diff options
| author | Bill Wendling <isanbard@gmail.com> | 2013-11-25 05:02:20 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2013-11-25 05:02:20 +0000 |
| commit | e1679735d6df98bd71808f3c34a32599de0f40a1 (patch) | |
| tree | 359550a452de65864e3d75d459b586ec2174dd2a /test | |
| parent | d49c8fca79093f3eaaae3ee03ada65ef258f80b8 (diff) | |
| download | external_llvm-e1679735d6df98bd71808f3c34a32599de0f40a1.zip external_llvm-e1679735d6df98bd71808f3c34a32599de0f40a1.tar.gz external_llvm-e1679735d6df98bd71808f3c34a32599de0f40a1.tar.bz2 | |
Merging r195599:
------------------------------------------------------------------------
r195599 | void | 2013-11-24 21:01:21 -0800 (Sun, 24 Nov 2013) | 4 lines
Don't look past volatile loads.
A volatile load should block us from trying to coalesce stores.
PR18023
------------------------------------------------------------------------
git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@195600 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/pr18023.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/CodeGen/X86/pr18023.ll b/test/CodeGen/X86/pr18023.ll new file mode 100644 index 0000000..1b3cf24 --- /dev/null +++ b/test/CodeGen/X86/pr18023.ll @@ -0,0 +1,29 @@ +; RUN: llc < %s -mtriple x86_64-apple-macosx10.9.0 | FileCheck %s +; PR18023 + +; CHECK: movl $1, 4(%rax) +; CHECK: movl $1, 4(%rax) +; CHECK: movl $1, 4(%rax) + +@c = common global i32 0, align 4 +@a = common global [3 x i32] zeroinitializer, align 4 +@b = common global i32 0, align 4 +@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1 + +define void @func() { + store i32 1, i32* getelementptr inbounds ([3 x i32]* @a, i64 0, i64 1), align 4 + store i32 0, i32* getelementptr inbounds ([3 x i32]* @a, i64 0, i64 0), align 4 + %1 = load volatile i32* @b, align 4 + store i32 1, i32* getelementptr inbounds ([3 x i32]* @a, i64 0, i64 1), align 4 + store i32 0, i32* getelementptr inbounds ([3 x i32]* @a, i64 0, i64 1), align 4 + %2 = load volatile i32* @b, align 4 + store i32 1, i32* getelementptr inbounds ([3 x i32]* @a, i64 0, i64 1), align 4 + store i32 0, i32* getelementptr inbounds ([3 x i32]* @a, i64 0, i64 2), align 4 + %3 = load volatile i32* @b, align 4 + store i32 3, i32* @c, align 4 + %4 = load i32* getelementptr inbounds ([3 x i32]* @a, i64 0, i64 1), align 4 + %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i64 0, i64 0), i32 %4) + ret void +} + +declare i32 @printf(i8*, ...) |