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split up inttoptr from ptrtoint handling, the cases aren't similar at all.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32471 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-12-12 05:18:19 +00:00
parent cb0a681989
commit ddc9401991
1 changed files with 15 additions and 22 deletions
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37
lib/CodeGen/AsmPrinter.cpp
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@ -437,33 +437,26 @@ void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
case Instruction::BitCast:
return EmitConstantValueOnly(CE->getOperand(0));
case Instruction::IntToPtr:
case Instruction::PtrToInt:{
case Instruction::IntToPtr: {
// Handle casts to pointers by changing them into casts to the appropriate
// integer type. This promotes constant folding and simplifies this code.
Constant *Op = CE->getOperand(0);
Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
return EmitConstantValueOnly(Op);
}
case Instruction::PtrToInt: {
// Support only foldable casts to/from pointers that can be eliminated by
// changing the pointer to the appropriately sized integer type.
Constant *Op = CE->getOperand(0);
const Type *OpTy = Op->getType(), *Ty = CE->getType();
const Type *Ty = CE->getType();
// Handle casts to pointers by changing them into casts to the appropriate
// integer type. This promotes constant folding and simplifies this code.
if (isa<PointerType>(Ty)) {
const Type *IntPtrTy = TD->getIntPtrType();
Instruction::CastOps opcode = Instruction::CastOps(CE->getOpcode());
if (opcode == Instruction::IntToPtr)
Op = ConstantExpr::getIntegerCast(Op, IntPtrTy, false /*ZExt*/);
else
Op = ConstantExpr::getPtrToInt(Op, IntPtrTy);
// We can emit the pointer value into this slot if the slot is an
// integer slot greater or equal to the size of the pointer.
if (Ty->isIntegral() &&
Ty->getPrimitiveSize() >= TD->getTypeSize(Op->getType()))
return EmitConstantValueOnly(Op);
}
// We know the dest type is not a pointer. Is the src value a pointer or
// integral?
if (isa<PointerType>(OpTy) || OpTy->isIntegral()) {
// We can emit the pointer value into this slot if the slot is an
// integer slot greater or equal to the size of the pointer.
if (Ty->isIntegral() && TD->getTypeSize(Ty) >= TD->getTypeSize(OpTy))
return EmitConstantValueOnly(Op);
}
assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
EmitConstantValueOnly(Op);