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| author | Chad Rosier <mcrosier@codeaurora.org> | 2014-10-09 20:06:29 +0000 |
|---|---|---|
| committer | Chad Rosier <mcrosier@codeaurora.org> | 2014-10-09 20:06:29 +0000 |
| commit | bd64d46188bd8f5e7418966d995cf977f18fb336 (patch) | |
| tree | 8275f077253366609044c9da90d020d2fde2c82b /llvm/test | |
| parent | 2c3778dc51512420364910a7af3ccc890661687f (diff) | |
| download | bcm5719-llvm-bd64d46188bd8f5e7418966d995cf977f18fb336.tar.gz bcm5719-llvm-bd64d46188bd8f5e7418966d995cf977f18fb336.zip | |
[Reassociate] Don't canonicalize X - undef to X + (-undef).
Phabricator Revision: http://reviews.llvm.org/D5674
PR21205
llvm-svn: 219434
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Transforms/Reassociate/pr21205.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/llvm/test/Transforms/Reassociate/pr21205.ll b/llvm/test/Transforms/Reassociate/pr21205.ll new file mode 100644 index 00000000000..fcc7150478e --- /dev/null +++ b/llvm/test/Transforms/Reassociate/pr21205.ll @@ -0,0 +1,21 @@ +; RUN: opt -reassociate -S < %s | FileCheck %s +; PR21205 + +@a = common global i32 0, align 4 +@b = common global i32 0, align 4 + +; Don't canonicalize %conv - undef into %conv + (-undef). +; CHECK-LABEL: @test1 +; CHECK: %sub = fsub fast float %conv, undef +; CHECK: %sub1 = fadd fast float %sub, -1.000000e+00 + +define i32 @test1() { +entry: + %0 = load i32* @a, align 4 + %conv = sitofp i32 %0 to float + %sub = fsub fast float %conv, undef + %sub1 = fadd fast float %sub, -1.000000e+00 + %conv2 = fptosi float %sub1 to i32 + store i32 %conv2, i32* @b, align 4 + ret i32 undef +} |
