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refactor some code out to a new helper method. 

llvm-svn: 91849
This commit is contained in:
Chris Lattner 2009-12-21 23:04:33 +00:00
parent eaa25da8bb
commit 927b0ac4b2
1 changed files with 27 additions and 22 deletions
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49
llvm/lib/Transforms/Scalar/GVN.cpp
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@ -1277,6 +1277,32 @@ struct AvailableValueInBlock {
assert(!isSimpleValue() && "Wrong accessor");
return cast<MemIntrinsic>(Val.getPointer());
}
/// MaterializeAdjustedValue - Emit code into this block to adjust the value
/// defined here to the specified type. This handles various coercion cases.
Value *MaterializeAdjustedValue(const Type *LoadTy,
const TargetData *TD) const {
Value *Res;
if (isSimpleValue()) {
Res = getSimpleValue();
if (Res->getType() != LoadTy) {
assert(TD && "Need target data to handle type mismatch case");
Res = GetStoreValueForLoad(Res, Offset, LoadTy, BB->getTerminator(),
*TD);
DEBUG(errs() << "GVN COERCED NONLOCAL VAL:\nOffset: " << Offset << " "
<< *getSimpleValue() << '\n'
<< *Res << '\n' << "\n\n\n");
}
} else {
Res = GetMemInstValueForLoad(getMemIntrinValue(), Offset,
LoadTy, BB->getTerminator(), *TD);
DEBUG(errs() << "GVN COERCED NONLOCAL MEM INTRIN:\nOffset: " << Offset
<< " " << *getMemIntrinValue() << '\n'
<< *Res << '\n' << "\n\n\n");
}
return Res;
}
};
/// ConstructSSAForLoadSet - Given a set of loads specified by ValuesPerBlock,
@ -1299,28 +1325,7 @@ static Value *ConstructSSAForLoadSet(LoadInst *LI,
if (SSAUpdate.HasValueForBlock(BB))
continue;
unsigned Offset = AV.Offset;
Value *AvailableVal;
if (AV.isSimpleValue()) {
AvailableVal = AV.getSimpleValue();
if (AvailableVal->getType() != LoadTy) {
assert(TD && "Need target data to handle type mismatch case");
AvailableVal = GetStoreValueForLoad(AvailableVal, Offset, LoadTy,
BB->getTerminator(), *TD);
DEBUG(errs() << "GVN COERCED NONLOCAL VAL:\nOffset: " << Offset << " "
<< *AV.getSimpleValue() << '\n'
<< *AvailableVal << '\n' << "\n\n\n");
}
} else {
AvailableVal = GetMemInstValueForLoad(AV.getMemIntrinValue(), Offset,
LoadTy, BB->getTerminator(), *TD);
DEBUG(errs() << "GVN COERCED NONLOCAL MEM INTRIN:\nOffset: " << Offset
<< " " << *AV.getMemIntrinValue() << '\n'
<< *AvailableVal << '\n' << "\n\n\n");
}
SSAUpdate.AddAvailableValue(BB, AvailableVal);
SSAUpdate.AddAvailableValue(BB, AV.MaterializeAdjustedValue(LoadTy, TD));
}
// Perform PHI construction.