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Avoid emitting redundant materializations of integer constants
for things like null pointers, which at this level aren't different from regular integer constants. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57265 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -81,7 +81,9 @@ unsigned FastISel::getRegForValue(Value *V) {
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} else if (isa<AllocaInst>(V)) {
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} else if (isa<AllocaInst>(V)) {
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Reg = TargetMaterializeAlloca(cast<AllocaInst>(V));
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Reg = TargetMaterializeAlloca(cast<AllocaInst>(V));
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} else if (isa<ConstantPointerNull>(V)) {
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} else if (isa<ConstantPointerNull>(V)) {
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Reg = FastEmit_i(VT, VT, ISD::Constant, 0);
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// Translate this as an integer zero so that it can be
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// local-CSE'd with actual integer zeros.
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Reg = getRegForValue(Constant::getNullValue(TD.getIntPtrType()));
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} else if (ConstantFP *CF = dyn_cast<ConstantFP>(V)) {
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} else if (ConstantFP *CF = dyn_cast<ConstantFP>(V)) {
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Reg = FastEmit_f(VT, VT, ISD::ConstantFP, CF);
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Reg = FastEmit_f(VT, VT, ISD::ConstantFP, CF);
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@ -95,8 +97,7 @@ unsigned FastISel::getRegForValue(Value *V) {
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APFloat::rmTowardZero) != APFloat::opOK) {
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APFloat::rmTowardZero) != APFloat::opOK) {
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APInt IntVal(IntBitWidth, 2, x);
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APInt IntVal(IntBitWidth, 2, x);
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unsigned IntegerReg = FastEmit_i(IntVT.getSimpleVT(), IntVT.getSimpleVT(),
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unsigned IntegerReg = getRegForValue(ConstantInt::get(IntVal));
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ISD::Constant, IntVal.getZExtValue());
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if (IntegerReg != 0)
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if (IntegerReg != 0)
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Reg = FastEmit_r(IntVT.getSimpleVT(), VT, ISD::SINT_TO_FP, IntegerReg);
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Reg = FastEmit_r(IntVT.getSimpleVT(), VT, ISD::SINT_TO_FP, IntegerReg);
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}
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}
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