless checking
-  void InitializeInstBindlessCheck();
-
-  // This function does bindless checking instrumentation on a single
-  // instruction. It is designed to be passed to
+  // These functions do bindless checking instrumentation on a single
+  // instruction which references through a descriptor (ie references into an
+  // image or buffer). Refer to Vulkan API for further information on
+  // descriptors. GenBoundsCheckCode checks that an index into a descriptor
+  // array (array of images or buffers) is in-bounds. GenInitCheckCode
+  // checks that the referenced descriptor has been initialized, if the
+  // SPV_EXT_descriptor_indexing extension is enabled.
+  //
+  // TODO(greg-lunarg): Add support for buffers. Currently only does
+  // checking of references of images.
+  //
+  // The functions are designed to be passed to
   // InstrumentPass::InstProcessEntryPointCallTree(), which applies the
   // function to each instruction in a module and replaces the instruction
   // if warranted.
   //
   // If |ref_inst_itr| is a bindless reference, return in |new_blocks| the
   // result of instrumenting it with validation code within its block at
-  // |ref_block_itr|. Specifically, generate code to check that the index
-  // into the descriptor array is in-bounds. If the check passes, execute
-  // the remainder of the reference, otherwise write a record to the debug
+  // |ref_block_itr|.  The validation code first executes a check for the
+  // specific condition called for. If the check passes, it executes
+  // the remainder of the reference, otherwise writes a record to the debug
   // output buffer stream including |function_idx, instruction_idx, stage_idx|
-  // and replace the reference with the null value of the original type. The
+  // and replaces the reference with the null value of the original type. The
   // block at |ref_block_itr| can just be replaced with the blocks in
   // |new_blocks|, which will contain at least two blocks. The last block will
   // comprise all instructions following |ref_inst_itr|,
   // preceded by a phi instruction.
   //
-  // This instrumentation pass utilizes GenDebugStreamWrite() to write its
+  // These instrumentation functions utilize GenDebugDirectRead() to read data
+  // from the debug input buffer, specifically the lengths of variable length
+  // descriptor arrays, and the initialization status of each descriptor.
+  // The format of the debug input buffer is documented in instrument.hpp.
+  //
+  // These instrumentation functions utilize GenDebugStreamWrite() to write its
   // error records. The validation-specific part of the error record will
   // have the format:
   //
@@ -84,18 +94,77 @@ class InstBindlessCheckPass : public InstrumentPass {
   //
   // The Descriptor Array Size is the size of the descriptor array which was
   // indexed.
-  void GenBindlessCheckCode(
-      BasicBlock::iterator ref_inst_itr,
-      UptrVectorIterator<BasicBlock> ref_block_itr, uint32_t instruction_idx,
-      uint32_t stage_idx, std::vector<std::unique_ptr<BasicBlock>>* new_blocks);
+  void GenBoundsCheckCode(BasicBlock::iterator ref_inst_itr,
+                          UptrVectorIterator<BasicBlock> ref_block_itr,
+                          uint32_t stage_idx,
+                          std::vector<std::unique_ptr<BasicBlock>>* new_blocks);
 
+  void GenInitCheckCode(BasicBlock::iterator ref_inst_itr,
+                        UptrVectorIterator<BasicBlock> ref_block_itr,
+                        uint32_t stage_idx,
+                        std::vector<std::unique_ptr<BasicBlock>>* new_blocks);
+
+  // Generate instructions into |builder| to read length of runtime descriptor
+  // array |var_id| from debug input buffer and return id of value.
+  uint32_t GenDebugReadLength(uint32_t var_id, InstructionBuilder* builder);
+
+  // Generate instructions into |builder| to read initialization status of
+  // descriptor array |image_id| at |index_id| from debug input buffer and
+  // return id of value.
+  uint32_t GenDebugReadInit(uint32_t image_id, uint32_t index_id,
+                            InstructionBuilder* builder);
+
+  // Analysis data for descriptor reference components, generated by
+  // AnalyzeDescriptorReference. It is necessary and sufficient for further
+  // analysis and regeneration of the reference.
+  typedef struct ref_analysis {
+    uint32_t image_id;
+    uint32_t load_id;
+    uint32_t ptr_id;
+    uint32_t var_id;
+    uint32_t index_id;
+    Instruction* ref_inst;
+  } ref_analysis;
+
+  // Clone original original reference encapsulated by |ref| into |builder|.
+  // This may generate more than one instruction if neccessary.
+  uint32_t CloneOriginalReference(ref_analysis* ref,
+                                  InstructionBuilder* builder);
+
+  // If |inst| references through a descriptor, (ie references into an image
+  // or buffer), return the id of the value it references. Else return 0.
+  uint32_t GetDescriptorValueId(Instruction* inst);
+
+  // Analyze descriptor reference |ref_inst| and save components into |ref|.
+  // Return true if |ref_inst| is a descriptor reference, false otherwise.
+  bool AnalyzeDescriptorReference(Instruction* ref_inst, ref_analysis* ref);
+
+  // Generate instrumentation code for generic test result |check_id|, starting
+  // with |builder| of block |new_blk_ptr|, adding new blocks to |new_blocks|.
+  // Generate conditional branch to a valid or invalid branch. Generate valid
+  // block which does original reference |ref|. Generate invalid block which
+  // writes debug error output utilizing |ref|, |error_id|, |length_id| and
+  // |stage_idx|. Generate merge block for valid and invalid branches. Kill
+  // original reference.
+  void GenCheckCode(uint32_t check_id, uint32_t error_id, uint32_t length_id,
+                    uint32_t stage_idx, ref_analysis* ref,
+                    std::vector<std::unique_ptr<BasicBlock>>* new_blocks);
+
+  // Initialize state for instrumenting bindless checking
+  void InitializeInstBindlessCheck();
+
+  // Apply GenBoundsCheckCode to every instruction in module. Then apply
+  // GenInitCheckCode to every instruction in module.
   Pass::Status ProcessImpl();
 
   // True if VK_EXT_descriptor_indexing is defined
   bool ext_descriptor_indexing_defined_;
 
-  // Enable instrumentation of runtime arrays
-  bool runtime_array_enabled_;
+  // Enable instrumentation of runtime array length checking
+  bool input_length_enabled_;
+
+  // Enable instrumentation of descriptor initialization checking
+  bool input_init_enabled_;
 
   // Mapping from variable to descriptor set
   std::unordered_map<uint32_t, uint32_t> var2desc_set_;
diff --git a/3rdparty/spirv-tools/source/opt/instrument_pass.cpp b/3rdparty/spirv-tools/source/opt/instrument_pass.cpp
index 5c26b5c73..668c98036 100644
--- a/3rdparty/spirv-tools/source/opt/instrument_pass.cpp
+++ b/3rdparty/spirv-tools/source/opt/instrument_pass.cpp
@@ -57,8 +57,7 @@ void InstrumentPass::MovePreludeCode(
 }
 
 void InstrumentPass::MovePostludeCode(
-    UptrVectorIterator<BasicBlock> ref_block_itr,
-    std::unique_ptr<BasicBlock>* new_blk_ptr) {
+    UptrVectorIterator<BasicBlock> ref_block_itr, BasicBlock* new_blk_ptr) {
   // new_blk_ptr->reset(new BasicBlock(NewLabel(ref_block_itr->id())));
   // Move contents of original ref block.
   for (auto cii = ref_block_itr->begin(); cii != ref_block_itr->end();
@@ -77,7 +76,7 @@ void InstrumentPass::MovePostludeCode(
         same_block_post_[rid] = rid;
       }
     }
-    (*new_blk_ptr)->AddInstruction(std::move(mv_inst));
+    new_blk_ptr->AddInstruction(std::move(mv_inst));
   }
 }
 
@@ -222,16 +221,14 @@ void InstrumentPass::GenDebugStreamWrite(
   (void)builder->AddNaryOp(GetVoidId(), SpvOpFunctionCall, args);
 }
 
-uint32_t InstrumentPass::GenDebugDirectRead(uint32_t idx_id,
-                                            InstructionBuilder* builder) {
-  uint32_t input_buf_id = GetInputBufferId();
-  uint32_t buf_uint_ptr_id = GetBufferUintPtrId();
-  Instruction* ibuf_ac_inst = builder->AddTernaryOp(
-      buf_uint_ptr_id, SpvOpAccessChain, input_buf_id,
-      builder->GetUintConstantId(kDebugInputDataOffset), idx_id);
-  Instruction* load_inst =
-      builder->AddUnaryOp(GetUintId(), SpvOpLoad, ibuf_ac_inst->result_id());
-  return load_inst->result_id();
+uint32_t InstrumentPass::GenDebugDirectRead(
+    const std::vector<uint32_t>& offset_ids, InstructionBuilder* builder) {
+  // Call debug input function. Pass func_idx and offset ids as args.
+  uint32_t off_id_cnt = static_cast<uint32_t>(offset_ids.size());
+  uint32_t input_func_id = GetDirectReadFunctionId(off_id_cnt);
+  std::vector<uint32_t> args = {input_func_id};
+  (void)args.insert(args.end(), offset_ids.begin(), offset_ids.end());
+  return builder->AddNaryOp(GetUintId(), SpvOpFunctionCall, args)->result_id();
 }
 
 bool InstrumentPass::IsSameBlockOp(const Instruction* inst) const {
@@ -242,7 +239,7 @@ void InstrumentPass::CloneSameBlockOps(
     std::unique_ptr<Instruction>* inst,
     std::unordered_map<uint32_t, uint32_t>* same_blk_post,
     std::unordered_map<uint32_t, Instruction*>* same_blk_pre,
-    std::unique_ptr<BasicBlock>* block_ptr) {
+    BasicBlock* block_ptr) {
   (*inst)->ForEachInId(
       [&same_blk_post, &same_blk_pre, &block_ptr, this](uint32_t* iid) {
         const auto map_itr = (*same_blk_post).find(*iid);
@@ -259,7 +256,7 @@ void InstrumentPass::CloneSameBlockOps(
             sb_inst->SetResultId(nid);
             (*same_blk_post)[rid] = nid;
             *iid = nid;
-            (*block_ptr)->AddInstruction(std::move(sb_inst));
+            block_ptr->AddInstruction(std::move(sb_inst));
           }
         } else {
           // Reset same-block op operand.
@@ -604,6 +601,81 @@ uint32_t InstrumentPass::GetStreamWriteFunctionId(uint32_t stage_idx,
   return output_func_id_;
 }
 
