diff options
Diffstat (limited to 'lib/Transforms/Scalar/InstructionCombining.cpp')
-rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 29 |
1 files changed, 6 insertions, 23 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index dbdf449..060abc5 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -441,29 +441,12 @@ static const Type *getPromotedType(const Type *Ty) { /// expression bitcast, or a GetElementPtrInst with all zero indices, return the /// operand value, otherwise return null. static Value *getBitCastOperand(Value *V) { - if (BitCastInst *I = dyn_cast<BitCastInst>(V)) - // BitCastInst? - return I->getOperand(0); - else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(V)) { - // GetElementPtrInst? - if (GEP->hasAllZeroIndices()) - return GEP->getOperand(0); - } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) { - if (CE->getOpcode() == Instruction::BitCast) - // BitCast ConstantExp? - return CE->getOperand(0); - else if (CE->getOpcode() == Instruction::GetElementPtr) { - // GetElementPtr ConstantExp? - for (User::op_iterator I = CE->op_begin() + 1, E = CE->op_end(); - I != E; ++I) { - ConstantInt *CI = dyn_cast<ConstantInt>(I); - if (!CI || !CI->isZero()) - // Any non-zero indices? Not cast-like. - return 0; - } - // All-zero indices? This is just like casting. - return CE->getOperand(0); - } + if (Operator *O = dyn_cast<Operator>(V)) { + if (O->getOpcode() == Instruction::BitCast) + return O->getOperand(0); + if (GEPOperator *GEP = dyn_cast<GEPOperator>(V)) + if (GEP->hasAllZeroIndices()) + return GEP->getPointerOperand(); } return 0; } |