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Replace inferred getCast(V,Ty) calls with more strict variants.

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Rename getZeroExtend and getSignExtend to getZExt and getSExt to match
the the casting mnemonics in the rest of LLVM.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32514 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2006-12-12 23:36:14 +00:00
parent ebc0922eeb
commit d977d8651a
10 changed files with 103 additions and 84 deletions
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26
lib/Analysis/ScalarEvolutionExpander.cpp
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@@ -20,9 +20,27 @@ using namespace llvm;
/// InsertCastOfTo - Insert a cast of V to the specified type, doing what
/// we can to share the casts.
Value *SCEVExpander::InsertCastOfTo(Value *V, const Type *Ty) {
// Compute the Cast opcode to use
Instruction::CastOps opcode = Instruction::BitCast;
if (Ty->isIntegral()) {
if (V->getType()->getTypeID() == Type::PointerTyID)
opcode = Instruction::PtrToInt;
else {
unsigned SrcBits = V->getType()->getPrimitiveSizeInBits();
unsigned DstBits = Ty->getPrimitiveSizeInBits();
opcode = (SrcBits > DstBits ? Instruction::Trunc :
(SrcBits == DstBits ? Instruction::BitCast :
(V->getType()->isSigned() ? Instruction::SExt :
Instruction::ZExt)));
}
} else if (Ty->isFloatingPoint())
opcode = Instruction::UIToFP;
else if (Ty->getTypeID() == Type::PointerTyID && V->getType()->isIntegral())
opcode = Instruction::IntToPtr;
// FIXME: keep track of the cast instruction.
if (Constant *C = dyn_cast<Constant>(V))
return ConstantExpr::getCast(C, Ty);
return ConstantExpr::getCast(opcode, C, Ty);
if (Argument *A = dyn_cast<Argument>(V)) {
// Check to see if there is already a cast!
@@ -38,8 +56,8 @@ Value *SCEVExpander::InsertCastOfTo(Value *V, const Type *Ty) {
return CI;
}
}
return CastInst::createInferredCast(
V, Ty, V->getName(), A->getParent()->getEntryBlock().begin());
return CastInst::create(opcode, V, Ty, V->getName(),
A->getParent()->getEntryBlock().begin());
}
Instruction *I = cast<Instruction>(V);
@@ -64,7 +82,7 @@ Value *SCEVExpander::InsertCastOfTo(Value *V, const Type *Ty) {
if (InvokeInst *II = dyn_cast<InvokeInst>(I))
IP = II->getNormalDest()->begin();
while (isa<PHINode>(IP)) ++IP;
return CastInst::createInferredCast(V, Ty, V->getName(), IP);
return CastInst::create(opcode, V, Ty, V->getName(), IP);
}
Value *SCEVExpander::visitMulExpr(SCEVMulExpr *S) {