+uint32_t InstrumentPass::GetDirectReadFunctionId(uint32_t param_cnt) {
+  uint32_t func_id = param2input_func_id_[param_cnt];
+  if (func_id != 0) return func_id;
+  // Create input function for param_cnt
+  func_id = TakeNextId();
+  analysis::TypeManager* type_mgr = context()->get_type_mgr();
+  std::vector<const analysis::Type*> param_types;
+  for (uint32_t c = 0; c < param_cnt; ++c)
+    param_types.push_back(type_mgr->GetType(GetUintId()));
+  analysis::Function func_ty(type_mgr->GetType(GetUintId()), param_types);
+  analysis::Type* reg_func_ty = type_mgr->GetRegisteredType(&func_ty);
+  std::unique_ptr<Instruction> func_inst(new Instruction(
+      get_module()->context(), SpvOpFunction, GetUintId(), func_id,
+      {{spv_operand_type_t::SPV_OPERAND_TYPE_LITERAL_INTEGER,
+        {SpvFunctionControlMaskNone}},
+       {spv_operand_type_t::SPV_OPERAND_TYPE_ID,
+        {type_mgr->GetTypeInstruction(reg_func_ty)}}}));
+  get_def_use_mgr()->AnalyzeInstDefUse(&*func_inst);
+  std::unique_ptr<Function> input_func =
+      MakeUnique<Function>(std::move(func_inst));
+  // Add parameters
+  std::vector<uint32_t> param_vec;
+  for (uint32_t c = 0; c < param_cnt; ++c) {
+    uint32_t pid = TakeNextId();
+    param_vec.push_back(pid);
+    std::unique_ptr<Instruction> param_inst(new Instruction(
+        get_module()->context(), SpvOpFunctionParameter, GetUintId(), pid, {}));
+    get_def_use_mgr()->AnalyzeInstDefUse(&*param_inst);
+    input_func->AddParameter(std::move(param_inst));
+  }
+  // Create block
+  uint32_t blk_id = TakeNextId();
+  std::unique_ptr<Instruction> blk_label(NewLabel(blk_id));
+  std::unique_ptr<BasicBlock> new_blk_ptr =
+      MakeUnique<BasicBlock>(std::move(blk_label));
+  InstructionBuilder builder(
+      context(), &*new_blk_ptr,
+      IRContext::kAnalysisDefUse | IRContext::kAnalysisInstrToBlockMapping);
+  // For each offset parameter, generate new offset with parameter, adding last
+  // loaded value if it exists, and load value from input buffer at new offset.
+  // Return last loaded value.
+  uint32_t buf_id = GetInputBufferId();
+  uint32_t buf_uint_ptr_id = GetBufferUintPtrId();
+  uint32_t last_value_id = 0;
+  for (uint32_t p = 0; p < param_cnt; ++p) {
+    uint32_t offset_id;
+    if (p == 0) {
+      offset_id = param_vec[0];
+    } else {
+      Instruction* offset_inst = builder.AddBinaryOp(
+          GetUintId(), SpvOpIAdd, last_value_id, param_vec[p]);
+      offset_id = offset_inst->result_id();
+    }
+    Instruction* ac_inst = builder.AddTernaryOp(
+        buf_uint_ptr_id, SpvOpAccessChain, buf_id,
+        builder.GetUintConstantId(kDebugInputDataOffset), offset_id);
+    Instruction* load_inst =
+        builder.AddUnaryOp(GetUintId(), SpvOpLoad, ac_inst->result_id());
+    last_value_id = load_inst->result_id();
+  }
+  (void)builder.AddInstruction(MakeUnique<Instruction>(
+      context(), SpvOpReturnValue, 0, 0,
+      std::initializer_list<Operand>{{SPV_OPERAND_TYPE_ID, {last_value_id}}}));
+  // Close block and function and add function to module
+  new_blk_ptr->SetParent(&*input_func);
+  input_func->AddBasicBlock(std::move(new_blk_ptr));
+  std::unique_ptr<Instruction> func_end_inst(
+      new Instruction(get_module()->context(), SpvOpFunctionEnd, 0, 0, {}));
+  get_def_use_mgr()->AnalyzeInstDefUse(&*func_end_inst);
+  input_func->SetFunctionEnd(std::move(func_end_inst));
+  context()->AddFunction(std::move(input_func));
+  param2input_func_id_[param_cnt] = func_id;
+  return func_id;
+}
+
 bool InstrumentPass::InstrumentFunction(Function* func, uint32_t stage_idx,
                                         InstProcessFunction& pfn) {
   bool modified = false;
@@ -614,23 +686,17 @@ bool InstrumentPass::InstrumentFunction(Function* func, uint32_t stage_idx,
     ++function_idx;
   }
   std::vector<std::unique_ptr<BasicBlock>> new_blks;
-  // Start count after function and param instructions
-  uint32_t instruction_idx = funcIdx2offset_[function_idx] + 1;
-  func->ForEachParam(
-      [&instruction_idx](const Instruction*) { ++instruction_idx; }, true);
   // Using block iterators here because of block erasures and insertions.
   for (auto bi = func->begin(); bi != func->end(); ++bi) {
-    // Count block's label
-    ++instruction_idx;
-    for (auto ii = bi->begin(); ii != bi->end(); ++instruction_idx) {
-      // Bump instruction count if debug instructions
-      instruction_idx += static_cast<uint32_t>(ii->dbg_line_insts().size());
+    for (auto ii = bi->begin(); ii != bi->end();) {
       // Generate instrumentation if warranted
-      pfn(ii, bi, instruction_idx, stage_idx, &new_blks);
+      pfn(ii, bi, stage_idx, &new_blks);
       if (new_blks.size() == 0) {
         ++ii;
         continue;
       }
+      // Add new blocks to label id map
+      for (auto& blk : new_blks) id2block_[blk->id()] = &*blk;
       // If there are new blocks we know there will always be two or
       // more, so update succeeding phis with label of new last block.
       size_t newBlocksSize = new_blks.size();
@@ -660,6 +726,9 @@ bool InstrumentPass::InstProcessCallTreeFromRoots(InstProcessFunction& pfn,
                                                   uint32_t stage_idx) {
   bool modified = false;
   std::unordered_set<uint32_t> done;
+  // Don't process input and output functions
+  for (auto& ifn : param2input_func_id_) done.insert(ifn.second);
+  if (output_func_id_ != 0) done.insert(output_func_id_);
   // Process all functions from roots
   while (!roots->empty()) {
     const uint32_t fi = roots->front();
@@ -735,72 +804,68 @@ void InstrumentPass::InitializeInstrument() {
     }
   }
 
-  // Calculate instruction offset of first function
-  uint32_t pre_func_size = 0;
+  // Remember original instruction offsets
+  uint32_t module_offset = 0;
   Module* module = get_module();
   for (auto& i : context()->capabilities()) {
     (void)i;
-    ++pre_func_size;
+    ++module_offset;
   }
   for (auto& i : module->extensions()) {
     (void)i;
-    ++pre_func_size;
+    ++module_offset;
   }
   for (auto& i : module->ext_inst_imports()) {
     (void)i;
-    ++pre_func_size;
+    ++module_offset;
   }
-  ++pre_func_size;  // memory_model
+  ++module_offset;  // memory_model
   for (auto& i : module->entry_points()) {
     (void)i;
-    ++pre_func_size;
+    ++module_offset;
   }
   for (auto& i : module->execution_modes()) {
     (void)i;
-    ++pre_func_size;
+    ++module_offset;
   }
   for (auto& i : module->debugs1()) {
     (void)i;
-    ++pre_func_size;
+    ++module_offset;
   }
   for (auto& i : module->debugs2()) {
     (void)i;
-    ++pre_func_size;
+    ++module_offset;
   }
   for (auto& i : module->debugs3()) {
     (void)i;
-    ++pre_func_size;
+    ++module_offset;
   }
   for (auto& i : module->annotations()) {
     (void)i;
-    ++pre_func_size;
+    ++module_offset;
   }
   for (auto& i : module->types_values()) {
-    pre_func_size += 1;
-    pre_func_size += static_cast<uint32_t>(i.dbg_line_insts().size());
+    module_offset += 1;
+    module_offset += static_cast<uint32_t>(i.dbg_line_insts().size());
   }
-  funcIdx2offset_[0] = pre_func_size;
 
-  // Set instruction offsets for all other functions.
-  uint32_t func_idx = 1;
-  auto prev_fn = get_module()->begin();
-  auto curr_fn = prev_fn;
-  for (++curr_fn; curr_fn != get_module()->end(); ++curr_fn) {
-    // Count function, end and param instructions
-    uint32_t func_size = 2;
-    prev_fn->ForEachParam([&func_size](const Instruction*) { ++func_size; },
-                          true);
-    for (auto& blk : *prev_fn) {
+  auto curr_fn = get_module()->begin();
+  for (; curr_fn != get_module()->end(); ++curr_fn) {
+    // Count function instruction
+    module_offset += 1;
+    curr_fn->ForEachParam(
+        [&module_offset](const Instruction*) { module_offset += 1; }, true);
+    for (auto& blk : *curr_fn) {
       // Count label
-      func_size += 1;
+      module_offset += 1;
       for (auto& inst : blk) {
-        func_size += 1;
-        func_size += static_cast<uint32_t>(inst.dbg_line_insts().size());
+        module_offset += static_cast<uint32_t>(inst.dbg_line_insts().size());
+        uid2offset_[inst.unique_id()] = module_offset;
+        module_offset += 1;
       }
     }
-    funcIdx2offset_[func_idx] = funcIdx2offset_[func_idx - 1] + func_size;
-    ++prev_fn;
-    ++func_idx;
+    // Count function end instruction
+    module_offset += 1;
   }
 }
 
diff --git a/3rdparty/spirv-tools/source/opt/instrument_pass.h b/3rdparty/spirv-tools/source/opt/instrument_pass.h
index 003e64742..c4b97d638 100644
--- a/3rdparty/spirv-tools/source/opt/instrument_pass.h
+++ b/3rdparty/spirv-tools/source/opt/instrument_pass.h
@@ -65,18 +65,16 @@ class InstrumentPass : public Pass {
   using cbb_ptr = const BasicBlock*;
 
  public:
-  using InstProcessFunction = std::function<void(
-      BasicBlock::iterator, UptrVectorIterator<BasicBlock>, uint32_t, uint32_t,
-      std::vector<std::unique_ptr<BasicBlock>>*)>;
+  using InstProcessFunction =
+      std::function<void(BasicBlock::iterator, UptrVectorIterator<BasicBlock>,
+                         uint32_t, std::vector<std::unique_ptr<BasicBlock>>*)>;
 
   ~InstrumentPass() override = default;
 
   IRContext::Analysis GetPreservedAnalyses() override {
-    return IRContext::kAnalysisDefUse |
-           IRContext::kAnalysisInstrToBlockMapping |
-           IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |
-           IRContext::kAnalysisNameMap | IRContext::kAnalysisBuiltinVarId |
-           IRContext::kAnalysisConstants;
+    return IRContext::kAnalysisDefUse | IRContext::kAnalysisDecorations |
+           IRContext::kAnalysisCombinators | IRContext::kAnalysisNameMap |
+           IRContext::kAnalysisBuiltinVarId | IRContext::kAnalysisConstants;
   }
 
  protected:
@@ -107,7 +105,7 @@ class InstrumentPass : public Pass {
   // Move all code in |ref_block_itr| succeeding the instruction |ref_inst_itr|
   // to be instrumented into block |new_blk_ptr|.
   void MovePostludeCode(UptrVectorIterator<BasicBlock> ref_block_itr,
-                        std::unique_ptr<BasicBlock>* new_blk_ptr);
+                        BasicBlock* new_blk_ptr);
 
   // Generate instructions in |builder| which will atomically fetch and
   // increment the size of the debug output buffer stream of the current
@@ -196,11 +194,15 @@ class InstrumentPass : public Pass {
                            InstructionBuilder* builder);
 
   // Generate in |builder| instructions to read the unsigned integer from the
-  // input buffer at offset |idx_id|. Return the result id.
+  // input buffer specified by the offsets in |offset_ids|. Given offsets
+  // o0, o1, ... oN, and input buffer ibuf, return the id for the value:
+  //
+  // ibuf[...ibuf[ibuf[o0]+o1]...+oN]
   //
   // The binding and the format of the input buffer is determined by each
   // specific validation, which is specified at the creation of the pass.
-  uint32_t GenDebugDirectRead(uint32_t idx_id, InstructionBuilder* builder);
+  uint32_t GenDebugDirectRead(const std::vector<uint32_t>& offset_ids,
+                              InstructionBuilder* builder);
 
   // Generate code to cast |value_id| to unsigned, if needed. Return
   // an id to the unsigned equivalent.
@@ -247,10 +249,14 @@ class InstrumentPass : public Pass {
   uint32_t GetVec4UintId();
 
   // Return id for output function. Define if it doesn't exist with
-  // |val_spec_arg_cnt| validation-specific uint32 arguments.
+  // |val_spec_param_cnt| validation-specific uint32 parameters.
   uint32_t GetStreamWriteFunctionId(uint32_t stage_idx,
                                     uint32_t val_spec_param_cnt);
 
+  // Return id for input function taking |param_cnt| uint32 parameters. Define
+  // if it doesn't exist.
+  uint32_t GetDirectReadFunctionId(uint32_t param_cnt);
+
   // Apply instrumentation function |pfn| to every instruction in |func|.
   // If code is generated for an instruction, replace the instruction's
   // block with the new blocks that are generated. Continue processing at the
@@ -312,7 +318,7 @@ class InstrumentPass : public Pass {
       std::unique_ptr<Instruction>* inst,
       std::unordered_map<uint32_t, uint32_t>* same_blk_post,
       std::unordered_map<uint32_t, Instruction*>* same_blk_pre,
-      std::unique_ptr<BasicBlock>* block_ptr);
+      BasicBlock* block_ptr);
 
   // Update phis in succeeding blocks to point to new last block
   void UpdateSucceedingPhis(
@@ -331,8 +337,8 @@ class InstrumentPass : public Pass {
   // CFG. It has functionality not present in CFG. Consolidate.
   std::unordered_map<uint32_t, BasicBlock*> id2block_;
 
-  // Map from function's position index to the offset of its first instruction
-  std::unordered_map<uint32_t, uint32_t> funcIdx2offset_;
+  // Map from instruction's unique id to offset in original file.
+  std::unordered_map<uint32_t, uint32_t> uid2offset_;
 
   // result id for OpConstantFalse
   uint32_t validation_id_;
@@ -346,6 +352,9 @@ class InstrumentPass : public Pass {
   // id for debug output function
   uint32_t output_func_id_;
 
+  // ids for debug input functions
+  std::unordered_map<uint32_t, uint32_t> param2input_func_id_;
+
   // param count for output function
   uint32_t output_func_param_cnt_;
 
diff --git a/3rdparty/spirv-tools/source/opt/optimizer.cpp b/3rdparty/spirv-tools/source/opt/optimizer.cpp
index 5fb487577..d4499a880 100644
--- a/3rdparty/spirv-tools/source/opt/optimizer.cpp
+++ b/3rdparty/spirv-tools/source/opt/optimizer.cpp
@@ -387,7 +387,7 @@ bool Optimizer::RegisterPassFromFlag(const std::string& flag) {
   } else if (pass_name == "replace-invalid-opcode") {
     RegisterPass(CreateReplaceInvalidOpcodePass());
   } else if (pass_name == "inst-bindless-check") {
-    RegisterPass(CreateInstBindlessCheckPass(7, 23, true));
+    RegisterPass(CreateInstBindlessCheckPass(7, 23, true, true));
     RegisterPass(CreateSimplificationPass());
     RegisterPass(CreateDeadBranchElimPass());
     RegisterPass(CreateBlockMergePass());
@@ -807,10 +807,11 @@ Optimizer::PassToken CreateUpgradeMemoryModelPass() {
 
