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| author | Manman Ren <mren@apple.com> | 2012-07-11 19:35:12 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2012-07-11 19:35:12 +0000 |
| commit | 84ae7e9034ef4dd0b9c88c5cf0e5e91ab50a7ef1 (patch) | |
| tree | 5bc419a39de470473836a8472e717d50c3448310 /test/CodeGen/X86/jump_sign.ll | |
| parent | 3fef29d88100881e7a52e570c30052e0d44c62ee (diff) | |
| download | llvm-84ae7e9034ef4dd0b9c88c5cf0e5e91ab50a7ef1.tar.gz llvm-84ae7e9034ef4dd0b9c88c5cf0e5e91ab50a7ef1.tar.bz2 llvm-84ae7e9034ef4dd0b9c88c5cf0e5e91ab50a7ef1.tar.xz | |
X86: Update to peephole optimization to move Movr0 before (Sub, Cmp) pair.
When Movr0 is between sub and cmp, we move Movr0 before sub if it enables
removal of Cmp.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160066 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/jump_sign.ll')
| -rw-r--r-- | test/CodeGen/X86/jump_sign.ll | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/test/CodeGen/X86/jump_sign.ll b/test/CodeGen/X86/jump_sign.ll index b868218eca..49f41767a2 100644 --- a/test/CodeGen/X86/jump_sign.ll +++ b/test/CodeGen/X86/jump_sign.ll @@ -137,6 +137,18 @@ if.else: %add = add nsw i32 %sub, 1 ret i32 %add } +; rdar://11830760 +; When Movr0 is between sub and cmp, we need to move "Movr0" before sub. +define i32 @l4(i32 %a, i32 %b) nounwind { +entry: +; CHECK: l4: +; CHECK: sub +; CHECK-NOT: cmp + %cmp = icmp sgt i32 %b, %a + %sub = sub i32 %a, %b + %.sub = select i1 %cmp, i32 0, i32 %sub + ret i32 %.sub +} ; rdar://11540023 define i32 @n(i32 %x, i32 %y) nounwind { entry: |