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Type of first GEP operand is always the same as the target pointer type. 

llvm-svn: 55097
This commit is contained in:
Evan Cheng 2008-08-21 01:19:11 +00:00
parent 7b3932e5d8
commit 4b5c038cd0
1 changed files with 5 additions and 7 deletions
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12
llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -56,9 +56,7 @@ bool FastISel::SelectGetElementPtr(Instruction *I,
return false; return false;
const Type *Ty = I->getOperand(0)->getType(); const Type *Ty = I->getOperand(0)->getType();
MVT VT = MVT::getMVT(Ty, /*HandleUnknown=*/true); MVT VT = MVT::getMVT(Ty, /*HandleUnknown=*/false);
MVT::SimpleValueType PtrVT = TLI.getPointerTy().getSimpleVT();
for (GetElementPtrInst::op_iterator OI = I->op_begin()+1, E = I->op_end(); for (GetElementPtrInst::op_iterator OI = I->op_begin()+1, E = I->op_end();
OI != E; ++OI) { OI != E; ++OI) {
Value *Idx = *OI; Value *Idx = *OI;
@ -69,7 +67,7 @@ bool FastISel::SelectGetElementPtr(Instruction *I,
uint64_t Offs = TD.getStructLayout(StTy)->getElementOffset(Field); uint64_t Offs = TD.getStructLayout(StTy)->getElementOffset(Field);
// FIXME: This can be optimized by combining the add with a // FIXME: This can be optimized by combining the add with a
// subsequent one. // subsequent one.
N = FastEmit_ri(VT.getSimpleVT(), ISD::ADD, N, Offs, PtrVT); N = FastEmit_ri(VT.getSimpleVT(), ISD::ADD, N, Offs, VT.getSimpleVT());
if (N == 0) if (N == 0)
// Unhandled operand. Halt "fast" selection and bail. // Unhandled operand. Halt "fast" selection and bail.
return false; return false;
@ -83,7 +81,7 @@ bool FastISel::SelectGetElementPtr(Instruction *I,
if (CI->getZExtValue() == 0) continue; if (CI->getZExtValue() == 0) continue;
uint64_t Offs = uint64_t Offs =
TD.getABITypeSize(Ty)*cast<ConstantInt>(CI)->getSExtValue(); TD.getABITypeSize(Ty)*cast<ConstantInt>(CI)->getSExtValue();
N = FastEmit_ri(VT.getSimpleVT(), ISD::ADD, N, Offs, PtrVT); N = FastEmit_ri(VT.getSimpleVT(), ISD::ADD, N, Offs, VT.getSimpleVT());
if (N == 0) if (N == 0)
// Unhandled operand. Halt "fast" selection and bail. // Unhandled operand. Halt "fast" selection and bail.
return false; return false;
@ -99,7 +97,7 @@ bool FastISel::SelectGetElementPtr(Instruction *I,
// If the index is smaller or larger than intptr_t, truncate or extend // If the index is smaller or larger than intptr_t, truncate or extend
// it. // it.
MVT IdxVT = MVT::getMVT(Idx->getType(), /*HandleUnknown=*/true); MVT IdxVT = MVT::getMVT(Idx->getType(), /*HandleUnknown=*/false);
if (IdxVT.bitsLT(VT)) if (IdxVT.bitsLT(VT))
IdxN = FastEmit_r(VT.getSimpleVT(), ISD::SIGN_EXTEND, IdxN); IdxN = FastEmit_r(VT.getSimpleVT(), ISD::SIGN_EXTEND, IdxN);
else if (IdxVT.bitsGT(VT)) else if (IdxVT.bitsGT(VT))
@ -111,7 +109,7 @@ bool FastISel::SelectGetElementPtr(Instruction *I,
// FIXME: If multiple is power of two, turn it into a shift. The // FIXME: If multiple is power of two, turn it into a shift. The
// optimization should be in FastEmit_ri? // optimization should be in FastEmit_ri?
IdxN = FastEmit_ri(VT.getSimpleVT(), ISD::MUL, IdxN, IdxN = FastEmit_ri(VT.getSimpleVT(), ISD::MUL, IdxN,
ElementSize, PtrVT); ElementSize, VT.getSimpleVT());
if (IdxN == 0) if (IdxN == 0)
// Unhandled operand. Halt "fast" selection and bail. // Unhandled operand. Halt "fast" selection and bail.
return false; return false;