 Optimizer::PassToken CreateInstBindlessCheckPass(uint32_t desc_set,
                                                  uint32_t shader_id,
-                                                 bool runtime_array_enable) {
+                                                 bool input_length_enable,
+                                                 bool input_init_enable) {
   return MakeUnique<Optimizer::PassToken::Impl>(
-      MakeUnique<opt::InstBindlessCheckPass>(desc_set, shader_id,
-                                             runtime_array_enable));
+      MakeUnique<opt::InstBindlessCheckPass>(
+          desc_set, shader_id, input_length_enable, input_init_enable));
 }
 
 Optimizer::PassToken CreateCodeSinkingPass() {
diff --git a/3rdparty/spirv-tools/source/reduce/CMakeLists.txt b/3rdparty/spirv-tools/source/reduce/CMakeLists.txt
index 1a6ead479..468023122 100644
--- a/3rdparty/spirv-tools/source/reduce/CMakeLists.txt
+++ b/3rdparty/spirv-tools/source/reduce/CMakeLists.txt
@@ -24,6 +24,8 @@ set(SPIRV_TOOLS_REDUCE_SOURCES
         reduction_opportunity_finder.h
         reduction_pass.h
         reduction_util.h
+        remove_block_reduction_opportunity.h
+        remove_block_reduction_opportunity_finder.h
         remove_instruction_reduction_opportunity.h
         remove_function_reduction_opportunity.h
         remove_function_reduction_opportunity_finder.h
@@ -43,6 +45,8 @@ set(SPIRV_TOOLS_REDUCE_SOURCES
         reduction_opportunity.cpp
         reduction_pass.cpp
         reduction_util.cpp
+        remove_block_reduction_opportunity.cpp
+        remove_block_reduction_opportunity_finder.cpp
         remove_function_reduction_opportunity.cpp
         remove_function_reduction_opportunity_finder.cpp
         remove_instruction_reduction_opportunity.cpp
diff --git a/3rdparty/spirv-tools/source/reduce/reducer.cpp b/3rdparty/spirv-tools/source/reduce/reducer.cpp
index aaef3fb43..29d32688c 100644
--- a/3rdparty/spirv-tools/source/reduce/reducer.cpp
+++ b/3rdparty/spirv-tools/source/reduce/reducer.cpp
@@ -53,13 +53,25 @@ void Reducer::SetInterestingnessFunction(
 
 Reducer::ReductionResultStatus Reducer::Run(
     std::vector<uint32_t>&& binary_in, std::vector<uint32_t>* binary_out,
-    spv_const_reducer_options options) const {
-  std::vector<uint32_t> current_binary = binary_in;
+    spv_const_reducer_options options,
+    spv_validator_options validator_options) const {
+  std::vector<uint32_t> current_binary(std::move(binary_in));
+
+  spvtools::SpirvTools tools(impl_->target_env);
+  assert(tools.IsValid() && "Failed to create SPIRV-Tools interface");
 
   // Keeps track of how many reduction attempts have been tried.  Reduction
   // bails out if this reaches a given limit.
   uint32_t reductions_applied = 0;
 
+  // Initial state should be valid.
+  if (!tools.Validate(&current_binary[0], current_binary.size(),
+                      validator_options)) {
+    impl_->consumer(SPV_MSG_INFO, nullptr, {},
+                    "Initial binary is invalid; stopping.");
+    return Reducer::ReductionResultStatus::kInitialStateInvalid;
+  }
+
   // Initial state should be interesting.
   if (!impl_->interestingness_function(current_binary, reductions_applied)) {
     impl_->consumer(SPV_MSG_INFO, nullptr, {},
@@ -106,7 +118,8 @@ Reducer::ReductionResultStatus Reducer::Run(
                      << reductions_applied << ".";
         impl_->consumer(SPV_MSG_INFO, nullptr, {},
                         (stringstream.str().c_str()));
-        if (!spvtools::SpirvTools(impl_->target_env).Validate(maybe_result)) {
+        if (!tools.Validate(&maybe_result[0], maybe_result.size(),
+                            validator_options)) {
           // The reduction step went wrong and an invalid binary was produced.
           // By design, this shouldn't happen; this is a safeguard to stop an
           // invalid binary from being regarded as interesting.
diff --git a/3rdparty/spirv-tools/source/reduce/reducer.h b/3rdparty/spirv-tools/source/reduce/reducer.h
index 0b9bfa111..5ff6b5050 100644
--- a/3rdparty/spirv-tools/source/reduce/reducer.h
+++ b/3rdparty/spirv-tools/source/reduce/reducer.h
@@ -33,7 +33,8 @@ class Reducer {
   enum ReductionResultStatus {
     kInitialStateNotInteresting,
     kReachedStepLimit,
-    kComplete
+    kComplete,
+    kInitialStateInvalid
   };
 
   // The type for a function that will take a binary and return true if and
@@ -84,7 +85,8 @@ class Reducer {
   // A status is returned.
   ReductionResultStatus Run(std::vector<uint32_t>&& binary_in,
                             std::vector<uint32_t>* binary_out,
-                            spv_const_reducer_options options) const;
+                            spv_const_reducer_options options,
+                            spv_validator_options validator_options) const;
 
  private:
   struct Impl;                  // Opaque struct for holding internal data.
diff --git a/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity.cpp b/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity.cpp
new file mode 100644
index 000000000..9b952c432
--- /dev/null
+++ b/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity.cpp
@@ -0,0 +1,56 @@
+// Copyright (c) 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "remove_block_reduction_opportunity.h"
+
+#include "source/opt/ir_context.h"
+
+namespace spvtools {
+namespace reduce {
+
+using namespace opt;
+
+RemoveBlockReductionOpportunity::RemoveBlockReductionOpportunity(
+    Function* function, BasicBlock* block)
+    : function_(function), block_(block) {
+  // precondition:
+  assert(block_->begin() != block_->end() &&
+         block_->begin()->context()->get_def_use_mgr()->NumUsers(
+             block_->id()) == 0 &&
+         "RemoveBlockReductionOpportunity block must have 0 references");
+}
+
+bool RemoveBlockReductionOpportunity::PreconditionHolds() {
+  // Removing other blocks cannot disable this opportunity.
+  return true;
+}
+
+void RemoveBlockReductionOpportunity::Apply() {
+  // We need an iterator pointing to the block, hence the loop.
+  for (auto bi = function_->begin(); bi != function_->end(); ++bi) {
+    if (bi->id() == block_->id()) {
+      bi->KillAllInsts(true);
+      bi.Erase();
+      // Block removal changes the function, but we don't use analyses, so no
+      // need to invalidate them.
+      return;
+    }
+  }
+
+  assert(false &&
+         "Unreachable: we should have found a block with the desired id.");
+}
+
+}  // namespace reduce
+}  // namespace spvtools
diff --git a/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity.h b/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity.h
new file mode 100644
index 000000000..45c0c178b
--- /dev/null
+++ b/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity.h
@@ -0,0 +1,46 @@
+// Copyright (c) 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef SOURCE_REDUCE_REMOVE_BLOCK_REDUCTION_OPPORTUNITY_H_
+#define SOURCE_REDUCE_REMOVE_BLOCK_REDUCTION_OPPORTUNITY_H_
+
+#include "reduction_opportunity.h"
+#include "source/opt/basic_block.h"
+#include "source/opt/function.h"
+
+namespace spvtools {
+namespace reduce {
+
+// An opportunity to remove an unreferenced block.
+// See RemoveBlockReductionOpportunityFinder.
+class RemoveBlockReductionOpportunity : public ReductionOpportunity {
+ public:
+  // Creates the opportunity to remove |block| in |function| in |context|.
+  RemoveBlockReductionOpportunity(opt::Function* function,
+                                  opt::BasicBlock* block);
+
+  bool PreconditionHolds() override;
+
+ protected:
+  void Apply() override;
+
+ private:
+  opt::Function* function_;
+  opt::BasicBlock* block_;
+};
+
+}  // namespace reduce
+}  // namespace spvtools
+
+#endif  // SOURCE_REDUCE_REMOVE_BLOCK_REDUCTION_OPPORTUNITY_H_
diff --git a/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity_finder.cpp b/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity_finder.cpp
new file mode 100644
index 000000000..a4ca1f234
--- /dev/null
+++ b/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity_finder.cpp
@@ -0,0 +1,96 @@
+// Copyright (c) 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "source/reduce/remove_block_reduction_opportunity_finder.h"
+#include "source/reduce/remove_block_reduction_opportunity.h"
+
+namespace spvtools {
+namespace reduce {
+
+using namespace opt;
+
+std::string RemoveBlockReductionOpportunityFinder::GetName() const {
+  return "RemoveBlockReductionOpportunityFinder";
+}
+
+std::vector<std::unique_ptr<ReductionOpportunity>>
+RemoveBlockReductionOpportunityFinder::GetAvailableOpportunities(
+    opt::IRContext* context) const {
+  std::vector<std::unique_ptr<ReductionOpportunity>> result;
+
+  // Consider every block in every function.
+  for (auto& function : *context->module()) {
+    for (auto bi = function.begin(); bi != function.end(); ++bi) {
+      if (IsBlockValidOpportunity(context, function, bi)) {
+        result.push_back(spvtools::MakeUnique<RemoveBlockReductionOpportunity>(
+            &function, &*bi));
+      }
+    }
+  }
+  return result;
+}
+
+bool RemoveBlockReductionOpportunityFinder::IsBlockValidOpportunity(
+    opt::IRContext* context, opt::Function& function,
+    opt::Function::iterator& bi) {
+  assert(bi != function.end() && "Block iterator was out of bounds");
+
+  // Don't remove first block; we don't want to end up with no blocks.
+  if (bi == function.begin()) {
+    return false;
+  }
+
+  // Don't remove blocks with references.
+  if (context->get_def_use_mgr()->NumUsers(bi->id()) > 0) {
+    return false;
+  }
+
+  // Don't remove blocks whose instructions have outside references.
+  if (!BlockInstructionsHaveNoOutsideReferences(context, bi)) {
+    return false;
+  }
+
+  return true;
+}
+
+bool RemoveBlockReductionOpportunityFinder::
+    BlockInstructionsHaveNoOutsideReferences(opt::IRContext* context,
+                                             const Function::iterator& bi) {
+  // Get all instructions in block.
+  std::unordered_set<uint32_t> instructions_in_block;
+  for (const Instruction& instruction : *bi) {
+    instructions_in_block.insert(instruction.unique_id());
+  }
+
+  // For each instruction...
+  for (const Instruction& instruction : *bi) {
+    // For each use of the instruction...
+    bool no_uses_outside_block = context->get_def_use_mgr()->WhileEachUser(
+        &instruction, [&instructions_in_block](Instruction* user) -> bool {
+          // If the use is in this block, continue (return true). Otherwise, we
+          // found an outside use; return false (and stop).
+          return instructions_in_block.find(user->unique_id()) !=
+                 instructions_in_block.end();
+        });
+
+    if (!no_uses_outside_block) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+}  // namespace reduce
+}  // namespace spvtools
diff --git a/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity_finder.h b/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity_finder.h
new file mode 100644
index 000000000..83cd04b57
--- /dev/null
+++ b/3rdparty/spirv-tools/source/reduce/remove_block_reduction_opportunity_finder.h
@@ -0,0 +1,55 @@
+// Copyright (c) 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef SOURCE_REDUCE_REMOVE_BLOCK_REDUCTION_OPPORTUNITY_FINDER_H_
+#define SOURCE_REDUCE_REMOVE_BLOCK_REDUCTION_OPPORTUNITY_FINDER_H_
+
+#include "source/opt/function.h"
+#include "source/reduce/reduction_opportunity_finder.h"
+
+namespace spvtools {
+namespace reduce {
+
+// A finder of opportunities to remove a block. The optimizer can remove dead
+// code. However, the reducer needs to be able to remove at a fine-grained
+// level.
+class RemoveBlockReductionOpportunityFinder
+    : public ReductionOpportunityFinder {
+ public:
+  RemoveBlockReductionOpportunityFinder() = default;
+
+  ~RemoveBlockReductionOpportunityFinder() override = default;
+
+  std::string GetName() const final;
+
+  std::vector<std::unique_ptr<ReductionOpportunity>> GetAvailableOpportunities(
+      opt::IRContext* context) const final;
+
+ private:
+  // Returns true if the block |bi| in function |function| is a valid
+  // opportunity according to various restrictions.
+  static bool IsBlockValidOpportunity(opt::IRContext* context,
+                                      opt::Function& function,
+                                      opt::Function::iterator& bi);
+
+  // Returns true if the instructions (definitions) in block |bi| have no
+  // references, except for references from inside the block itself.
+  static bool BlockInstructionsHaveNoOutsideReferences(
+      opt::IRContext* context, const opt::Function::iterator& bi);
+};
+
+}  // namespace reduce
+}  // namespace spvtools
+
+#endif  // SOURCE_REDUCE_REMOVE_BLOCK_REDUCTION_OPPORTUNITY_FINDER_H_
diff --git a/3rdparty/spirv-tools/source/val/validate_image.cpp b/3rdparty/spirv-tools/source/val/validate_image.cpp
index 8a357ff34..72f9c51f8 100644
--- a/3rdparty/spirv-tools/source/val/validate_image.cpp
+++ b/3rdparty/spirv-tools/source/val/validate_image.cpp
@@ -800,10 +800,9 @@ spv_result_t ValidateSampledImage(ValidationState_t& _,
   // to OpPhi instructions or OpSelect instructions, or any instructions other
   // than the image lookup and query instructions specified to take an operand
   // whose type is OpTypeSampledImage.
-  std::vector<uint32_t> consumers = _.getSampledImageConsumers(inst->id());
+  std::vector<Instruction*> consumers = _.getSampledImageConsumers(inst->id());
   if (!consumers.empty()) {
-    for (auto consumer_id : consumers) {
-      const auto consumer_instr = _.FindDef(consumer_id);
+    for (auto consumer_instr : consumers) {
       const auto consumer_opcode = consumer_instr->opcode();
       if (consumer_instr->block() != inst->block()) {
         return _.diag(SPV_ERROR_INVALID_ID, inst)
@@ -814,7 +813,7 @@ spv_result_t ValidateSampledImage(ValidationState_t& _,
                << _.getIdName(inst->id())
                << "' has a consumer in a different basic "
                   "block. The consumer instruction <id> is '"
-               << _.getIdName(consumer_id) << "'.";
+               << _.getIdName(consumer_instr->id()) << "'.";
       }
       // TODO: The following check is incomplete. We should also check that the
       // Sampled Image is not used by instructions that should not take
@@ -828,8 +827,8 @@ spv_result_t ValidateSampledImage(ValidationState_t& _,
                   "operands of Op"
                << spvOpcodeString(static_cast<SpvOp>(consumer_opcode)) << "."
                << " Found result <id> '" << _.getIdName(inst->id())
-               << "' as an operand of <id> '" << _.getIdName(consumer_id)
-               << "'.";
+               << "' as an operand of <id> '"
+               << _.getIdName(consumer_instr->id()) << "'.";
       }
     }
   }
diff --git a/3rdparty/spirv-tools/source/val/validation_state.cpp b/3rdparty/spirv-tools/source/val/validation_state.cpp
index e6e5e2622..e542904ef 100644
--- a/3rdparty/spirv-tools/source/val/validation_state.cpp
+++ b/3rdparty/spirv-tools/source/val/validation_state.cpp
@@ -540,15 +540,15 @@ void ValidationState_t::RegisterInstruction(Instruction* inst) {
       const uint32_t operand_word = inst->word(operand.offset);
       Instruction* operand_inst = FindDef(operand_word);
       if (operand_inst && SpvOpSampledImage == operand_inst->opcode()) {
-        RegisterSampledImageConsumer(operand_word, inst->id());
+        RegisterSampledImageConsumer(operand_word, inst);
       }
     }
   }
 }
 
