[clang] [HLSL] Add support for elementwise and aggregate splat casting struct types with bitfields (PR #161263)
Sarah Spall via cfe-commits
cfe-commits at lists.llvm.org
Mon Sep 29 12:26:37 PDT 2025
https://github.com/spall created https://github.com/llvm/llvm-project/pull/161263
Adds support for elementwise and aggregate splat casting struct types with bitfields. Replacing existing Flattening function which used to produce a list of GEPs representing a flattened object with one that produces a list of LValues representing a flattened object. The LValues can be used by EmitStoreThroughLValue and EmitLoadOfLValue, ensuring bitfields are properly loaded and stored. This also simplifies the code in the elementwise and aggregate splat casting functions.
Closes #125986
>From 34d95372ceaab6919f816a8f305abd2db698e818 Mon Sep 17 00:00:00 2001
From: Sarah Spall <sarahspall at microsoft.com>
Date: Fri, 12 Sep 2025 13:44:19 -0700
Subject: [PATCH] flatten LValues instead of addresses to reuse existing code
to enable handling bitfields; update tests.
---
clang/lib/CodeGen/CGExpr.cpp | 102 +++++++-----
clang/lib/CodeGen/CGExprAgg.cpp | 146 +++++++-----------
clang/lib/CodeGen/CGExprScalar.cpp | 48 +++---
clang/lib/CodeGen/CodeGenFunction.h | 6 +-
clang/lib/Sema/SemaHLSL.cpp | 6 -
.../BasicFeatures/AggregateSplatCast.hlsl | 38 +++++
.../BasicFeatures/ArrayElementwiseCast.hlsl | 46 +++++-
.../BasicFeatures/StructElementwiseCast.hlsl | 121 ++++++++++++++-
.../BasicFeatures/VectorElementwiseCast.hlsl | 42 +++++
.../Language/AggregateSplatCast-errors.hlsl | 6 -
.../Language/ElementwiseCast-errors.hlsl | 21 ---
11 files changed, 384 insertions(+), 198 deletions(-)
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index e6e4947882544..04e2b64d2bd7c 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -6784,29 +6784,26 @@ LValue CodeGenFunction::EmitPseudoObjectLValue(const PseudoObjectExpr *E) {
return emitPseudoObjectExpr(*this, E, true, AggValueSlot::ignored()).LV;
}
-void CodeGenFunction::FlattenAccessAndType(
- Address Addr, QualType AddrType,
- SmallVectorImpl<std::pair<Address, llvm::Value *>> &AccessList,
- SmallVectorImpl<QualType> &FlatTypes) {
- // WorkList is list of type we are processing + the Index List to access
- // the field of that type in Addr for use in a GEP
- llvm::SmallVector<std::pair<QualType, llvm::SmallVector<llvm::Value *, 4>>,
- 16>
+void CodeGenFunction::FlattenAccessAndTypeLValue(
+ LValue Val, SmallVectorImpl<LValue> &AccessList) {
+
+ llvm::SmallVector<
+ std::tuple<LValue, QualType, llvm::SmallVector<llvm::Value *, 4>>, 16>
WorkList;
llvm::IntegerType *IdxTy = llvm::IntegerType::get(getLLVMContext(), 32);
- // Addr should be a pointer so we need to 'dereference' it
- WorkList.push_back({AddrType, {llvm::ConstantInt::get(IdxTy, 0)}});
+ WorkList.push_back({Val, Val.getType(), {llvm::ConstantInt::get(IdxTy, 0)}});
while (!WorkList.empty()) {
- auto [T, IdxList] = WorkList.pop_back_val();
+ auto [LVal, T, IdxList] = WorkList.pop_back_val();
T = T.getCanonicalType().getUnqualifiedType();
assert(!isa<MatrixType>(T) && "Matrix types not yet supported in HLSL");
+
if (const auto *CAT = dyn_cast<ConstantArrayType>(T)) {
uint64_t Size = CAT->getZExtSize();
for (int64_t I = Size - 1; I > -1; I--) {
llvm::SmallVector<llvm::Value *, 4> IdxListCopy = IdxList;
IdxListCopy.push_back(llvm::ConstantInt::get(IdxTy, I));
- WorkList.emplace_back(CAT->getElementType(), IdxListCopy);
+ WorkList.push_back({LVal, CAT->getElementType(), IdxListCopy});
}
} else if (const auto *RT = dyn_cast<RecordType>(T)) {
const RecordDecl *Record = RT->getOriginalDecl()->getDefinitionOrSelf();
@@ -6814,44 +6811,77 @@ void CodeGenFunction::FlattenAccessAndType(
const CXXRecordDecl *CXXD = dyn_cast<CXXRecordDecl>(Record);
- llvm::SmallVector<QualType, 16> FieldTypes;
+ llvm::SmallVector<
+ std::tuple<LValue, QualType, llvm::SmallVector<llvm::Value *, 4>>, 16>
+ ReverseList;
if (CXXD && CXXD->isStandardLayout())
Record = CXXD->getStandardLayoutBaseWithFields();
// deal with potential base classes
if (CXXD && !CXXD->isStandardLayout()) {
- for (auto &Base : CXXD->bases())
- FieldTypes.push_back(Base.getType());
