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| author | Wojciech Matyjewicz <wmatyjewicz@fastmail.fm> | 2007-12-12 15:21:32 +0000 |
|---|---|---|
| committer | Wojciech Matyjewicz <wmatyjewicz@fastmail.fm> | 2007-12-12 15:21:32 +0000 |
| commit | ed2232502eac83d649c61c3f9bbfbd642b864319 (patch) | |
| tree | 256e0615d6af3f7ca5776dfc29fdda31013d7da8 /test | |
| parent | bf3348d944c9b090ba9a162b170ee74bf95d6337 (diff) | |
| download | external_llvm-ed2232502eac83d649c61c3f9bbfbd642b864319.zip external_llvm-ed2232502eac83d649c61c3f9bbfbd642b864319.tar.gz external_llvm-ed2232502eac83d649c61c3f9bbfbd642b864319.tar.bz2 | |
1. "Upgrage" comments.
2. Using zero-extended value of Scale and unsigned division is safe provided
that Scale doesn't have the sign bit set.
Previously these 2 instructions:
%p = bitcast [100 x {i8,i8,i8}]* %x to i8*
%q = getelementptr i8* %p, i32 -4
were combined into:
%q = getelementptr [100 x { i8, i8, i8 }]* %x, i32 0,
i32 1431655764, i32 0
what was incorrect.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44936 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/InstCombine/2007-12-12-GEPScale.ll | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2007-12-12-GEPScale.ll b/test/Transforms/InstCombine/2007-12-12-GEPScale.ll new file mode 100644 index 0000000..6580f90 --- /dev/null +++ b/test/Transforms/InstCombine/2007-12-12-GEPScale.ll @@ -0,0 +1,10 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep 1431655764 + +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-f80:32:32" + +define i8* @foo([100 x {i8,i8,i8}]* %x) { +entry: + %p = bitcast [100 x {i8,i8,i8}]* %x to i8* + %q = getelementptr i8* %p, i32 -4 + ret i8* %q +} |