-std::vector<uint32_t> ValidationState_t::getSampledImageConsumers(
+std::vector<Instruction*> ValidationState_t::getSampledImageConsumers(
     uint32_t sampled_image_id) const {
-  std::vector<uint32_t> result;
+  std::vector<Instruction*> result;
   auto iter = sampled_image_consumers_.find(sampled_image_id);
   if (iter != sampled_image_consumers_.end()) {
     result = iter->second;
@@ -557,8 +557,8 @@ std::vector<uint32_t> ValidationState_t::getSampledImageConsumers(
 }
 
 void ValidationState_t::RegisterSampledImageConsumer(uint32_t sampled_image_id,
-                                                     uint32_t consumer_id) {
-  sampled_image_consumers_[sampled_image_id].push_back(consumer_id);
+                                                     Instruction* consumer) {
+  sampled_image_consumers_[sampled_image_id].push_back(consumer);
 }
 
 uint32_t ValidationState_t::getIdBound() const { return id_bound_; }
diff --git a/3rdparty/spirv-tools/source/val/validation_state.h b/3rdparty/spirv-tools/source/val/validation_state.h
index 94fa9456c..54d513936 100644
--- a/3rdparty/spirv-tools/source/val/validation_state.h
+++ b/3rdparty/spirv-tools/source/val/validation_state.h
@@ -432,13 +432,13 @@ class ValidationState_t {
     return all_definitions_;
   }
 
-  /// Returns a vector containing the Ids of instructions that consume the given
+  /// Returns a vector containing the instructions that consume the given
   /// SampledImage id.
-  std::vector<uint32_t> getSampledImageConsumers(uint32_t id) const;
+  std::vector<Instruction*> getSampledImageConsumers(uint32_t id) const;
 
   /// Records cons_id as a consumer of sampled_image_id.
   void RegisterSampledImageConsumer(uint32_t sampled_image_id,
-                                    uint32_t cons_id);
+                                    Instruction* consumer);
 
   /// Returns the set of Global Variables.
   std::unordered_set<uint32_t>& global_vars() { return global_vars_; }
@@ -684,7 +684,8 @@ class ValidationState_t {
 
   /// Stores a vector of instructions that use the result of a given
   /// OpSampledImage instruction.
-  std::unordered_map<uint32_t, std::vector<uint32_t>> sampled_image_consumers_;
+  std::unordered_map<uint32_t, std::vector<Instruction*>>
+      sampled_image_consumers_;
 
   /// A map of operand IDs and their names defined by the OpName instruction
   std::unordered_map<uint32_t, std::string> operand_names_;
diff --git a/3rdparty/spirv-tools/test/opt/inst_bindless_check_test.cpp b/3rdparty/spirv-tools/test/opt/inst_bindless_check_test.cpp
index 65dd7800e..deea1edcd 100644
--- a/3rdparty/spirv-tools/test/opt/inst_bindless_check_test.cpp
+++ b/3rdparty/spirv-tools/test/opt/inst_bindless_check_test.cpp
@@ -1926,7 +1926,7 @@ OpName %g_sAniso "g_sAniso"
 OpName %i_vTextureCoords "i.vTextureCoords"
 OpName %_entryPointOutput_vColor "@entryPointOutput.vColor"
 OpDecorate %g_tColor DescriptorSet 1
-OpDecorate %g_tColor Binding 1
+OpDecorate %g_tColor Binding 2
 OpMemberDecorate %PerViewConstantBuffer_t 0 Offset 0
 OpDecorate %PerViewConstantBuffer_t Block
 OpDecorate %g_sAniso DescriptorSet 1
@@ -1980,7 +1980,7 @@ OpName %g_sAniso "g_sAniso"
 OpName %i_vTextureCoords "i.vTextureCoords"
 OpName %_entryPointOutput_vColor "@entryPointOutput.vColor"
 OpDecorate %g_tColor DescriptorSet 1
-OpDecorate %g_tColor Binding 1
+OpDecorate %g_tColor Binding 2
 OpMemberDecorate %PerViewConstantBuffer_t 0 Offset 0
 OpDecorate %PerViewConstantBuffer_t Block
 OpDecorate %g_sAniso DescriptorSet 1
@@ -1988,15 +1988,15 @@ OpDecorate %g_sAniso Binding 0
 OpDecorate %i_vTextureCoords Location 0
 OpDecorate %_entryPointOutput_vColor Location 0
 OpDecorate %_runtimearr_uint ArrayStride 4
-OpDecorate %_struct_41 Block
-OpMemberDecorate %_struct_41 0 Offset 0
-OpDecorate %43 DescriptorSet 7
-OpDecorate %43 Binding 1
-OpDecorate %_struct_65 Block
-OpMemberDecorate %_struct_65 0 Offset 0
-OpMemberDecorate %_struct_65 1 Offset 4
-OpDecorate %67 DescriptorSet 7
-OpDecorate %67 Binding 0
+OpDecorate %_struct_46 Block
+OpMemberDecorate %_struct_46 0 Offset 0
+OpDecorate %48 DescriptorSet 7
+OpDecorate %48 Binding 1
+OpDecorate %_struct_71 Block
+OpMemberDecorate %_struct_71 0 Offset 0
+OpMemberDecorate %_struct_71 1 Offset 4
+OpDecorate %73 DescriptorSet 7
+OpDecorate %73 Binding 0
 OpDecorate %gl_FragCoord BuiltIn FragCoord
 %void = OpTypeVoid
 %10 = OpTypeFunction %void
@@ -2026,16 +2026,17 @@ OpDecorate %gl_FragCoord BuiltIn FragCoord
 %_entryPointOutput_vColor = OpVariable %_ptr_Output_v4float Output
 %uint_0 = OpConstant %uint 0
 %uint_2 = OpConstant %uint 2
+%41 = OpTypeFunction %uint %uint %uint
 %_runtimearr_uint = OpTypeRuntimeArray %uint
-%_struct_41 = OpTypeStruct %_runtimearr_uint
-%_ptr_StorageBuffer__struct_41 = OpTypePointer StorageBuffer %_struct_41
-%43 = OpVariable %_ptr_StorageBuffer__struct_41 StorageBuffer
+%_struct_46 = OpTypeStruct %_runtimearr_uint
+%_ptr_StorageBuffer__struct_46 = OpTypePointer StorageBuffer %_struct_46
+%48 = OpVariable %_ptr_StorageBuffer__struct_46 StorageBuffer
 %_ptr_StorageBuffer_uint = OpTypePointer StorageBuffer %uint
 %bool = OpTypeBool
-%59 = OpTypeFunction %void %uint %uint %uint %uint
-%_struct_65 = OpTypeStruct %uint %_runtimearr_uint
-%_ptr_StorageBuffer__struct_65 = OpTypePointer StorageBuffer %_struct_65
-%67 = OpVariable %_ptr_StorageBuffer__struct_65 StorageBuffer
+%65 = OpTypeFunction %void %uint %uint %uint %uint
+%_struct_71 = OpTypeStruct %uint %_runtimearr_uint
+%_ptr_StorageBuffer__struct_71 = OpTypePointer StorageBuffer %_struct_71
+%73 = OpVariable %_ptr_StorageBuffer__struct_71 StorageBuffer
 %uint_9 = OpConstant %uint 9
 %uint_4 = OpConstant %uint 4
 %uint_23 = OpConstant %uint 23
@@ -2048,7 +2049,8 @@ OpDecorate %gl_FragCoord BuiltIn FragCoord
 %uint_7 = OpConstant %uint 7
 %uint_8 = OpConstant %uint 8
 %uint_59 = OpConstant %uint 59
-%110 = OpConstantNull %v4float
+%116 = OpConstantNull %v4float
+%119 = OpTypeFunction %uint %uint %uint %uint %uint
 )";
 
   const std::string func_before =
@@ -2077,84 +2079,436 @@ OpFunctionEnd
 %34 = OpLoad %16 %33
 %35 = OpLoad %24 %g_sAniso
 %36 = OpSampledImage %26 %34 %35
-%45 = OpAccessChain %_ptr_StorageBuffer_uint %43 %uint_0 %uint_2
-%46 = OpLoad %uint %45
-%47 = OpIAdd %uint %46 %uint_1
-%48 = OpAccessChain %_ptr_StorageBuffer_uint %43 %uint_0 %47
-%49 = OpLoad %uint %48
-%51 = OpULessThan %bool %32 %49
-OpSelectionMerge %52 None
-OpBranchConditional %51 %53 %54
-%53 = OpLabel
-%55 = OpLoad %16 %33
-%56 = OpSampledImage %26 %55 %35
-%57 = OpImageSampleImplicitLod %v4float %56 %30
-OpBranch %52
-%54 = OpLabel
-%109 = OpFunctionCall %void %58 %uint_59 %uint_0 %32 %49
-OpBranch %52
-%52 = OpLabel
-%111 = OpPhi %v4float %57 %53 %110 %54
-OpStore %_entryPointOutput_vColor %111
+%55 = OpFunctionCall %uint %40 %uint_2 %uint_2
+%57 = OpULessThan %bool %32 %55
+OpSelectionMerge %58 None
+OpBranchConditional %57 %59 %60
+%59 = OpLabel
+%61 = OpLoad %16 %33
+%62 = OpSampledImage %26 %61 %35
+%136 = OpFunctionCall %uint %118 %uint_0 %uint_1 %uint_2 %32
+%137 = OpINotEqual %bool %136 %uint_0
+OpSelectionMerge %138 None
+OpBranchConditional %137 %139 %140
+%139 = OpLabel
+%141 = OpLoad %16 %33
+%142 = OpSampledImage %26 %141 %35
+%143 = OpImageSampleImplicitLod %v4float %142 %30
+OpBranch %138
+%140 = OpLabel
+%144 = OpFunctionCall %void %64 %uint_59 %uint_1 %32 %uint_0
+OpBranch %138
+%138 = OpLabel
+%145 = OpPhi %v4float %143 %139 %116 %140
+OpBranch %58
+%60 = OpLabel
+%115 = OpFunctionCall %void %64 %uint_59 %uint_0 %32 %55
+OpBranch %58
+%58 = OpLabel
+%117 = OpPhi %v4float %145 %138 %116 %60
+OpStore %_entryPointOutput_vColor %117
 OpReturn
 OpFunctionEnd
 )";
 
