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| author | Dan Gohman <gohman@apple.com> | 2008-03-31 20:32:52 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-03-31 20:32:52 +0000 |
| commit | 729b5ff1c51532b0301074a9fe3b80304c114b01 (patch) | |
| tree | d9b9092680f8b93eb8642454450be69d167722fe /test | |
| parent | e15f4fa35789a05cd89d2452702fa4ac61a45c1f (diff) | |
| download | external_llvm-729b5ff1c51532b0301074a9fe3b80304c114b01.zip external_llvm-729b5ff1c51532b0301074a9fe3b80304c114b01.tar.gz external_llvm-729b5ff1c51532b0301074a9fe3b80304c114b01.tar.bz2 | |
Fix a DAGCombiner optimization to respect volatile qualification.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48994 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/pr2182.ll | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/CodeGen/X86/pr2182.ll b/test/CodeGen/X86/pr2182.ll new file mode 100644 index 0000000..f65725d --- /dev/null +++ b/test/CodeGen/X86/pr2182.ll @@ -0,0 +1,24 @@ +; RUN: llvm-as < %s | llc | grep {addl \$3, (%eax)} | count 4 +; PR2182 + +target datalayout = +"e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" +target triple = "i386-apple-darwin8" +@x = weak global i32 0 ; <i32*> [#uses=8] + +define void @loop_2() nounwind { +entry: + %tmp = volatile load i32* @x, align 4 ; <i32> [#uses=1] + %tmp1 = add i32 %tmp, 3 ; <i32> [#uses=1] + volatile store i32 %tmp1, i32* @x, align 4 + %tmp.1 = volatile load i32* @x, align 4 ; <i32> [#uses=1] + %tmp1.1 = add i32 %tmp.1, 3 ; <i32> [#uses=1] + volatile store i32 %tmp1.1, i32* @x, align 4 + %tmp.2 = volatile load i32* @x, align 4 ; <i32> [#uses=1] + %tmp1.2 = add i32 %tmp.2, 3 ; <i32> [#uses=1] + volatile store i32 %tmp1.2, i32* @x, align 4 + %tmp.3 = volatile load i32* @x, align 4 ; <i32> [#uses=1] + %tmp1.3 = add i32 %tmp.3, 3 ; <i32> [#uses=1] + volatile store i32 %tmp1.3, i32* @x, align 4 + ret void +} |