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| author | Nadav Rotem <nrotem@apple.com> | 2012-12-06 17:34:13 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2012-12-06 17:34:13 +0000 |
| commit | dde785cd70a4a7418f310a0d86afcbfe3dd8dbfe (patch) | |
| tree | ea4d0b0f52d1351c717e1fdaef78eb972771b108 /test | |
| parent | 67b9928a937f57831c7270ba9911515d64c2cfb9 (diff) | |
| download | llvm-dde785cd70a4a7418f310a0d86afcbfe3dd8dbfe.tar.gz llvm-dde785cd70a4a7418f310a0d86afcbfe3dd8dbfe.tar.bz2 llvm-dde785cd70a4a7418f310a0d86afcbfe3dd8dbfe.tar.xz | |
Fix a bug in the code that merges consecutive stores. Previously we did not
check if loads that happen in between stores alias with the first store in the
chain, only with the second store onwards.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169516 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/2012-12-06-python27-miscompile.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2012-12-06-python27-miscompile.ll b/test/CodeGen/X86/2012-12-06-python27-miscompile.ll new file mode 100644 index 0000000000..d9effc92fa --- /dev/null +++ b/test/CodeGen/X86/2012-12-06-python27-miscompile.ll @@ -0,0 +1,23 @@ +; RUN: llc < %s -march=x86 -mcpu=corei7 -mtriple=i686-pc-win32 | FileCheck %s + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10.8.0" + +; Make sure that we are zeroing one memory location at a time using xorl and +; not both using XMM registers. + +;CHECK: @foo +;CHECK: xorl +;CHECK-NOT: xmm +;CHECK: ret +define i32 @foo (i64* %so) nounwind uwtable ssp { +entry: + %used = getelementptr inbounds i64* %so, i32 3 + store i64 0, i64* %used, align 8 + %fill = getelementptr inbounds i64* %so, i32 2 + %L = load i64* %fill, align 8 + store i64 0, i64* %fill, align 8 + %cmp28 = icmp sgt i64 %L, 0 + %R = sext i1 %cmp28 to i32 + ret i32 %R +} |