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path: root/llvm/lib/Target/DirectX/DXILLegalizePass.cpp
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Diffstat (limited to 'llvm/lib/Target/DirectX/DXILLegalizePass.cpp')
-rw-r--r--llvm/lib/Target/DirectX/DXILLegalizePass.cpp97
1 files changed, 54 insertions, 43 deletions
diff --git a/llvm/lib/Target/DirectX/DXILLegalizePass.cpp b/llvm/lib/Target/DirectX/DXILLegalizePass.cpp
index c73648f..3427968 100644
--- a/llvm/lib/Target/DirectX/DXILLegalizePass.cpp
+++ b/llvm/lib/Target/DirectX/DXILLegalizePass.cpp
@@ -24,18 +24,19 @@
using namespace llvm;
-static void legalizeFreeze(Instruction &I,
+static bool legalizeFreeze(Instruction &I,
SmallVectorImpl<Instruction *> &ToRemove,
DenseMap<Value *, Value *>) {
auto *FI = dyn_cast<FreezeInst>(&I);
if (!FI)
- return;
+ return false;
FI->replaceAllUsesWith(FI->getOperand(0));
ToRemove.push_back(FI);
+ return true;
}
-static void fixI8UseChain(Instruction &I,
+static bool fixI8UseChain(Instruction &I,
SmallVectorImpl<Instruction *> &ToRemove,
DenseMap<Value *, Value *> &ReplacedValues) {
@@ -74,19 +75,19 @@ static void fixI8UseChain(Instruction &I,
if (Trunc->getDestTy()->isIntegerTy(8)) {
ReplacedValues[Trunc] = Trunc->getOperand(0);
ToRemove.push_back(Trunc);
- return;
+ return true;
}
}
if (auto *Store = dyn_cast<StoreInst>(&I)) {
if (!Store->getValueOperand()->getType()->isIntegerTy(8))
- return;
+ return false;
SmallVector<Value *> NewOperands;
ProcessOperands(NewOperands);
Value *NewStore = Builder.CreateStore(NewOperands[0], NewOperands[1]);
ReplacedValues[Store] = NewStore;
ToRemove.push_back(Store);
- return;
+ return true;
}
if (auto *Load = dyn_cast<LoadInst>(&I);
@@ -104,17 +105,17 @@ static void fixI8UseChain(Instruction &I,
LoadInst *NewLoad = Builder.CreateLoad(ElementType, NewOperands[0]);
ReplacedValues[Load] = NewLoad;
ToRemove.push_back(Load);
- return;
+ return true;
}
if (auto *Load = dyn_cast<LoadInst>(&I);
Load && isa<ConstantExpr>(Load->getPointerOperand())) {
auto *CE = dyn_cast<ConstantExpr>(Load->getPointerOperand());
if (!(CE->getOpcode() == Instruction::GetElementPtr))
- return;
+ return false;
auto *GEP = dyn_cast<GEPOperator>(CE);
if (!GEP->getSourceElementType()->isIntegerTy(8))
- return;
+ return false;
Type *ElementType = Load->getType();
ConstantInt *Offset = dyn_cast<ConstantInt>(GEP->getOperand(1));
@@ -143,12 +144,12 @@ static void fixI8UseChain(Instruction &I,
ReplacedValues[Load] = NewLoad;
Load->replaceAllUsesWith(NewLoad);
ToRemove.push_back(Load);
- return;
+ return true;
}
if (auto *BO = dyn_cast<BinaryOperator>(&I)) {
if (!I.getType()->isIntegerTy(8))
- return;
+ return false;
SmallVector<Value *> NewOperands;
ProcessOperands(NewOperands);
Value *NewInst =
@@ -162,24 +163,24 @@ static void fixI8UseChain(Instruction &I,
}
ReplacedValues[BO] = NewInst;
ToRemove.push_back(BO);
- return;
+ return true;
}
if (auto *Sel = dyn_cast<SelectInst>(&I)) {
if (!I.getType()->isIntegerTy(8))
- return;
+ return false;
SmallVector<Value *> NewOperands;
ProcessOperands(NewOperands);
Value *NewInst = Builder.CreateSelect(Sel->getCondition(), NewOperands[1],
NewOperands[2]);
ReplacedValues[Sel] = NewInst;
ToRemove.push_back(Sel);
- return;
+ return true;
}
if (auto *Cmp = dyn_cast<CmpInst>(&I)) {
if (!Cmp->getOperand(0)->getType()->isIntegerTy(8))
- return;
+ return false;
SmallVector<Value *> NewOperands;
ProcessOperands(NewOperands);
Value *NewInst =
@@ -187,18 +188,18 @@ static void fixI8UseChain(Instruction &I,
Cmp->replaceAllUsesWith(NewInst);
ReplacedValues[Cmp] = NewInst;
ToRemove.push_back(Cmp);
