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| author | Shih-wei Liao <sliao@google.com> | 2010-02-10 11:10:31 -0800 |
|---|---|---|
| committer | Shih-wei Liao <sliao@google.com> | 2010-02-10 11:10:31 -0800 |
| commit | e264f62ca09a8f65c87a46d562a4d0f9ec5d457e (patch) | |
| tree | 59e3d57ef656cef79afa708ae0a3daf25cd91fcf /test/CodeGen/X86/mul-shift-reassoc.ll | |
| download | external_llvm-e264f62ca09a8f65c87a46d562a4d0f9ec5d457e.zip external_llvm-e264f62ca09a8f65c87a46d562a4d0f9ec5d457e.tar.gz external_llvm-e264f62ca09a8f65c87a46d562a4d0f9ec5d457e.tar.bz2 | |
Check in LLVM r95781.
Diffstat (limited to 'test/CodeGen/X86/mul-shift-reassoc.ll')
| -rw-r--r-- | test/CodeGen/X86/mul-shift-reassoc.ll | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/test/CodeGen/X86/mul-shift-reassoc.ll b/test/CodeGen/X86/mul-shift-reassoc.ll new file mode 100644 index 0000000..3777d8b --- /dev/null +++ b/test/CodeGen/X86/mul-shift-reassoc.ll @@ -0,0 +1,12 @@ +; RUN: llc < %s -march=x86 | grep lea +; RUN: llc < %s -march=x86 | not grep add + +define i32 @test(i32 %X, i32 %Y) { + ; Push the shl through the mul to allow an LEA to be formed, instead + ; of using a shift and add separately. + %tmp.2 = shl i32 %X, 1 ; <i32> [#uses=1] + %tmp.3 = mul i32 %tmp.2, %Y ; <i32> [#uses=1] + %tmp.5 = add i32 %tmp.3, %Y ; <i32> [#uses=1] + ret i32 %tmp.5 +} + |