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| author | Michael Kuperstein <mkuper@google.com> | 2016-07-06 21:56:18 +0000 |
|---|---|---|
| committer | Michael Kuperstein <mkuper@google.com> | 2016-07-06 21:56:18 +0000 |
| commit | 1ef6c59b1d2fe92dd842a68a037c34d5880e1460 (patch) | |
| tree | 9d9225c98667736640ff47bca4951d7160e7267a /llvm/test/CodeGen/X86/cmov.ll | |
| parent | 0a53fdf00cc42596e6354fbd2a3490defd0f6272 (diff) | |
| download | bcm5719-llvm-1ef6c59b1d2fe92dd842a68a037c34d5880e1460.tar.gz bcm5719-llvm-1ef6c59b1d2fe92dd842a68a037c34d5880e1460.zip | |
[X86] Transform setcc + movzbl into xorl + setcc
xorl + setcc is generally the preferred sequence due to the partial register
stall setcc + movzbl suffers from. As a bonus, it also encodes one byte smaller.
This fixes PR28146.
Differential Revision: http://reviews.llvm.org/D21774
llvm-svn: 274692
Diffstat (limited to 'llvm/test/CodeGen/X86/cmov.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/cmov.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/X86/cmov.ll b/llvm/test/CodeGen/X86/cmov.ll index f2f36b15d0c..9acc9ea4fb1 100644 --- a/llvm/test/CodeGen/X86/cmov.ll +++ b/llvm/test/CodeGen/X86/cmov.ll @@ -120,8 +120,8 @@ declare i32 @printf(i8* nocapture, ...) nounwind define i32 @test5(i32* nocapture %P) nounwind readonly { entry: ; CHECK-LABEL: test5: +; CHECK: xorl %eax, %eax ; CHECK: setg %al -; CHECK: movzbl %al, %eax ; CHECK: orl $-2, %eax ; CHECK: ret @@ -134,8 +134,8 @@ entry: define i32 @test6(i32* nocapture %P) nounwind readonly { entry: ; CHECK-LABEL: test6: +; CHECK: xorl %eax, %eax ; CHECK: setl %al -; CHECK: movzbl %al, %eax ; CHECK: leal 4(%rax,%rax,8), %eax ; CHECK: ret %0 = load i32, i32* %P, align 4 ; <i32> [#uses=1] |
