6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-24 22:24:54 +00:00
Code Issues Projects Releases Wiki Activity

Change the interface to SCEVExpander::InsertCastOfTo to take a cast opcode

Browse Source 
so the decision of which opcode to use is pushed upward to the caller.
Adjust the callers to pass the expected opcode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32535 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2006-12-13 08:06:42 +00:00
parent dccd9fe161
commit 3ba68b9eef
3 changed files with 40 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
lib/Transforms/Scalar/LoopStrengthReduce.cpp
View File

@@ -177,7 +177,7 @@ namespace {
/// getCastedVersionOf - Return the specified value casted to uintptr_t.
///
Value *getCastedVersionOf(Value *V);
Value *getCastedVersionOf(Instruction::CastOps opcode, Value *V);
private:
void runOnLoop(Loop *L);
bool AddUsersIfInteresting(Instruction *I, Loop *L,
@@ -203,19 +203,16 @@ FunctionPass *llvm::createLoopStrengthReducePass(const TargetLowering *TLI) {
/// getCastedVersionOf - Return the specified value casted to uintptr_t. This
/// assumes that the Value* V is of integer or pointer type only.
///
Value *LoopStrengthReduce::getCastedVersionOf(Value *V) {
Value *LoopStrengthReduce::getCastedVersionOf(Instruction::CastOps opcode,
Value *V) {
if (V->getType() == UIntPtrTy) return V;
if (Constant *CB = dyn_cast<Constant>(V))
if (CB->getType()->isInteger())
return ConstantExpr::getIntegerCast(CB, UIntPtrTy,
CB->getType()->isSigned());
else
return ConstantExpr::getPtrToInt(CB, UIntPtrTy);
return ConstantExpr::getCast(opcode, CB, UIntPtrTy);
Value *&New = CastedPointers[V];
if (New) return New;
New = SCEVExpander::InsertCastOfTo(V, UIntPtrTy);
New = SCEVExpander::InsertCastOfTo(opcode, V, UIntPtrTy);
DeadInsts.insert(cast<Instruction>(New));
return New;
}
@@ -258,7 +255,8 @@ SCEVHandle LoopStrengthReduce::GetExpressionSCEV(Instruction *Exp, Loop *L) {
// Build up the base expression. Insert an LLVM cast of the pointer to
// uintptr_t first.
SCEVHandle GEPVal = SCEVUnknown::get(getCastedVersionOf(GEP->getOperand(0)));
SCEVHandle GEPVal = SCEVUnknown::get(
getCastedVersionOf(Instruction::PtrToInt, GEP->getOperand(0)));
gep_type_iterator GTI = gep_type_begin(GEP);
@@ -273,7 +271,13 @@ SCEVHandle LoopStrengthReduce::GetExpressionSCEV(Instruction *Exp, Loop *L) {
GEPVal = SCEVAddExpr::get(GEPVal,
SCEVUnknown::getIntegerSCEV(Offset, UIntPtrTy));
} else {
Value *OpVal = getCastedVersionOf(GEP->getOperand(i));
unsigned GEPOpiBits =
GEP->getOperand(i)->getType()->getPrimitiveSizeInBits();
unsigned IntPtrBits = UIntPtrTy->getPrimitiveSizeInBits();
Instruction::CastOps opcode = (GEPOpiBits < IntPtrBits ?
Instruction::SExt : (GEPOpiBits > IntPtrBits ? Instruction::Trunc :
Instruction::BitCast));
Value *OpVal = getCastedVersionOf(opcode, GEP->getOperand(i));
SCEVHandle Idx = SE->getSCEV(OpVal);
uint64_t TypeSize = TD->getTypeSize(GTI.getIndexedType());
@@ -1125,8 +1129,13 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
if (L->contains(User.Inst->getParent()))
User.Inst->moveBefore(LatchBlock->getTerminator());
}
if (RewriteOp->getType() != ReplacedTy)
RewriteOp = SCEVExpander::InsertCastOfTo(RewriteOp, ReplacedTy);
if (RewriteOp->getType() != ReplacedTy) {
Instruction::CastOps opcode = Instruction::Trunc;
if (ReplacedTy->getPrimitiveSizeInBits() ==
RewriteOp->getType()->getPrimitiveSizeInBits())
opcode = Instruction::BitCast;
RewriteOp = SCEVExpander::InsertCastOfTo(opcode, RewriteOp, ReplacedTy);
}
SCEVHandle RewriteExpr = SCEVUnknown::get(RewriteOp);