-  const std::string output_func =
-      R"(%58 = OpFunction %void None %59
-%60 = OpFunctionParameter %uint
-%61 = OpFunctionParameter %uint
+  const std::string new_funcs =
+      R"(%40 = OpFunction %uint None %41
+%42 = OpFunctionParameter %uint
+%43 = OpFunctionParameter %uint
+%44 = OpLabel
+%50 = OpAccessChain %_ptr_StorageBuffer_uint %48 %uint_0 %42
+%51 = OpLoad %uint %50
+%52 = OpIAdd %uint %51 %43
+%53 = OpAccessChain %_ptr_StorageBuffer_uint %48 %uint_0 %52
+%54 = OpLoad %uint %53
+OpReturnValue %54
+OpFunctionEnd
+%64 = OpFunction %void None %65
+%66 = OpFunctionParameter %uint
+%67 = OpFunctionParameter %uint
+%68 = OpFunctionParameter %uint
+%69 = OpFunctionParameter %uint
+%70 = OpLabel
+%74 = OpAccessChain %_ptr_StorageBuffer_uint %73 %uint_0
+%77 = OpAtomicIAdd %uint %74 %uint_4 %uint_0 %uint_9
+%78 = OpIAdd %uint %77 %uint_9
+%79 = OpArrayLength %uint %73 1
+%80 = OpULessThanEqual %bool %78 %79
+OpSelectionMerge %81 None
+OpBranchConditional %80 %82 %81
+%82 = OpLabel
+%83 = OpIAdd %uint %77 %uint_0
+%84 = OpAccessChain %_ptr_StorageBuffer_uint %73 %uint_1 %83
+OpStore %84 %uint_9
+%86 = OpIAdd %uint %77 %uint_1
+%87 = OpAccessChain %_ptr_StorageBuffer_uint %73 %uint_1 %86
+OpStore %87 %uint_23
+%88 = OpIAdd %uint %77 %uint_2
+%89 = OpAccessChain %_ptr_StorageBuffer_uint %73 %uint_1 %88
+OpStore %89 %66
+%91 = OpIAdd %uint %77 %uint_3
+%92 = OpAccessChain %_ptr_StorageBuffer_uint %73 %uint_1 %91
+OpStore %92 %uint_4
+%95 = OpLoad %v4float %gl_FragCoord
+%97 = OpBitcast %v4uint %95
+%98 = OpCompositeExtract %uint %97 0
+%99 = OpIAdd %uint %77 %uint_4
+%100 = OpAccessChain %_ptr_StorageBuffer_uint %73 %uint_1 %99
+OpStore %100 %98
+%101 = OpCompositeExtract %uint %97 1
+%103 = OpIAdd %uint %77 %uint_5
+%104 = OpAccessChain %_ptr_StorageBuffer_uint %73 %uint_1 %103
+OpStore %104 %101
+%106 = OpIAdd %uint %77 %uint_6
+%107 = OpAccessChain %_ptr_StorageBuffer_uint %73 %uint_1 %106
+OpStore %107 %67
+%109 = OpIAdd %uint %77 %uint_7
+%110 = OpAccessChain %_ptr_StorageBuffer_uint %73 %uint_1 %109
+OpStore %110 %68
+%112 = OpIAdd %uint %77 %uint_8
+%113 = OpAccessChain %_ptr_StorageBuffer_uint %73 %uint_1 %112
+OpStore %113 %69
+OpBranch %81
+%81 = OpLabel
+OpReturn
+OpFunctionEnd
+%118 = OpFunction %uint None %119
+%120 = OpFunctionParameter %uint
+%121 = OpFunctionParameter %uint
+%122 = OpFunctionParameter %uint
+%123 = OpFunctionParameter %uint
+%124 = OpLabel
+%125 = OpAccessChain %_ptr_StorageBuffer_uint %48 %uint_0 %120
+%126 = OpLoad %uint %125
+%127 = OpIAdd %uint %126 %121
+%128 = OpAccessChain %_ptr_StorageBuffer_uint %48 %uint_0 %127
+%129 = OpLoad %uint %128
+%130 = OpIAdd %uint %129 %122
+%131 = OpAccessChain %_ptr_StorageBuffer_uint %48 %uint_0 %130
+%132 = OpLoad %uint %131
+%133 = OpIAdd %uint %132 %123
+%134 = OpAccessChain %_ptr_StorageBuffer_uint %48 %uint_0 %133
+%135 = OpLoad %uint %134
+OpReturnValue %135
+OpFunctionEnd
+)";
+
+  // SetAssembleOptions(SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
+  SinglePassRunAndCheck<InstBindlessCheckPass>(
+      defs_before + func_before, defs_after + func_after + new_funcs, true,
+      true);
+}
+
+TEST_F(InstBindlessTest, NoInstrumentNonBindless) {
+  // This test verifies that the pass will correctly not instrument vanilla
+  // texture sample.
+  //
+  // Texture2D g_tColor;
+  //
+  // SamplerState g_sAniso;
+  //
+  // struct PS_INPUT
+  // {
+  //   float2 vTextureCoords : TEXCOORD2;
+  // };
+  //
+  // struct PS_OUTPUT
+  // {
+  //   float4 vColor : SV_Target0;
+  // };
+  //
+  // PS_OUTPUT MainPs(PS_INPUT i)
+  // {
+  //   PS_OUTPUT ps_output;
+  //   ps_output.vColor =
+  //       g_tColor.Sample(g_sAniso, i.vTextureCoords.xy);
+  //   return ps_output;
+  // }
+
+  const std::string whole_file =
+      R"(OpCapability Shader
+%1 = OpExtInstImport "GLSL.std.450"
+OpMemoryModel Logical GLSL450
+OpEntryPoint Fragment %MainPs "MainPs" %i_vTextureCoords %_entryPointOutput_vColor
+OpExecutionMode %MainPs OriginUpperLeft
+OpSource HLSL 500
+OpName %MainPs "MainPs"
+OpName %g_tColor "g_tColor"
+OpName %g_sAniso "g_sAniso"
+OpName %i_vTextureCoords "i.vTextureCoords"
+OpName %_entryPointOutput_vColor "@entryPointOutput.vColor"
+OpDecorate %g_tColor DescriptorSet 0
+OpDecorate %g_tColor Binding 0
+OpDecorate %g_sAniso DescriptorSet 0
+OpDecorate %g_sAniso Binding 0
+OpDecorate %i_vTextureCoords Location 0
+OpDecorate %_entryPointOutput_vColor Location 0
+%void = OpTypeVoid
+%8 = OpTypeFunction %void
+%float = OpTypeFloat 32
+%v2float = OpTypeVector %float 2
+%v4float = OpTypeVector %float 4
+%12 = OpTypeImage %float 2D 0 0 0 1 Unknown
+%_ptr_UniformConstant_12 = OpTypePointer UniformConstant %12
+%g_tColor = OpVariable %_ptr_UniformConstant_12 UniformConstant
+%14 = OpTypeSampler
+%_ptr_UniformConstant_14 = OpTypePointer UniformConstant %14
+%g_sAniso = OpVariable %_ptr_UniformConstant_14 UniformConstant
+%16 = OpTypeSampledImage %12
+%_ptr_Input_v2float = OpTypePointer Input %v2float
+%i_vTextureCoords = OpVariable %_ptr_Input_v2float Input
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+%_entryPointOutput_vColor = OpVariable %_ptr_Output_v4float Output
+%MainPs = OpFunction %void None %8
+%19 = OpLabel
+%20 = OpLoad %v2float %i_vTextureCoords
+%21 = OpLoad %12 %g_tColor
+%22 = OpLoad %14 %g_sAniso
+%23 = OpSampledImage %16 %21 %22
+%24 = OpImageSampleImplicitLod %v4float %23 %20
+OpStore %_entryPointOutput_vColor %24
+OpReturn
+OpFunctionEnd
+)";
+
+  // SetAssembleOptions(SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
+  SinglePassRunAndCheck<InstBindlessCheckPass>(whole_file, whole_file, true,
+                                               true);
+}
+
+TEST_F(InstBindlessTest, InstrumentInitCheckOnScalarDescriptor) {
+  // This test verifies that the pass will correctly instrument vanilla
+  // texture sample on a scalar descriptor with an initialization check if the
+  // SPV_EXT_descriptor_checking extension is enabled. This is the same shader
+  // as NoInstrumentNonBindless, but with the extension hacked on in the SPIR-V.
+
+  const std::string defs_before =
+      R"(OpCapability Shader
+OpExtension "SPV_EXT_descriptor_indexing"
+%1 = OpExtInstImport "GLSL.std.450"
+OpMemoryModel Logical GLSL450
+OpEntryPoint Fragment %MainPs "MainPs" %i_vTextureCoords %_entryPointOutput_vColor
+OpExecutionMode %MainPs OriginUpperLeft
+OpSource HLSL 500
+OpName %MainPs "MainPs"
+OpName %g_tColor "g_tColor"
+OpName %g_sAniso "g_sAniso"
+OpName %i_vTextureCoords "i.vTextureCoords"
+OpName %_entryPointOutput_vColor "@entryPointOutput.vColor"
+OpDecorate %g_tColor DescriptorSet 0
+OpDecorate %g_tColor Binding 0
+OpDecorate %g_sAniso DescriptorSet 0
+OpDecorate %g_sAniso Binding 0
+OpDecorate %i_vTextureCoords Location 0
+OpDecorate %_entryPointOutput_vColor Location 0
+%void = OpTypeVoid
+%8 = OpTypeFunction %void
+%float = OpTypeFloat 32
+%v2float = OpTypeVector %float 2
+%v4float = OpTypeVector %float 4
+%12 = OpTypeImage %float 2D 0 0 0 1 Unknown
+%_ptr_UniformConstant_12 = OpTypePointer UniformConstant %12
+%g_tColor = OpVariable %_ptr_UniformConstant_12 UniformConstant
+%14 = OpTypeSampler
+%_ptr_UniformConstant_14 = OpTypePointer UniformConstant %14
+%g_sAniso = OpVariable %_ptr_UniformConstant_14 UniformConstant
+%16 = OpTypeSampledImage %12
+%_ptr_Input_v2float = OpTypePointer Input %v2float
+%i_vTextureCoords = OpVariable %_ptr_Input_v2float Input
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+%_entryPointOutput_vColor = OpVariable %_ptr_Output_v4float Output
+)";
+
+  const std::string defs_after =
+      R"(OpCapability Shader
+OpExtension "SPV_EXT_descriptor_indexing"
+OpExtension "SPV_KHR_storage_buffer_storage_class"
+%1 = OpExtInstImport "GLSL.std.450"
+OpMemoryModel Logical GLSL450
+OpEntryPoint Fragment %MainPs "MainPs" %i_vTextureCoords %_entryPointOutput_vColor %gl_FragCoord
+OpExecutionMode %MainPs OriginUpperLeft
+OpSource HLSL 500
+OpName %MainPs "MainPs"
+OpName %g_tColor "g_tColor"
+OpName %g_sAniso "g_sAniso"
+OpName %i_vTextureCoords "i.vTextureCoords"
+OpName %_entryPointOutput_vColor "@entryPointOutput.vColor"
+OpDecorate %g_tColor DescriptorSet 0
+OpDecorate %g_tColor Binding 0
+OpDecorate %g_sAniso DescriptorSet 0
+OpDecorate %g_sAniso Binding 0
+OpDecorate %i_vTextureCoords Location 0
+OpDecorate %_entryPointOutput_vColor Location 0
+OpDecorate %_runtimearr_uint ArrayStride 4
+OpDecorate %_struct_35 Block
+OpMemberDecorate %_struct_35 0 Offset 0
+OpDecorate %37 DescriptorSet 7
+OpDecorate %37 Binding 1
+OpDecorate %_struct_67 Block
+OpMemberDecorate %_struct_67 0 Offset 0
+OpMemberDecorate %_struct_67 1 Offset 4
+OpDecorate %69 DescriptorSet 7
+OpDecorate %69 Binding 0
+OpDecorate %gl_FragCoord BuiltIn FragCoord
+%void = OpTypeVoid
+%8 = OpTypeFunction %void
+%float = OpTypeFloat 32
+%v2float = OpTypeVector %float 2
+%v4float = OpTypeVector %float 4
+%12 = OpTypeImage %float 2D 0 0 0 1 Unknown
+%_ptr_UniformConstant_12 = OpTypePointer UniformConstant %12
+%g_tColor = OpVariable %_ptr_UniformConstant_12 UniformConstant
+%14 = OpTypeSampler
+%_ptr_UniformConstant_14 = OpTypePointer UniformConstant %14
+%g_sAniso = OpVariable %_ptr_UniformConstant_14 UniformConstant
+%16 = OpTypeSampledImage %12
+%_ptr_Input_v2float = OpTypePointer Input %v2float
+%i_vTextureCoords = OpVariable %_ptr_Input_v2float Input
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+%_entryPointOutput_vColor = OpVariable %_ptr_Output_v4float Output
+%uint = OpTypeInt 32 0
+%uint_0 = OpConstant %uint 0
+%28 = OpTypeFunction %uint %uint %uint %uint %uint
+%_runtimearr_uint = OpTypeRuntimeArray %uint
+%_struct_35 = OpTypeStruct %_runtimearr_uint
+%_ptr_StorageBuffer__struct_35 = OpTypePointer StorageBuffer %_struct_35
+%37 = OpVariable %_ptr_StorageBuffer__struct_35 StorageBuffer
+%_ptr_StorageBuffer_uint = OpTypePointer StorageBuffer %uint
+%bool = OpTypeBool
+%uint_1 = OpConstant %uint 1
+%61 = OpTypeFunction %void %uint %uint %uint %uint
+%_struct_67 = OpTypeStruct %uint %_runtimearr_uint
+%_ptr_StorageBuffer__struct_67 = OpTypePointer StorageBuffer %_struct_67
+%69 = OpVariable %_ptr_StorageBuffer__struct_67 StorageBuffer
+%uint_9 = OpConstant %uint 9
+%uint_4 = OpConstant %uint 4
+%uint_23 = OpConstant %uint 23
+%uint_2 = OpConstant %uint 2
+%uint_3 = OpConstant %uint 3
+%_ptr_Input_v4float = OpTypePointer Input %v4float
+%gl_FragCoord = OpVariable %_ptr_Input_v4float Input
+%v4uint = OpTypeVector %uint 4
+%uint_5 = OpConstant %uint 5
+%uint_6 = OpConstant %uint 6
+%uint_7 = OpConstant %uint 7
+%uint_8 = OpConstant %uint 8
+%uint_40 = OpConstant %uint 40
+%113 = OpConstantNull %v4float
+)";
+
+  const std::string func_before =
+      R"(%MainPs = OpFunction %void None %8
+%19 = OpLabel
+%20 = OpLoad %v2float %i_vTextureCoords
+%21 = OpLoad %12 %g_tColor
+%22 = OpLoad %14 %g_sAniso
+%23 = OpSampledImage %16 %21 %22
+%24 = OpImageSampleImplicitLod %v4float %23 %20
+OpStore %_entryPointOutput_vColor %24
+OpReturn
+OpFunctionEnd
+)";
+
+  const std::string func_after =
+      R"(%MainPs = OpFunction %void None %8
+%19 = OpLabel
+%20 = OpLoad %v2float %i_vTextureCoords
+%21 = OpLoad %12 %g_tColor
+%22 = OpLoad %14 %g_sAniso
+%23 = OpSampledImage %16 %21 %22
+%50 = OpFunctionCall %uint %27 %uint_0 %uint_0 %uint_0 %uint_0
+%52 = OpINotEqual %bool %50 %uint_0
+OpSelectionMerge %54 None
+OpBranchConditional %52 %55 %56
+%55 = OpLabel
+%57 = OpLoad %12 %g_tColor
+%58 = OpSampledImage %16 %57 %22
+%59 = OpImageSampleImplicitLod %v4float %58 %20
+OpBranch %54
+%56 = OpLabel
+%112 = OpFunctionCall %void %60 %uint_40 %uint_1 %uint_0 %uint_0
+OpBranch %54
+%54 = OpLabel
+%114 = OpPhi %v4float %59 %55 %113 %56
+OpStore %_entryPointOutput_vColor %114
+OpReturn
+OpFunctionEnd
+)";
+
+  const std::string new_funcs =
+      R"(%27 = OpFunction %uint None %28
+%29 = OpFunctionParameter %uint
+%30 = OpFunctionParameter %uint
+%31 = OpFunctionParameter %uint
+%32 = OpFunctionParameter %uint
+%33 = OpLabel
+%39 = OpAccessChain %_ptr_StorageBuffer_uint %37 %uint_0 %29
+%40 = OpLoad %uint %39
+%41 = OpIAdd %uint %40 %30
+%42 = OpAccessChain %_ptr_StorageBuffer_uint %37 %uint_0 %41
+%43 = OpLoad %uint %42
+%44 = OpIAdd %uint %43 %31
+%45 = OpAccessChain %_ptr_StorageBuffer_uint %37 %uint_0 %44
+%46 = OpLoad %uint %45
+%47 = OpIAdd %uint %46 %32
+%48 = OpAccessChain %_ptr_StorageBuffer_uint %37 %uint_0 %47
+%49 = OpLoad %uint %48
+OpReturnValue %49
+OpFunctionEnd
+%60 = OpFunction %void None %61
 %62 = OpFunctionParameter %uint
 %63 = OpFunctionParameter %uint
-%64 = OpLabel
-%68 = OpAccessChain %_ptr_StorageBuffer_uint %67 %uint_0
-%71 = OpAtomicIAdd %uint %68 %uint_4 %uint_0 %uint_9
-%72 = OpIAdd %uint %71 %uint_9
-%73 = OpArrayLength %uint %67 1
-%74 = OpULessThanEqual %bool %72 %73
-OpSelectionMerge %75 None
-OpBranchConditional %74 %76 %75
-%76 = OpLabel
-%77 = OpIAdd %uint %71 %uint_0
-%78 = OpAccessChain %_ptr_StorageBuffer_uint %67 %uint_1 %77
-OpStore %78 %uint_9
-%80 = OpIAdd %uint %71 %uint_1
-%81 = OpAccessChain %_ptr_StorageBuffer_uint %67 %uint_1 %80
-OpStore %81 %uint_23
-%82 = OpIAdd %uint %71 %uint_2
-%83 = OpAccessChain %_ptr_StorageBuffer_uint %67 %uint_1 %82
-OpStore %83 %60
-%85 = OpIAdd %uint %71 %uint_3
-%86 = OpAccessChain %_ptr_StorageBuffer_uint %67 %uint_1 %85
-OpStore %86 %uint_4
-%89 = OpLoad %v4float %gl_FragCoord
-%91 = OpBitcast %v4uint %89
-%92 = OpCompositeExtract %uint %91 0
-%93 = OpIAdd %uint %71 %uint_4
-%94 = OpAccessChain %_ptr_StorageBuffer_uint %67 %uint_1 %93
-OpStore %94 %92
-%95 = OpCompositeExtract %uint %91 1
-%97 = OpIAdd %uint %71 %uint_5
-%98 = OpAccessChain %_ptr_StorageBuffer_uint %67 %uint_1 %97
-OpStore %98 %95
-%100 = OpIAdd %uint %71 %uint_6
-%101 = OpAccessChain %_ptr_StorageBuffer_uint %67 %uint_1 %100
-OpStore %101 %61
-%103 = OpIAdd %uint %71 %uint_7
-%104 = OpAccessChain %_ptr_StorageBuffer_uint %67 %uint_1 %103
-OpStore %104 %62
-%106 = OpIAdd %uint %71 %uint_8
-%107 = OpAccessChain %_ptr_StorageBuffer_uint %67 %uint_1 %106
-OpStore %107 %63
-OpBranch %75
-%75 = OpLabel
+%64 = OpFunctionParameter %uint
+%65 = OpFunctionParameter %uint
+%66 = OpLabel
+%70 = OpAccessChain %_ptr_StorageBuffer_uint %69 %uint_0
+%73 = OpAtomicIAdd %uint %70 %uint_4 %uint_0 %uint_9
+%74 = OpIAdd %uint %73 %uint_9
+%75 = OpArrayLength %uint %69 1
+%76 = OpULessThanEqual %bool %74 %75
+OpSelectionMerge %77 None
+OpBranchConditional %76 %78 %77
+%78 = OpLabel
+%79 = OpIAdd %uint %73 %uint_0
+%80 = OpAccessChain %_ptr_StorageBuffer_uint %69 %uint_1 %79
+OpStore %80 %uint_9
+%82 = OpIAdd %uint %73 %uint_1
+%83 = OpAccessChain %_ptr_StorageBuffer_uint %69 %uint_1 %82
+OpStore %83 %uint_23
+%85 = OpIAdd %uint %73 %uint_2
+%86 = OpAccessChain %_ptr_StorageBuffer_uint %69 %uint_1 %85
+OpStore %86 %62
+%88 = OpIAdd %uint %73 %uint_3
+%89 = OpAccessChain %_ptr_StorageBuffer_uint %69 %uint_1 %88
+OpStore %89 %uint_4
+%92 = OpLoad %v4float %gl_FragCoord
+%94 = OpBitcast %v4uint %92
+%95 = OpCompositeExtract %uint %94 0
+%96 = OpIAdd %uint %73 %uint_4
+%97 = OpAccessChain %_ptr_StorageBuffer_uint %69 %uint_1 %96
+OpStore %97 %95
+%98 = OpCompositeExtract %uint %94 1
+%100 = OpIAdd %uint %73 %uint_5
+%101 = OpAccessChain %_ptr_StorageBuffer_uint %69 %uint_1 %100
+OpStore %101 %98
+%103 = OpIAdd %uint %73 %uint_6
+%104 = OpAccessChain %_ptr_StorageBuffer_uint %69 %uint_1 %103
+OpStore %104 %63
+%106 = OpIAdd %uint %73 %uint_7
+%107 = OpAccessChain %_ptr_StorageBuffer_uint %69 %uint_1 %106
+OpStore %107 %64
+%109 = OpIAdd %uint %73 %uint_8
+%110 = OpAccessChain %_ptr_StorageBuffer_uint %69 %uint_1 %109
+OpStore %110 %65
+OpBranch %77
+%77 = OpLabel
 OpReturn
 OpFunctionEnd
 )";
 
