IRGen: Add optnone attribute on function during O0
Amongst other, this will help LTO to correctly handle/honor files
compiled with O0, helping debugging failures.
It also seems in line with how we handle other options, like how
-fnoinline adds the appropriate attribute as well.
Differential Revision: https://reviews.llvm.org/D28404
llvm-svn: 304127
diff --git a/clang/test/CodeGen/arm64-crc32.c b/clang/test/CodeGen/arm64-crc32.c
index efb51ed..2d913fb 100644
--- a/clang/test/CodeGen/arm64-crc32.c
+++ b/clang/test/CodeGen/arm64-crc32.c
@@ -1,6 +1,6 @@
// REQUIRES: aarch64-registered-target
// RUN: %clang_cc1 -triple arm64-none-linux-gnu \
-// RUN: -S -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s
+// RUN: -disable-O0-optnone -S -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s
int crc32b(int a, char b)
{