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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2014-06-06 21:08:55 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2014-06-06 21:08:55 +0000 |
| commit | d0700b29195b72c3af8dc8f05dfb6ed04ca3e907 (patch) | |
| tree | c0750c870807f77dd1f7e56b2d811900e3f5b33d /llvm/lib | |
| parent | 2c8dda4e53a305566bfd92967166ffe68d53851b (diff) | |
| download | bcm5719-llvm-d0700b29195b72c3af8dc8f05dfb6ed04ca3e907.tar.gz bcm5719-llvm-d0700b29195b72c3af8dc8f05dfb6ed04ca3e907.zip | |
X86: Don't turn shifts into ands if there's another use that may not check for equality.
Fixes PR19964.
llvm-svn: 210371
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 9e728c7f7a9..24cc828aca1 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -10162,7 +10162,7 @@ SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC, SDLoc dl, // If we have a constant logical shift that's only used in a comparison // against zero turn it into an equivalent AND. This allows turning it into // a TEST instruction later. - if ((X86CC == X86::COND_E || X86CC == X86::COND_NE) && + if ((X86CC == X86::COND_E || X86CC == X86::COND_NE) && Op->hasOneUse() && isa<ConstantSDNode>(Op->getOperand(1)) && !hasNonFlagsUse(Op)) { EVT VT = Op.getValueType(); unsigned BitWidth = VT.getSizeInBits(); |