   // SetAssembleOptions(SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
   SinglePassRunAndCheck<InstBindlessCheckPass>(
-      defs_before + func_before, defs_after + func_after + output_func, true,
+      defs_before + func_before, defs_after + func_after + new_funcs, true,
       true);
 }
 
diff --git a/3rdparty/spirv-tools/test/reduce/CMakeLists.txt b/3rdparty/spirv-tools/test/reduce/CMakeLists.txt
index df9542bfd..4acab566d 100644
--- a/3rdparty/spirv-tools/test/reduce/CMakeLists.txt
+++ b/3rdparty/spirv-tools/test/reduce/CMakeLists.txt
@@ -20,6 +20,7 @@ add_spvtools_unittest(TARGET reduce
         reduce_test_util.cpp
         reduce_test_util.h
         reducer_test.cpp
+        remove_block_test.cpp
         remove_function_test.cpp
         remove_opname_instruction_test.cpp
         remove_unreferenced_instruction_test.cpp
diff --git a/3rdparty/spirv-tools/test/reduce/reducer_test.cpp b/3rdparty/spirv-tools/test/reduce/reducer_test.cpp
index 888724c3d..73effc35a 100644
--- a/3rdparty/spirv-tools/test/reduce/reducer_test.cpp
+++ b/3rdparty/spirv-tools/test/reduce/reducer_test.cpp
@@ -229,8 +229,12 @@ TEST(ReducerTest, ExprToConstantAndRemoveUnreferenced) {
   std::vector<uint32_t> binary_out;
   spvtools::ReducerOptions reducer_options;
   reducer_options.set_step_limit(500);
+  spvtools::ValidatorOptions validator_options;
 
-  reducer.Run(std::move(binary_in), &binary_out, reducer_options);
+  Reducer::ReductionResultStatus status = reducer.Run(
+      std::move(binary_in), &binary_out, reducer_options, validator_options);
+
+  ASSERT_EQ(status, Reducer::ReductionResultStatus::kComplete);
 
   CheckEqual(env, expected, binary_out);
 }
@@ -255,7 +259,7 @@ TEST(ReducerTest, RemoveOpnameAndRemoveUnreferenced) {
          %10 = OpLabel
           %3 = OpVariable %8 Function
           %4 = OpLoad %7 %3
-               OpStore %3 %7
+               OpStore %3 %9
                OpReturn
                OpFunctionEnd
   )";
@@ -280,7 +284,7 @@ TEST(ReducerTest, RemoveOpnameAndRemoveUnreferenced) {
 
   spv_target_env env = SPV_ENV_UNIVERSAL_1_3;
   Reducer reducer(env);
-  // Make ping-pong interesting very quickly, as there are not much
+  // Make ping-pong interesting very quickly, as there are not many
   // opportunities.
   PingPongInteresting ping_pong_interesting(1);
   reducer.SetMessageConsumer(NopDiagnostic);
@@ -300,12 +304,16 @@ TEST(ReducerTest, RemoveOpnameAndRemoveUnreferenced) {
   std::vector<uint32_t> binary_out;
   spvtools::ReducerOptions reducer_options;
   reducer_options.set_step_limit(500);
+  spvtools::ValidatorOptions validator_options;
 
