ArchitectureRules: Disable autovectorization for the kernel (for now.)

See #18593.
2023-09-22 16:27:37 -04:00 · 2023-09-22 16:27:37 -04:00 · 35bc8b401a
commit 35bc8b401a
parent 55b2baf2f6
1 changed files with 5 additions and 0 deletions
--- a/build/jam/ArchitectureRules
+++ b/build/jam/ArchitectureRules
@ -358,6 +358,11 @@ rule KernelArchitectureSetup architecture
 		}

 		ccBaseFlags += -ffreestanding ;
+
+		# Since GCC 13, autovectorization generates code which causes problems
+		# in various virtual machines (bare metal is apparently unaffected.)
+		# Until this can be resolved, disable for the kernel. (See #18593.)
+		ccBaseFlags += -fno-tree-vectorize ;
 	}

 	local c++BaseFlags = $(ccBaseFlags) -fno-exceptions ;