From 1ffa48cc61f5cd382566b68a2c9ff572e2a741a5 Mon Sep 17 00:00:00 2001
From: Jim Huang <jserv@biilabs.io>
Date: Sun, 21 Jul 2019 21:42:00 +0800
Subject: [PATCH] Add branch prediction hint for mi_option_get

mi_option_get is called frequently in stress tests, and the patch adds
extra hint to the compiler to emit instructions that will cause branch
prediction to favour the "likely" side of a jump instruction.
---
 src/options.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/options.c b/src/options.c
index 0f588740..84b9d2bf 100644
--- a/src/options.c
+++ b/src/options.c
@@ -51,7 +51,7 @@ static void mi_option_init(mi_option_desc_t* desc);
 long mi_option_get(mi_option_t option) {
   mi_assert(option >= 0 && option < _mi_option_last);
   mi_option_desc_t* desc = &options[option];
-  if (desc->init == UNINIT) {
+  if (mi_unlikely(desc->init == UNINIT)) {
     mi_option_init(desc);
     if (option != mi_option_verbose) {
       _mi_verbose_message("option '%s': %ld\n", desc->name, desc->value);