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Reduce a lot of code duplication by implementing

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ConstantExpr::getWithOperandReplaced and ConstantExpr::replaceUsesOfWithOnConstant
 in terms of ConstantExpr::getWithOperands.  While we're at it,
make sure that ConstantExpr::getWithOperands covers all instructions: it was
missing insert/extractvalue.  



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149076 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2012-01-26 20:37:11 +00:00
parent 6a5d0e2a98
commit 1a8def6ad6
1 changed files with 16 additions and 138 deletions
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154
lib/VMCore/Constants.cpp
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@ -904,66 +904,16 @@ unsigned ConstantExpr::getPredicate() const {
/// one, but with the specified operand set to the specified value.
Constant *
ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
assert(OpNo < getNumOperands() && "Operand num is out of range!");
assert(Op->getType() == getOperand(OpNo)->getType() &&
"Replacing operand with value of different type!");
if (getOperand(OpNo) == Op)
return const_cast<ConstantExpr*>(this);
SmallVector<Constant*, 8> NewOps;
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
NewOps.push_back(i == OpNo ? Op : getOperand(i));
Constant *Op0, *Op1, *Op2;
switch (getOpcode()) {
case Instruction::Trunc:
case Instruction::ZExt:
case Instruction::SExt:
case Instruction::FPTrunc:
case Instruction::FPExt:
case Instruction::UIToFP:
case Instruction::SIToFP:
case Instruction::FPToUI:
case Instruction::FPToSI:
case Instruction::PtrToInt:
case Instruction::IntToPtr:
case Instruction::BitCast:
return ConstantExpr::getCast(getOpcode(), Op, getType());
case Instruction::Select:
Op0 = (OpNo == 0) ? Op : getOperand(0);
Op1 = (OpNo == 1) ? Op : getOperand(1);
Op2 = (OpNo == 2) ? Op : getOperand(2);
return ConstantExpr::getSelect(Op0, Op1, Op2);
case Instruction::InsertElement:
Op0 = (OpNo == 0) ? Op : getOperand(0);
Op1 = (OpNo == 1) ? Op : getOperand(1);
Op2 = (OpNo == 2) ? Op : getOperand(2);
return ConstantExpr::getInsertElement(Op0, Op1, Op2);
case Instruction::ExtractElement:
Op0 = (OpNo == 0) ? Op : getOperand(0);
Op1 = (OpNo == 1) ? Op : getOperand(1);
return ConstantExpr::getExtractElement(Op0, Op1);
case Instruction::ShuffleVector:
Op0 = (OpNo == 0) ? Op : getOperand(0);
Op1 = (OpNo == 1) ? Op : getOperand(1);
Op2 = (OpNo == 2) ? Op : getOperand(2);
return ConstantExpr::getShuffleVector(Op0, Op1, Op2);
case Instruction::GetElementPtr: {
SmallVector<Constant*, 8> Ops;
Ops.resize(getNumOperands()-1);
for (unsigned i = 1, e = getNumOperands(); i != e; ++i)
Ops[i-1] = getOperand(i);
if (OpNo == 0)
return
ConstantExpr::getGetElementPtr(Op, Ops,
cast<GEPOperator>(this)->isInBounds());
Ops[OpNo-1] = Op;
return
ConstantExpr::getGetElementPtr(getOperand(0), Ops,
cast<GEPOperator>(this)->isInBounds());
}
default:
assert(getNumOperands() == 2 && "Must be binary operator?");
Op0 = (OpNo == 0) ? Op : getOperand(0);
Op1 = (OpNo == 1) ? Op : getOperand(1);
return ConstantExpr::get(getOpcode(), Op0, Op1, SubclassOptionalData);
}
return getWithOperands(NewOps);
}
/// getWithOperands - This returns the current constant expression with the
@ -999,12 +949,15 @@ getWithOperands(ArrayRef<Constant*> Ops, Type *Ty) const {
return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
case Instruction::ExtractElement:
return ConstantExpr::getExtractElement(Ops[0], Ops[1]);
case Instruction::InsertValue:
return ConstantExpr::getInsertValue(Ops[0], Ops[1], getIndices());
case Instruction::ExtractValue:
