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(parent: 7a3afa9) | patch
X86: optimization for -(x != 0)
authorManman Ren <mren@apple.com>
Mon, 30 Apr 2012 22:51:25 +0000 (22:51 +0000)
committerManman Ren <mren@apple.com>
Mon, 30 Apr 2012 22:51:25 +0000 (22:51 +0000)
commit16a76519a5aa0e3a351cfde8e7236119ffd8b7fb
tree97a13cf302560765c6b11772e89492122789fbc0tree | snapshot
parent7a3afa91ad8f68428373948fc16375e99bff3c6fcommit | diff
X86: optimization for -(x != 0)

This patch will optimize -(x != 0) on X86
FROM
cmpl $0x01,%edi
sbbl %eax,%eax
notl %eax
TO
negl %edi
sbbl %eax %eax

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155853 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Target/X86/X86ISelLowering.cpp diff | blob | history
test/CodeGen/X86/select.ll diff | blob | history
external/llvm
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