6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-21 18:29:45 +00:00
Code Issues Projects Releases Wiki Activity

Use an irbuilder to get some trivial constant folding when doing a store

Browse Source 
of a constant.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123570 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2011-01-16 05:58:24 +00:00
parent 6eb6116d52
commit 7072853279
1 changed files with 17 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
lib/Transforms/Scalar/ScalarReplAggregates.cpp
View File

@ -1601,11 +1601,12 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI, AllocaInst *AI,
const Type *AllocaEltTy = AI->getAllocatedType();
uint64_t AllocaSizeBits = TD->getTypeAllocSizeInBits(AllocaEltTy);
IRBuilder<> Builder(SI);
// Handle tail padding by extending the operand
if (TD->getTypeSizeInBits(SrcVal->getType()) != AllocaSizeBits)
SrcVal = new ZExtInst(SrcVal,
IntegerType::get(SI->getContext(), AllocaSizeBits),
"", SI);
SrcVal = Builder.CreateZExt(SrcVal,
IntegerType::get(SI->getContext(), AllocaSizeBits));
DEBUG(dbgs() << "PROMOTING STORE TO WHOLE ALLOCA: " << *AI << '\n' << *SI
<< '\n');
@ -1626,8 +1627,7 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI, AllocaInst *AI,
Value *EltVal = SrcVal;
if (Shift) {
Value *ShiftVal = ConstantInt::get(EltVal->getType(), Shift);
EltVal = BinaryOperator::CreateLShr(EltVal, ShiftVal,
"sroa.store.elt", SI);
EltVal = Builder.CreateLShr(EltVal, ShiftVal, "sroa.store.elt");
}
// Truncate down to an integer of the right size.
@ -1637,20 +1637,18 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI, AllocaInst *AI,
if (FieldSizeBits == 0) continue;
if (FieldSizeBits != AllocaSizeBits)
EltVal = new TruncInst(EltVal,
IntegerType::get(SI->getContext(), FieldSizeBits),
"", SI);
EltVal = Builder.CreateTrunc(EltVal,
IntegerType::get(SI->getContext(), FieldSizeBits));
Value *DestField = NewElts[i];
if (EltVal->getType() == FieldTy) {
// Storing to an integer field of this size, just do it.
} else if (FieldTy->isFloatingPointTy() || FieldTy->isVectorTy()) {
// Bitcast to the right element type (for fp/vector values).
EltVal = new BitCastInst(EltVal, FieldTy, "", SI);
EltVal = Builder.CreateBitCast(EltVal, FieldTy);
} else {
// Otherwise, bitcast the dest pointer (for aggregates).
DestField = new BitCastInst(DestField,
PointerType::getUnqual(EltVal->getType()),
"", SI);
DestField = Builder.CreateBitCast(DestField,
PointerType::getUnqual(EltVal->getType()));
}
new StoreInst(EltVal, DestField, SI);
}
@ -1675,27 +1673,25 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI, AllocaInst *AI,
Value *EltVal = SrcVal;
if (Shift) {
Value *ShiftVal = ConstantInt::get(EltVal->getType(), Shift);
EltVal = BinaryOperator::CreateLShr(EltVal, ShiftVal,
"sroa.store.elt", SI);
EltVal = Builder.CreateLShr(EltVal, ShiftVal, "sroa.store.elt");
}
// Truncate down to an integer of the right size.
if (ElementSizeBits != AllocaSizeBits)
EltVal = new TruncInst(EltVal,
IntegerType::get(SI->getContext(),
ElementSizeBits), "", SI);
EltVal = Builder.CreateTrunc(EltVal,
IntegerType::get(SI->getContext(),
ElementSizeBits));
Value *DestField = NewElts[i];
if (EltVal->getType() == ArrayEltTy) {
// Storing to an integer field of this size, just do it.
} else if (ArrayEltTy->isFloatingPointTy() ||
ArrayEltTy->isVectorTy()) {
// Bitcast to the right element type (for fp/vector values).
EltVal = new BitCastInst(EltVal, ArrayEltTy, "", SI);
EltVal = Builder.CreateBitCast(EltVal, ArrayEltTy);
} else {
// Otherwise, bitcast the dest pointer (for aggregates).
DestField = new BitCastInst(DestField,
PointerType::getUnqual(EltVal->getType()),
"", SI);
DestField = Builder.CreateBitCast(DestField,
PointerType::getUnqual(EltVal->getType()));
}
new StoreInst(EltVal, DestField, SI);