-  reducer.Run(std::move(binary_in), &binary_out, reducer_options);
+  Reducer::ReductionResultStatus status = reducer.Run(
+      std::move(binary_in), &binary_out, reducer_options, validator_options);
+
+  ASSERT_EQ(status, Reducer::ReductionResultStatus::kComplete);
 
   CheckEqual(env, expected, binary_out);
 }
 
 }  // namespace
 }  // namespace reduce
-}  // namespace spvtools
\ No newline at end of file
+}  // namespace spvtools
diff --git a/3rdparty/spirv-tools/test/reduce/remove_block_test.cpp b/3rdparty/spirv-tools/test/reduce/remove_block_test.cpp
new file mode 100644
index 000000000..71508c894
--- /dev/null
+++ b/3rdparty/spirv-tools/test/reduce/remove_block_test.cpp
@@ -0,0 +1,358 @@
+// Copyright (c) 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "reduce_test_util.h"
+#include "source/opt/build_module.h"
+#include "source/reduce/reduction_opportunity.h"
+#include "source/reduce/remove_block_reduction_opportunity.h"
+#include "source/reduce/remove_block_reduction_opportunity_finder.h"
+
+namespace spvtools {
+namespace reduce {
+namespace {
+
+TEST(RemoveBlockReductionPassTest, BasicCheck) {
+  std::string shader = R"(
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main"
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %4 "main"
+               OpName %8 "x"
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeInt 32 1
+          %7 = OpTypePointer Function %6
+          %9 = OpConstant %6 1
+         %10 = OpConstant %6 2
+         %11 = OpConstant %6 3
+         %12 = OpConstant %6 4
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+          %8 = OpVariable %7 Function
+               OpBranch %14
+         %13 = OpLabel ; unreachable
+               OpStore %8 %9
+               OpBranch %14
+         %14 = OpLabel
+               OpStore %8 %10
+               OpBranch %16
+         %15 = OpLabel ; unreachable
+               OpStore %8 %11
+               OpBranch %16
+         %16 = OpLabel
+               OpStore %8 %12
+               OpBranch %17
+         %17 = OpLabel
+               OpReturn
+               OpFunctionEnd
+  )";
+  const auto env = SPV_ENV_UNIVERSAL_1_3;
+  const auto consumer = nullptr;
+  const auto context =
+      BuildModule(env, consumer, shader, kReduceAssembleOption);
+  const auto ops =
+      RemoveBlockReductionOpportunityFinder().GetAvailableOpportunities(
+          context.get());
+  ASSERT_EQ(2, ops.size());
+
+  ASSERT_TRUE(ops[0]->PreconditionHolds());
+  ops[0]->TryToApply();
+
+  std::string after_op_0 = R"(
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main"
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %4 "main"
+               OpName %8 "x"
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeInt 32 1
+          %7 = OpTypePointer Function %6
+          %9 = OpConstant %6 1
+         %10 = OpConstant %6 2
+         %11 = OpConstant %6 3
+         %12 = OpConstant %6 4
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+          %8 = OpVariable %7 Function
+               OpBranch %14
+         %14 = OpLabel
+               OpStore %8 %10
+               OpBranch %16
+         %15 = OpLabel
+               OpStore %8 %11
+               OpBranch %16
+         %16 = OpLabel
+               OpStore %8 %12
+               OpBranch %17
+         %17 = OpLabel
+               OpReturn
+               OpFunctionEnd
+  )";
+
+  CheckEqual(env, after_op_0, context.get());
+
+  ASSERT_TRUE(ops[1]->PreconditionHolds());
+  ops[1]->TryToApply();
+
+  std::string after_op_1 = R"(
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main"
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %4 "main"
+               OpName %8 "x"
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeInt 32 1
+          %7 = OpTypePointer Function %6
+          %9 = OpConstant %6 1
+         %10 = OpConstant %6 2
+         %11 = OpConstant %6 3
+         %12 = OpConstant %6 4
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+          %8 = OpVariable %7 Function
+               OpBranch %14
+         %14 = OpLabel
+               OpStore %8 %10
+               OpBranch %16
+         %16 = OpLabel
+               OpStore %8 %12
+               OpBranch %17
+         %17 = OpLabel
+               OpReturn
+               OpFunctionEnd
+  )";
+
+  CheckEqual(env, after_op_1, context.get());
+}
+
+TEST(RemoveBlockReductionPassTest, UnreachableContinueAndMerge) {
+  // Loop with unreachable merge and continue target. There should be no
+  // opportunities.
+
+  std::string shader = R"(
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main"
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %4 "main"
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+               OpBranch %13
+         %13 = OpLabel
+               OpLoopMerge %16 %15 None
+               OpBranch %14
+         %14 = OpLabel
+               OpReturn
+         %15 = OpLabel
+               OpBranch %13
+         %16 = OpLabel
+               OpReturn
+               OpFunctionEnd
+  )";
+  const auto env = SPV_ENV_UNIVERSAL_1_3;
+  const auto consumer = nullptr;
+  const auto context =
+      BuildModule(env, consumer, shader, kReduceAssembleOption);
+  const auto ops =
+      RemoveBlockReductionOpportunityFinder().GetAvailableOpportunities(
+          context.get());
+  ASSERT_EQ(0, ops.size());
+}
+
+TEST(RemoveBlockReductionPassTest, OneBlock) {
+  // Function with just one block. There should be no opportunities.
+
+  std::string shader = R"(
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main"
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %4 "main"
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+               OpReturn
+               OpFunctionEnd
+  )";
+  const auto env = SPV_ENV_UNIVERSAL_1_3;
+  const auto consumer = nullptr;
+  const auto context =
+      BuildModule(env, consumer, shader, kReduceAssembleOption);
+  const auto ops =
+      RemoveBlockReductionOpportunityFinder().GetAvailableOpportunities(
+          context.get());
+  ASSERT_EQ(0, ops.size());
+}
+
+TEST(RemoveBlockReductionPassTest, UnreachableBlocksWithOutsideIdUses) {
+  // A function with two unreachable blocks A -> B. A defines ID %9 and B uses
+  // %9. There are no references to A, but removing A would be invalid because
+  // of B's use of %9, so there should be no opportunities.
+
+  std::string shader = R"(
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %2 "main"
+               OpExecutionMode %2 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %2 "main"
+          %3 = OpTypeVoid
+          %4 = OpTypeInt 32 1
+          %5 = OpTypeFunction %3
+          %6 = OpConstant %4 1
+          %2 = OpFunction %3 None %5
+          %7 = OpLabel
+               OpReturn
+          %8 = OpLabel          ; A
+          %9 = OpUndef %4
+               OpBranch %10
+         %10 = OpLabel          ; B
+         %11 = OpIAdd %4 %6 %9  ; uses %9 from A, so A cannot be removed
+               OpReturn
+               OpFunctionEnd
+  )";
+  const auto env = SPV_ENV_UNIVERSAL_1_3;
+  const auto consumer = nullptr;
+  const auto context =
+      BuildModule(env, consumer, shader, kReduceAssembleOption);
+  const auto ops =
+      RemoveBlockReductionOpportunityFinder().GetAvailableOpportunities(
+          context.get());
+  ASSERT_EQ(0, ops.size());
+}
+
+TEST(RemoveBlockReductionPassTest, UnreachableBlocksWithInsideIdUses) {
+  // Similar to the above test.
+
+  // A function with two unreachable blocks A -> B. Both blocks create and use
+  // IDs, but the uses are contained within each block, so A should be removed.
+
+  std::string shader = R"(
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %2 "main"
+               OpExecutionMode %2 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %2 "main"
+          %3 = OpTypeVoid
+          %4 = OpTypeInt 32 1
+          %5 = OpTypeFunction %3
+          %6 = OpConstant %4 1
+          %2 = OpFunction %3 None %5
+          %7 = OpLabel
+               OpReturn
+          %8 = OpLabel                     ; A
+          %9 = OpUndef %4                  ; define %9
+         %10 = OpIAdd %4 %6 %9             ; use %9
+               OpBranch %11
+         %11 = OpLabel                     ; B
+         %12 = OpUndef %4                  ; define %12
+         %13 = OpIAdd %4 %6 %12            ; use %12
+               OpReturn
+               OpFunctionEnd
+  )";
+  const auto env = SPV_ENV_UNIVERSAL_1_3;
+  const auto consumer = nullptr;
+  const auto context =
+      BuildModule(env, consumer, shader, kReduceAssembleOption);
+  auto ops = RemoveBlockReductionOpportunityFinder().GetAvailableOpportunities(
+      context.get());
+  ASSERT_EQ(1, ops.size());
+
+  ASSERT_TRUE(ops[0]->PreconditionHolds());
+
+  ops[0]->TryToApply();
+
+  // Same as above, but block A is removed.
+  std::string after_op_0 = R"(
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %2 "main"
+               OpExecutionMode %2 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %2 "main"
+          %3 = OpTypeVoid
+          %4 = OpTypeInt 32 1
+          %5 = OpTypeFunction %3
+          %6 = OpConstant %4 1
+          %2 = OpFunction %3 None %5
+          %7 = OpLabel
+               OpReturn
+         %11 = OpLabel
+         %12 = OpUndef %4
+         %13 = OpIAdd %4 %6 %12
+               OpReturn
+               OpFunctionEnd
+  )";
+
+  CheckEqual(env, after_op_0, context.get());
+
+  // Find opportunities again. There are no reference to B. B should now be
+  // removed.
+
+  ops = RemoveBlockReductionOpportunityFinder().GetAvailableOpportunities(
+      context.get());
+
+  ASSERT_EQ(1, ops.size());
+
+  ASSERT_TRUE(ops[0]->PreconditionHolds());
+
+  ops[0]->TryToApply();
+
+  // Same as above, but block B is removed.
+  std::string after_op_0_again = R"(
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %2 "main"
+               OpExecutionMode %2 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %2 "main"
+          %3 = OpTypeVoid
+          %4 = OpTypeInt 32 1
+          %5 = OpTypeFunction %3
+          %6 = OpConstant %4 1
+          %2 = OpFunction %3 None %5
+          %7 = OpLabel
+               OpReturn
+               OpFunctionEnd
+  )";
+
+  CheckEqual(env, after_op_0_again, context.get());
+}
+
+}  // namespace
+}  // namespace reduce
+}  // namespace spvtools
diff --git a/3rdparty/spirv-tools/test/reduce/validation_during_reduction_test.cpp b/3rdparty/spirv-tools/test/reduce/validation_during_reduction_test.cpp
index b8a0b206e..4fc577159 100644
--- a/3rdparty/spirv-tools/test/reduce/validation_during_reduction_test.cpp
+++ b/3rdparty/spirv-tools/test/reduce/validation_during_reduction_test.cpp
@@ -52,6 +52,65 @@ class BlindlyRemoveGlobalValuesReductionOpportunityFinder
   }
 };
 
+// A dumb reduction opportunity that exists at the start of every function whose
+// first instruction is an OpVariable instruction. When applied, the OpVariable
+// instruction is duplicated (with a fresh result id). This allows each
+// reduction step to increase the number of variables to check if the validator
+// limits are enforced.
+class OpVariableDuplicatorReductionOpportunity : public ReductionOpportunity {
+ public:
+  OpVariableDuplicatorReductionOpportunity(Function* function_)
+      : function_(function_) {}
+
+  bool PreconditionHolds() override {
+    Instruction* first_instruction = &*function_->begin()[0].begin();
+    return first_instruction->opcode() == SpvOpVariable;
+  }
+
+ protected:
+  void Apply() override {
+    // Duplicate the first OpVariable instruction.
+
+    Instruction* first_instruction = &*function_->begin()[0].begin();
+    assert(first_instruction->opcode() == SpvOpVariable &&
+           "Expected first instruction to be OpVariable");
+    IRContext* context = first_instruction->context();
+    Instruction* cloned_instruction = first_instruction->Clone(context);
+    cloned_instruction->SetResultId(context->TakeNextId());
+    cloned_instruction->InsertBefore(first_instruction);
+  }
+
+ private:
+  Function* function_;
+};
+
+// A reduction opportunity finder that finds
+// OpVariableDuplicatorReductionOpportunity.
+class OpVariableDuplicatorReductionOpportunityFinder
+    : public ReductionOpportunityFinder {
+ public:
+  OpVariableDuplicatorReductionOpportunityFinder() = default;
+
+  ~OpVariableDuplicatorReductionOpportunityFinder() override = default;
+
+  std::string GetName() const final {
+    return "LocalVariableAdderReductionOpportunityFinder";
+  };
+
+  std::vector<std::unique_ptr<ReductionOpportunity>> GetAvailableOpportunities(
+      opt::IRContext* context) const final {
+    std::vector<std::unique_ptr<ReductionOpportunity>> result;
+    for (auto& function : *context->module()) {
+      Instruction* first_instruction = &*function.begin()[0].begin();
+      if (first_instruction->opcode() == SpvOpVariable) {
+        result.push_back(
+            MakeUnique<OpVariableDuplicatorReductionOpportunity>(&function));
+      }
+    }
+    return result;
+  }
+};
+
 TEST(ValidationDuringReductionTest, CheckInvalidPassMakesNoProgress) {
   // A module whose global values are all referenced, so that any application of
   // MakeModuleInvalidPass will make the module invalid.
@@ -160,8 +219,12 @@ TEST(ValidationDuringReductionTest, CheckInvalidPassMakesNoProgress) {
   std::vector<uint32_t> binary_out;
   spvtools::ReducerOptions reducer_options;
   reducer_options.set_step_limit(500);
+  spvtools::ValidatorOptions validator_options;
 
