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Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,

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e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
A update of langref will occur in a subsequent checkin.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99928 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mon P Wang
2010-03-30 20:55:56 +00:00
parent 04e3b1ef78
commit 808bab0169
27 changed files with 313 additions and 144 deletions
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55
lib/Transforms/Scalar/MemCpyOptimizer.cpp
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@ -413,7 +413,6 @@ bool MemCpyOpt::processStore(StoreInst *SI, BasicBlock::iterator &BBI) {
// interesting as a small compile-time optimization.
Ranges.addStore(0, SI);
Function *MemSetF = 0;
// Now that we have full information about ranges, loop over the ranges and
// emit memset's for anything big enough to be worthwhile.
@ -433,29 +432,40 @@ bool MemCpyOpt::processStore(StoreInst *SI, BasicBlock::iterator &BBI) {
// memset block. This ensure that the memset is dominated by any addressing
// instruction needed by the start of the block.
BasicBlock::iterator InsertPt = BI;
if (MemSetF == 0) {
const Type *Ty = Type::getInt64Ty(Context);
MemSetF = Intrinsic::getDeclaration(M, Intrinsic::memset, &Ty, 1);
}
// Get the starting pointer of the block.
StartPtr = Range.StartPtr;
// Determine alignment
unsigned Alignment = Range.Alignment;
if (Alignment == 0) {
const Type *EltType =
cast<PointerType>(StartPtr->getType())->getElementType();
Alignment = TD->getABITypeAlignment(EltType);
}
// Cast the start ptr to be i8* as memset requires.
const Type *i8Ptr = Type::getInt8PtrTy(Context);
if (StartPtr->getType() != i8Ptr)
const PointerType* StartPTy = cast<PointerType>(StartPtr->getType());
const PointerType *i8Ptr = Type::getInt8PtrTy(Context,
StartPTy->getAddressSpace());
if (StartPTy!= i8Ptr)
StartPtr = new BitCastInst(StartPtr, i8Ptr, StartPtr->getName(),
InsertPt);
Value *Ops[] = {
StartPtr, ByteVal, // Start, value
// size
ConstantInt::get(Type::getInt64Ty(Context), Range.End-Range.Start),
// align
ConstantInt::get(Type::getInt32Ty(Context), Range.Alignment)
ConstantInt::get(Type::getInt32Ty(Context), Alignment),
// volatile
ConstantInt::get(Type::getInt1Ty(Context), 0),
};
Value *C = CallInst::Create(MemSetF, Ops, Ops+4, "", InsertPt);
const Type *Tys[] = { Ops[0]->getType(), Ops[2]->getType() };
Function *MemSetF = Intrinsic::getDeclaration(M, Intrinsic::memset, Tys, 2);
Value *C = CallInst::Create(MemSetF, Ops, Ops+5, "", InsertPt);
DEBUG(dbgs() << "Replace stores:\n";
for (unsigned i = 0, e = Range.TheStores.size(); i != e; ++i)
dbgs() << *Range.TheStores[i];
@ -680,16 +690,19 @@ bool MemCpyOpt::processMemCpy(MemCpyInst *M) {
return false;
// If all checks passed, then we can transform these memcpy's
const Type *Ty = M->getLength()->getType();
const Type *ArgTys[3] = { M->getRawDest()->getType(),
MDep->getRawSource()->getType(),
M->getLength()->getType() };
Function *MemCpyFun = Intrinsic::getDeclaration(
M->getParent()->getParent()->getParent(),
M->getIntrinsicID(), &Ty, 1);
M->getIntrinsicID(), ArgTys, 3);
Value *Args[4] = {
M->getRawDest(), MDep->getRawSource(), M->getLength(), M->getAlignmentCst()
Value *Args[5] = {
M->getRawDest(), MDep->getRawSource(), M->getLength(),
M->getAlignmentCst(), M->getVolatileCst()
};
CallInst *C = CallInst::Create(MemCpyFun, Args, Args+4, "", M);
CallInst *C = CallInst::Create(MemCpyFun, Args, Args+5, "", M);
// If C and M don't interfere, then this is a valid transformation. If they
@ -728,8 +741,10 @@ bool MemCpyOpt::processMemMove(MemMoveInst *M) {
// If not, then we know we can transform this.
Module *Mod = M->getParent()->getParent()->getParent();
const Type *Ty = M->getLength()->getType();
M->setOperand(0, Intrinsic::getDeclaration(Mod, Intrinsic::memcpy, &Ty, 1));
const Type *ArgTys[3] = { M->getDest()->getType(), M->getSource()->getType(),
M->getLength()->getType() };
M->setOperand(0,
Intrinsic::getDeclaration(Mod, Intrinsic::memcpy, ArgTys, 3));
// MemDep may have over conservative information about this instruction, just
// conservatively flush it from the cache.