- return;
+ return true;
}
if (auto *Cast = dyn_cast<CastInst>(&I)) {
if (!Cast->getSrcTy()->isIntegerTy(8))
- return;
+ return false;
ToRemove.push_back(Cast);
auto *Replacement = ReplacedValues[Cast->getOperand(0)];
if (Cast->getType() == Replacement->getType()) {
Cast->replaceAllUsesWith(Replacement);
- return;
+ return true;
}
Value *AdjustedCast = nullptr;
@@ -213,7 +214,7 @@ static void fixI8UseChain(Instruction &I,
if (auto *GEP = dyn_cast<GetElementPtrInst>(&I)) {
if (!GEP->getType()->isPointerTy() ||
!GEP->getSourceElementType()->isIntegerTy(8))
- return;
+ return false;
Value *BasePtr = GEP->getPointerOperand();
if (ReplacedValues.count(BasePtr))
@@ -248,15 +249,17 @@ static void fixI8UseChain(Instruction &I,
ReplacedValues[GEP] = NewGEP;
GEP->replaceAllUsesWith(NewGEP);
ToRemove.push_back(GEP);
+ return true;
}
+ return false;
}
-static void upcastI8AllocasAndUses(Instruction &I,
+static bool upcastI8AllocasAndUses(Instruction &I,
SmallVectorImpl<Instruction *> &ToRemove,
DenseMap<Value *, Value *> &ReplacedValues) {
auto *AI = dyn_cast<AllocaInst>(&I);
if (!AI || !AI->getAllocatedType()->isIntegerTy(8))
- return;
+ return false;
Type *SmallestType = nullptr;
@@ -291,16 +294,17 @@ static void upcastI8AllocasAndUses(Instruction &I,
}
if (!SmallestType)
- return; // no valid casts found
+ return false; // no valid casts found
// Replace alloca
IRBuilder<> Builder(AI);
auto *NewAlloca = Builder.CreateAlloca(SmallestType);
ReplacedValues[AI] = NewAlloca;
ToRemove.push_back(AI);
+ return true;
}
-static void
+static bool
downcastI64toI32InsertExtractElements(Instruction &I,
SmallVectorImpl<Instruction *> &ToRemove,
DenseMap<Value *, Value *> &) {
@@ -318,6 +322,7 @@ downcastI64toI32InsertExtractElements(Instruction &I,
Extract->replaceAllUsesWith(NewExtract);
ToRemove.push_back(Extract);
+ return true;
}
}
@@ -335,8 +340,10 @@ downcastI64toI32InsertExtractElements(Instruction &I,
Insert->replaceAllUsesWith(Insert32Index);
ToRemove.push_back(Insert);
+ return true;
}
}
+ return false;
}
static void emitMemcpyExpansion(IRBuilder<> &Builder, Value *Dst, Value *Src,
@@ -453,17 +460,17 @@ static void emitMemsetExpansion(IRBuilder<> &Builder, Value *Dst, Value *Val,
// Expands the instruction `I` into corresponding loads and stores if it is a
// memcpy call. In that case, the call instruction is added to the `ToRemove`
// vector. `ReplacedValues` is unused.
-static void legalizeMemCpy(Instruction &I,
+static bool legalizeMemCpy(Instruction &I,
SmallVectorImpl<Instruction *> &ToRemove,
DenseMap<Value *, Value *> &ReplacedValues) {
CallInst *CI = dyn_cast<CallInst>(&I);
if (!CI)
- return;
+ return false;
Intrinsic::ID ID = CI->getIntrinsicID();
if (ID != Intrinsic::memcpy)
- return;
+ return false;
IRBuilder<> Builder(&I);
Value *Dst = CI->getArgOperand(0);
@@ -476,19 +483,20 @@ static void legalizeMemCpy(Instruction &I,
assert(IsVolatile->getZExtValue() == 0 && "Expected IsVolatile to be false");
emitMemcpyExpansion(Builder, Dst, Src, Length);
ToRemove.push_back(CI);
+ return true;
}
-static void legalizeMemSet(Instruction &I,
+static bool legalizeMemSet(Instruction &I,
SmallVectorImpl<Instruction *> &ToRemove,
DenseMap<Value *, Value *> &ReplacedValues) {
CallInst *CI = dyn_cast<CallInst>(&I);
if (!CI)
- return;
+ return false;
Intrinsic::ID ID = CI->getIntrinsicID();
if (ID != Intrinsic::memset)
- return;
+ return false;
IRBuilder<> Builder(&I);
Value *Dst = CI->getArgOperand(0);
@@ -497,23 +505,25 @@ static void legalizeMemSet(Instruction &I,
assert(Size && "Expected Size to be a ConstantInt");
