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Don't use __bzero for memset if the second argument isn't zero.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49050 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-04-01 20:56:18 +00:00
parent 68d599df37
commit 38c92263eb
1 changed files with 2 additions and 1 deletions
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3
lib/Target/X86/X86ISelLowering.cpp
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@ -4562,8 +4562,9 @@ SDOperand X86TargetLowering::LowerMEMSET(SDOperand Op, SelectionDAG &DAG) {
(I && I->getValue() > Subtarget->getMaxInlineSizeThreshold())) {
// Check to see if there is a specialized entry-point for memory zeroing.
const char *bzeroEntry = Subtarget->getBZeroEntry();
ConstantSDNode *V = dyn_cast<ConstantSDNode>(Op.getOperand(2));
const char *bzeroEntry =
V && V->isNullValue() ? Subtarget->getBZeroEntry() : 0;
MVT::ValueType IntPtr = getPointerTy();
const Type *IntPtrTy = getTargetData()->getIntPtrType();