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| author | Owen Anderson <resistor@mac.com> | 2012-05-07 20:47:23 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2012-05-07 20:47:23 +0000 |
| commit | f4f80e1f39a2da2de2623eb9d176b77bdbcac009 (patch) | |
| tree | e2b5d9f3556922e72be93d9b05088ca0237b7a6d /llvm/test/Transforms/Reassociate/fp-commute.ll | |
| parent | 4496c44e5f64bc5ac52ed8d1a77c0a3dfe8b4f6c (diff) | |
| download | bcm5719-llvm-f4f80e1f39a2da2de2623eb9d176b77bdbcac009.tar.gz bcm5719-llvm-f4f80e1f39a2da2de2623eb9d176b77bdbcac009.zip | |
Teach reassociate to commute FMul's and FAdd's in order to canonicalize the order of their operands across instructions. This allows for greater CSE opportunities.
llvm-svn: 156323
Diffstat (limited to 'llvm/test/Transforms/Reassociate/fp-commute.ll')
| -rw-r--r-- | llvm/test/Transforms/Reassociate/fp-commute.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/llvm/test/Transforms/Reassociate/fp-commute.ll b/llvm/test/Transforms/Reassociate/fp-commute.ll new file mode 100644 index 00000000000..5644f7ca701 --- /dev/null +++ b/llvm/test/Transforms/Reassociate/fp-commute.ll @@ -0,0 +1,16 @@ +; RUN: opt -reassociate -S < %s | FileCheck %s + +target triple = "armv7-apple-ios" + +; CHECK: test +define float @test(float %x, float %y) { +entry: +; CHECK: fmul float %x, %y +; CHECK: fmul float %x, %y + %0 = fmul float %x, %y + %1 = fmul float %y, %x + %2 = fsub float %0, %1 + ret float %1 +} + + |