emitMemsetExpansion(Builder, Dst, Val, Size, ReplacedValues);
ToRemove.push_back(CI);
+ return true;
}
-static void updateFnegToFsub(Instruction &I,
+static bool updateFnegToFsub(Instruction &I,
SmallVectorImpl<Instruction *> &ToRemove,
DenseMap<Value *, Value *> &) {
const Intrinsic::ID ID = I.getOpcode();
if (ID != Instruction::FNeg)
- return;
+ return false;
IRBuilder<> Builder(&I);
Value *In = I.getOperand(0);
Value *Zero = ConstantFP::get(In->getType(), -0.0);
I.replaceAllUsesWith(Builder.CreateFSub(Zero, In));
ToRemove.push_back(&I);
+ return true;
}
-static void
+static bool
legalizeGetHighLowi64Bytes(Instruction &I,
SmallVectorImpl<Instruction *> &ToRemove,
DenseMap<Value *, Value *> &ReplacedValues) {
@@ -523,13 +533,13 @@ legalizeGetHighLowi64Bytes(Instruction &I,
BitCast->getSrcTy()->isIntegerTy(64)) {
ToRemove.push_back(BitCast);
ReplacedValues[BitCast] = BitCast->getOperand(0);
- return;
+ return true;
}
}
if (auto *Extract = dyn_cast<ExtractElementInst>(&I)) {
if (!dyn_cast<BitCastInst>(Extract->getVectorOperand()))
- return;
+ return false;
auto *VecTy = dyn_cast<FixedVectorType>(Extract->getVectorOperandType());
if (VecTy && VecTy->getElementType()->isIntegerTy(32) &&
VecTy->getNumElements() == 2) {
@@ -557,12 +567,14 @@ legalizeGetHighLowi64Bytes(Instruction &I,
}
ToRemove.push_back(Extract);
Extract->replaceAllUsesWith(ReplacedValues[Extract]);
+ return true;
}
}
}
+ return false;
}
-static void
+static bool
legalizeScalarLoadStoreOnArrays(Instruction &I,
SmallVectorImpl<Instruction *> &ToRemove,
DenseMap<Value *, Value *> &) {
@@ -579,14 +591,14 @@ legalizeScalarLoadStoreOnArrays(Instruction &I,
PtrOpIndex = SI->getPointerOperandIndex();
LoadStoreTy = SI->getValueOperand()->getType();
} else
- return;
+ return false;
// If the load/store is not of a single-value type (i.e., scalar or vector)
// then we do not modify it. It shouldn't be a vector either because the
// dxil-data-scalarization pass is expected to run before this, but it's not
// incorrect to apply this transformation to vector load/stores.
if (!LoadStoreTy->isSingleValueType())
- return;
+ return false;
Type *ArrayTy;
if (auto *GlobalVarPtrOp = dyn_cast<GlobalVariable>(PtrOp))
@@ -594,10 +606,10 @@ legalizeScalarLoadStoreOnArrays(Instruction &I,
else if (auto *AllocaPtrOp = dyn_cast<AllocaInst>(PtrOp))
ArrayTy = AllocaPtrOp->getAllocatedType();
else
- return;
+ return false;
if (!isa<ArrayType>(ArrayTy))
- return;
+ return false;
assert(ArrayTy->getArrayElementType() == LoadStoreTy &&
"Expected array element type to be the same as to the scalar load or "
@@ -607,6 +619,7 @@ legalizeScalarLoadStoreOnArrays(Instruction &I,
Value *GEP = GetElementPtrInst::Create(
ArrayTy, PtrOp, {Zero, Zero}, GEPNoWrapFlags::all(), "", I.getIterator());
I.setOperand(PtrOpIndex, GEP);
+ return true;
}
namespace {
@@ -624,13 +637,11 @@ public:
ReplacedValues.clear();
for (auto &I : instructions(F)) {
for (auto &LegalizationFn : LegalizationPipeline[Stage])
- LegalizationFn(I, ToRemove, ReplacedValues);
+ MadeChange |= LegalizationFn(I, ToRemove, ReplacedValues);
}
for (auto *Inst : reverse(ToRemove))
Inst->eraseFromParent();
-
- MadeChange |= !ToRemove.empty();
}
return MadeChange;
}
@@ -639,7 +650,7 @@ private:
enum LegalizationStage { Stage1 = 0, Stage2 = 1, NumStages };
using LegalizationFnTy =
- std::function<void(Instruction &, SmallVectorImpl<Instruction *> &,
+ std::function<bool(Instruction &, SmallVectorImpl<Instruction *> &,
DenseMap<Value *, Value *> &)>;
SmallVector<LegalizationFnTy> LegalizationPipeline[NumStages];
generated by cgit v1.1 at 2025-07-27 22:25:00 +0000