-  reducer.Run(std::move(binary_in), &binary_out, reducer_options);
+  Reducer::ReductionResultStatus status = reducer.Run(
+      std::move(binary_in), &binary_out, reducer_options, validator_options);
+
+  ASSERT_EQ(status, Reducer::ReductionResultStatus::kComplete);
 
   // The reducer should have no impact.
   CheckEqual(env, original, binary_out);
@@ -365,11 +428,145 @@ TEST(ValidationDuringReductionTest, CheckNotAlwaysInvalidCanMakeProgress) {
   std::vector<uint32_t> binary_out;
   spvtools::ReducerOptions reducer_options;
   reducer_options.set_step_limit(500);
+  spvtools::ValidatorOptions validator_options;
+
+  Reducer::ReductionResultStatus status = reducer.Run(
+      std::move(binary_in), &binary_out, reducer_options, validator_options);
+
+  ASSERT_EQ(status, Reducer::ReductionResultStatus::kComplete);
 
-  reducer.Run(std::move(binary_in), &binary_out, reducer_options);
   CheckEqual(env, expected, binary_out);
 }
 
+// Sets up a Reducer for use in the CheckValidationOptions test; avoids
+// repetition.
+void setupReducerForCheckValidationOptions(Reducer* reducer) {
+  reducer->SetMessageConsumer(NopDiagnostic);
+
+  // Say that every module is interesting.
+  reducer->SetInterestingnessFunction(
+      [](const std::vector<uint32_t>&, uint32_t) -> bool { return true; });
+
+  // Each "reduction" step will duplicate the first OpVariable instruction in
+  // the function.
+  reducer->AddReductionPass(
+      MakeUnique<OpVariableDuplicatorReductionOpportunityFinder>());
+}
+
+TEST(ValidationDuringReductionTest, CheckValidationOptions) {
+  // A module that only validates when the "skip-block-layout" validator option
+  // is used. Also, the entry point's first instruction creates a local
+  // variable; this instruction will be duplicated on each reduction step.
+  std::string original = R"(
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Vertex %2 "Main" %3
+               OpSource HLSL 600
+               OpDecorate %3 BuiltIn Position
+               OpDecorate %4 DescriptorSet 0
+               OpDecorate %4 Binding 99
+               OpDecorate %5 ArrayStride 16
+               OpMemberDecorate %6 0 Offset 0
+               OpMemberDecorate %6 1 Offset 32
+               OpMemberDecorate %6 1 MatrixStride 16
+               OpMemberDecorate %6 1 ColMajor
+               OpMemberDecorate %6 2 Offset 96
+               OpMemberDecorate %6 3 Offset 100
+               OpMemberDecorate %6 4 Offset 112
+               OpMemberDecorate %6 4 MatrixStride 16
+               OpMemberDecorate %6 4 ColMajor
+               OpMemberDecorate %6 5 Offset 176
+               OpDecorate %6 Block
+          %7 = OpTypeFloat 32
+          %8 = OpTypeVector %7 4
+          %9 = OpTypeMatrix %8 4
+         %10 = OpTypeVector %7 2
+         %11 = OpTypeInt 32 1
+         %12 = OpTypeInt 32 0
+         %13 = OpConstant %12 2
+         %14 = OpConstant %11 1
+         %15 = OpConstant %11 5
+          %5 = OpTypeArray %8 %13
+          %6 = OpTypeStruct %5 %9 %12 %10 %9 %7
+         %16 = OpTypePointer Uniform %6
+         %17 = OpTypePointer Output %8
+         %18 = OpTypeVoid
+         %19 = OpTypeFunction %18
+         %20 = OpTypePointer Uniform %7
+          %4 = OpVariable %16 Uniform
+          %3 = OpVariable %17 Output
+         %21 = OpTypePointer Function %11
+          %2 = OpFunction %18 None %19
+         %22 = OpLabel
+         %23 = OpVariable %21 Function
+         %24 = OpAccessChain %20 %4 %15
+         %25 = OpLoad %7 %24
+         %26 = OpCompositeConstruct %8 %25 %25 %25 %25
+               OpStore %3 %26
+               OpReturn
+               OpFunctionEnd
+  )";
+
+  spv_target_env env = SPV_ENV_UNIVERSAL_1_3;
+  std::vector<uint32_t> binary_in;
+  SpirvTools t(env);
+
+  ASSERT_TRUE(t.Assemble(original, &binary_in, kReduceAssembleOption));
+  std::vector<uint32_t> binary_out;
+  spvtools::ReducerOptions reducer_options;
+  spvtools::ValidatorOptions validator_options;
+
+  reducer_options.set_step_limit(3);
+
+  // Reduction should fail because the initial state is invalid without the
+  // "skip-block-layout" validator option. Note that the interestingness test
+  // always returns true.
+  {
+    Reducer reducer(env);
+    setupReducerForCheckValidationOptions(&reducer);
+
+    Reducer::ReductionResultStatus status =
+        reducer.Run(std::vector<uint32_t>(binary_in), &binary_out,
+                    reducer_options, validator_options);
+
+    ASSERT_EQ(status, Reducer::ReductionResultStatus::kInitialStateInvalid);
+  }
+
+  // Try again with validator option.
+  validator_options.SetSkipBlockLayout(true);
+
+  // Reduction should hit step limit; module is seen as valid, interestingness
+  // test always succeeds, and the finder yields infinite opportunities.
+  {
+    Reducer reducer(env);
+    setupReducerForCheckValidationOptions(&reducer);
+
+    Reducer::ReductionResultStatus status =
+        reducer.Run(std::vector<uint32_t>(binary_in), &binary_out,
+                    reducer_options, validator_options);
+
+    ASSERT_EQ(status, Reducer::ReductionResultStatus::kReachedStepLimit);
+  }
+
+  // Now set a limit on the number of local variables.
+  validator_options.SetUniversalLimit(spv_validator_limit_max_local_variables,
+                                      2);
+
+  // Reduction should "complete"; after one step, a local variable is added and
+  // the module becomes "invalid" given the validator limits.
+  {
+    Reducer reducer(env);
+    setupReducerForCheckValidationOptions(&reducer);
+
+    Reducer::ReductionResultStatus status =
+        reducer.Run(std::vector<uint32_t>(binary_in), &binary_out,
+                    reducer_options, validator_options);
+
+    ASSERT_EQ(status, Reducer::ReductionResultStatus::kComplete);
+  }
+}
+
 }  // namespace
 }  // namespace reduce
 }  // namespace spvtools
diff --git a/3rdparty/spirv-tools/test/val/val_image_test.cpp b/3rdparty/spirv-tools/test/val/val_image_test.cpp
index 79aecb25b..2d6fe29b4 100644
--- a/3rdparty/spirv-tools/test/val/val_image_test.cpp
+++ b/3rdparty/spirv-tools/test/val/val_image_test.cpp
@@ -4452,6 +4452,38 @@ OpExtension "SPV_KHR_vulkan_memory_model"
   ASSERT_EQ(SPV_SUCCESS, ValidateInstructions(SPV_ENV_UNIVERSAL_1_3));
 }
 
+// This example used to cause a seg fault on OpReturnValue, verifying it doesn't
+// anymore.
+TEST_F(ValidateImage, Issue2463NoSegFault) {
+  const std::string spirv = R"(
+               OpCapability Linkage
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+       %void = OpTypeVoid
+          %6 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+          %8 = OpTypeImage %float 3D 0 0 0 1 Unknown
+%_ptr_UniformConstant_8 = OpTypePointer UniformConstant %8
+         %10 = OpTypeSampler
+%_ptr_UniformConstant_10 = OpTypePointer UniformConstant %10
+         %12 = OpTypeSampledImage %8
+         %13 = OpTypeFunction %12 %_ptr_UniformConstant_8 %_ptr_UniformConstant_10
+         %23 = OpFunction %12 None %13
+         %24 = OpFunctionParameter %_ptr_UniformConstant_8
+         %25 = OpFunctionParameter %_ptr_UniformConstant_10
+         %26 = OpLabel
+         %27 = OpLoad %8 %24
+         %28 = OpLoad %10 %25
+         %29 = OpSampledImage %12 %27 %28
+               OpReturnValue %29
+               OpFunctionEnd
+)";
+
+  CompileSuccessfully(spirv);
+  ASSERT_EQ(SPV_SUCCESS, ValidateInstructions());
+}
+
 }  // namespace
 }  // namespace val
 }  // namespace spvtools
diff --git a/3rdparty/spirv-tools/tools/reduce/reduce.cpp b/3rdparty/spirv-tools/tools/reduce/reduce.cpp
index bbbfd1abc..a25e6d104 100644
--- a/3rdparty/spirv-tools/tools/reduce/reduce.cpp
+++ b/3rdparty/spirv-tools/tools/reduce/reduce.cpp
@@ -110,6 +110,13 @@ Options (in lexicographical order):
                reducer will take before giving up.
   --version
                Display reducer version information.
+
+Supported validator options are as follows. See `spirv-val --help` for details.
+  --relax-logical-pointer
+  --relax-block-layout
+  --scalar-block-layout
+  --skip-block-layout
+  --relax-struct-store
 )",
       program, program);
 }
@@ -127,7 +134,8 @@ void ReduceDiagnostic(spv_message_level_t level, const char* /*source*/,
 
 ReduceStatus ParseFlags(int argc, const char** argv, const char** in_file,
                         const char** interestingness_test,
-                        spvtools::ReducerOptions* reducer_options) {
+                        spvtools::ReducerOptions* reducer_options,
+                        spvtools::ValidatorOptions* validator_options) {
   uint32_t positional_arg_index = 0;
 
   for (int argi = 1; argi < argc; ++argi) {
@@ -164,6 +172,16 @@ ReduceStatus ParseFlags(int argc, const char** argv, const char** in_file,
       assert(!*interestingness_test);
       *interestingness_test = cur_arg;
       positional_arg_index++;
+    } else if (0 == strcmp(cur_arg, "--relax-logical-pointer")) {
+      validator_options->SetRelaxLogicalPointer(true);
+    } else if (0 == strcmp(cur_arg, "--relax-block-layout")) {
+      validator_options->SetRelaxBlockLayout(true);
+    } else if (0 == strcmp(cur_arg, "--scalar-block-layout")) {
+      validator_options->SetScalarBlockLayout(true);
+    } else if (0 == strcmp(cur_arg, "--skip-block-layout")) {
+      validator_options->SetSkipBlockLayout(true);
+    } else if (0 == strcmp(cur_arg, "--relax-struct-store")) {
+      validator_options->SetRelaxStructStore(true);
     } else {
       spvtools::Error(ReduceDiagnostic, nullptr, {},
                       "Too many positional arguments specified");
@@ -195,9 +213,10 @@ int main(int argc, const char** argv) {
 
   spv_target_env target_env = kDefaultEnvironment;
   spvtools::ReducerOptions reducer_options;
+  spvtools::ValidatorOptions validator_options;
 
-  ReduceStatus status =
-      ParseFlags(argc, argv, &in_file, &interestingness_test, &reducer_options);
+  ReduceStatus status = ParseFlags(argc, argv, &in_file, &interestingness_test,
+                                   &reducer_options, &validator_options);
 
   if (status.action == REDUCE_STOP) {
     return status.code;
@@ -255,8 +274,8 @@ int main(int argc, const char** argv) {
   }
 
   std::vector<uint32_t> binary_out;
-  const auto reduction_status =
-      reducer.Run(std::move(binary_in), &binary_out, reducer_options);
+  const auto reduction_status = reducer.Run(std::move(binary_in), &binary_out,
+                                            reducer_options, validator_options);
 
   if (reduction_status ==
           Reducer::ReductionResultStatus::kInitialStateNotInteresting ||