return ConstantExpr::getExtractValue(Ops[0], getIndices());
case Instruction::ShuffleVector:
return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
case Instruction::GetElementPtr:
return
ConstantExpr::getGetElementPtr(Ops[0], Ops.slice(1),
cast<GEPOperator>(this)->isInBounds());
return ConstantExpr::getGetElementPtr(Ops[0], Ops.slice(1),
cast<GEPOperator>(this)->isInBounds());
case Instruction::ICmp:
case Instruction::FCmp:
return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1]);
@ -2539,88 +2492,13 @@ void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
Constant *To = cast<Constant>(ToV);
Constant *Replacement = 0;
if (getOpcode() == Instruction::GetElementPtr) {
SmallVector<Constant*, 8> Indices;
Constant *Pointer = getOperand(0);
Indices.reserve(getNumOperands()-1);
if (Pointer == From) Pointer = To;
for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
Constant *Val = getOperand(i);
if (Val == From) Val = To;
Indices.push_back(Val);
}
Replacement = ConstantExpr::getGetElementPtr(Pointer, Indices,
cast<GEPOperator>(this)->isInBounds());
} else if (getOpcode() == Instruction::ExtractValue) {
Constant *Agg = getOperand(0);
if (Agg == From) Agg = To;
ArrayRef<unsigned> Indices = getIndices();
Replacement = ConstantExpr::getExtractValue(Agg, Indices);
} else if (getOpcode() == Instruction::InsertValue) {
Constant *Agg = getOperand(0);
Constant *Val = getOperand(1);
if (Agg == From) Agg = To;
if (Val == From) Val = To;
ArrayRef<unsigned> Indices = getIndices();
Replacement = ConstantExpr::getInsertValue(Agg, Val, Indices);
} else if (isCast()) {
assert(getOperand(0) == From && "Cast only has one use!");
Replacement = ConstantExpr::getCast(getOpcode(), To, getType());
} else if (getOpcode() == Instruction::Select) {
Constant *C1 = getOperand(0);
Constant *C2 = getOperand(1);
Constant *C3 = getOperand(2);
if (C1 == From) C1 = To;
if (C2 == From) C2 = To;
if (C3 == From) C3 = To;
Replacement = ConstantExpr::getSelect(C1, C2, C3);
} else if (getOpcode() == Instruction::ExtractElement) {
Constant *C1 = getOperand(0);
Constant *C2 = getOperand(1);
if (C1 == From) C1 = To;
if (C2 == From) C2 = To;
Replacement = ConstantExpr::getExtractElement(C1, C2);
} else if (getOpcode() == Instruction::InsertElement) {
Constant *C1 = getOperand(0);
Constant *C2 = getOperand(1);
Constant *C3 = getOperand(1);
if (C1 == From) C1 = To;
if (C2 == From) C2 = To;
if (C3 == From) C3 = To;
Replacement = ConstantExpr::getInsertElement(C1, C2, C3);
} else if (getOpcode() == Instruction::ShuffleVector) {
Constant *C1 = getOperand(0);
Constant *C2 = getOperand(1);
Constant *C3 = getOperand(2);
if (C1 == From) C1 = To;
if (C2 == From) C2 = To;
if (C3 == From) C3 = To;
Replacement = ConstantExpr::getShuffleVector(C1, C2, C3);
} else if (isCompare()) {
Constant *C1 = getOperand(0);
Constant *C2 = getOperand(1);
if (C1 == From) C1 = To;
if (C2 == From) C2 = To;
if (getOpcode() == Instruction::ICmp)
Replacement = ConstantExpr::getICmp(getPredicate(), C1, C2);
else {
assert(getOpcode() == Instruction::FCmp);
Replacement = ConstantExpr::getFCmp(getPredicate(), C1, C2);
}
} else if (getNumOperands() == 2) {
Constant *C1 = getOperand(0);
Constant *C2 = getOperand(1);
if (C1 == From) C1 = To;
if (C2 == From) C2 = To;
Replacement = ConstantExpr::get(getOpcode(), C1, C2, SubclassOptionalData);
} else {
llvm_unreachable("Unknown ConstantExpr type!");
SmallVector<Constant*, 8> NewOps;
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
Constant *Op = getOperand(i);
NewOps.push_back(Op == From ? To : Op);
}
Constant *Replacement = getWithOperands(NewOps);
assert(Replacement != this && "I didn't contain From!");
// Everyone using this now uses the replacement.