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Remove the optimize for code size limitation on r67917. Optimize 64-bit imul by constants into leas + shl regardless if optimizing for code size. The size saving from using imulq isn't worth it. Also, the lea and shl instructions may expose further optimization.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97507 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2010-03-01 22:00:11 +00:00
parent adc5347b54
commit 73736df88b
1 changed files with 0 additions and 4 deletions
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4
lib/Target/X86/X86ISelLowering.cpp
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@ -9233,10 +9233,6 @@ static SDValue PerformANDCombine(SDNode *N, SelectionDAG &DAG,
/// LEA + SHL, LEA + LEA.
static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG,
TargetLowering::DAGCombinerInfo &DCI) {
if (DAG.getMachineFunction().
getFunction()->hasFnAttr(Attribute::OptimizeForSize))
return SDValue();
if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
return SDValue();