+ if (CXXD->getNumBases() > 0) {
+ assert(CXXD->getNumBases() == 1 &&
+ "HLSL doesn't support multiple inheritance.");
+ auto Base = CXXD->bases_begin();
+ llvm::SmallVector<llvm::Value *, 4> IdxListCopy = IdxList;
+ IdxListCopy.push_back(llvm::ConstantInt::get(
+ IdxTy, 0)); // base struct should be at index zero
+ ReverseList.insert(ReverseList.end(),
+ {LVal, Base->getType(), IdxListCopy});
+ }
}
- for (auto *FD : Record->fields())
- FieldTypes.push_back(FD->getType());
+ const CGRecordLayout &Layout = CGM.getTypes().getCGRecordLayout(Record);
- for (int64_t I = FieldTypes.size() - 1; I > -1; I--) {
- llvm::SmallVector<llvm::Value *, 4> IdxListCopy = IdxList;
- IdxListCopy.push_back(llvm::ConstantInt::get(IdxTy, I));
- WorkList.insert(WorkList.end(), {FieldTypes[I], IdxListCopy});
+ llvm::Type *LLVMT = ConvertTypeForMem(T);
+ CharUnits Align = getContext().getTypeAlignInChars(T);
+ LValue RLValue;
+ bool createdGEP = false;
+ for (auto *FD : Record->fields()) {
+ if (FD->isBitField()) {
+ if (FD->isUnnamedBitField())
+ continue;
+ if (!createdGEP) {
+ createdGEP = true;
+ Address GEP = Builder.CreateInBoundsGEP(LVal.getAddress(), IdxList,
+ LLVMT, Align, "gep");
+ RLValue = MakeAddrLValue(GEP, T);
+ }
+ LValue FieldLVal = EmitLValueForField(RLValue, FD, true);
+ ReverseList.insert(ReverseList.end(), {FieldLVal, FD->getType(), {}});
+ } else {
+ llvm::SmallVector<llvm::Value *, 4> IdxListCopy = IdxList;
+ IdxListCopy.push_back(
+ llvm::ConstantInt::get(IdxTy, Layout.getLLVMFieldNo(FD)));
+ ReverseList.insert(ReverseList.end(),
+ {LVal, FD->getType(), IdxListCopy});
+ }
}
+
+ std::reverse(ReverseList.begin(), ReverseList.end());
+ llvm::append_range(WorkList, ReverseList);
} else if (const auto *VT = dyn_cast<VectorType>(T)) {
llvm::Type *LLVMT = ConvertTypeForMem(T);
CharUnits Align = getContext().getTypeAlignInChars(T);
- Address GEP =
- Builder.CreateInBoundsGEP(Addr, IdxList, LLVMT, Align, "vector.gep");
+ Address GEP = Builder.CreateInBoundsGEP(LVal.getAddress(), IdxList, LLVMT,
+ Align, "vector.gep");
+ LValue Base = MakeAddrLValue(GEP, T);
for (unsigned I = 0, E = VT->getNumElements(); I < E; I++) {
- llvm::Value *Idx = llvm::ConstantInt::get(IdxTy, I);
- // gep on vector fields is not recommended so combine gep with
- // extract/insert
- AccessList.emplace_back(GEP, Idx);
- FlatTypes.push_back(VT->getElementType());
+ llvm::Constant *Idx = llvm::ConstantInt::get(IdxTy, I);
+ LValue LV =
+ LValue::MakeVectorElt(Base.getAddress(), Idx, VT->getElementType(),
+ Base.getBaseInfo(), TBAAAccessInfo());
+ AccessList.emplace_back(LV);
}
- } else {
- // a scalar/builtin type
- llvm::Type *LLVMT = ConvertTypeForMem(T);
- CharUnits Align = getContext().getTypeAlignInChars(T);
- Address GEP =
- Builder.CreateInBoundsGEP(Addr, IdxList, LLVMT, Align, "gep");
- AccessList.emplace_back(GEP, nullptr);
- FlatTypes.push_back(T);
+ } else { // a scalar/builtin type
+ if (!IdxList.empty()) {
+ llvm::Type *LLVMT = ConvertTypeForMem(T);
+ CharUnits Align = getContext().getTypeAlignInChars(T);
+ Address GEP = Builder.CreateInBoundsGEP(LVal.getAddress(), IdxList,
+ LLVMT, Align, "gep");
+ AccessList.emplace_back(MakeAddrLValue(GEP, T));
+ } else // must be a bitfield we already created an lvalue for
+ AccessList.emplace_back(LVal);
}
}
}
diff --git a/clang/lib/CodeGen/CGExprAgg.cpp b/clang/lib/CodeGen/CGExprAgg.cpp
index b8150a24d45fc..07b9aebe0bbe3 100644
--- a/clang/lib/CodeGen/CGExprAgg.cpp
+++ b/clang/lib/CodeGen/CGExprAgg.cpp
@@ -488,100 +488,62 @@ static bool isTrivialFiller(Expr *E) {
return false;
}
-static void EmitHLSLAggregateSplatCast(CodeGenFunction &CGF, Address DestVal,
- QualType DestTy, llvm::Value *SrcVal,
- QualType SrcTy, SourceLocation Loc) {
+// emit an elementwise cast where the RHS is a scalar or vector
+// or emit an aggregate splat cast
+static void EmitHLSLScalarElementwiseAndSplatCasts(CodeGenFunction &CGF,
+ LValue DestVal,
+ llvm::Value *SrcVal,
+ QualType SrcTy,
+ SourceLocation Loc) {
// Flatten our destination
- SmallVector<QualType> DestTypes; // Flattened type
- SmallVector<std::pair<Address, llvm::Value *>, 16> StoreGEPList;
- // ^^ Flattened accesses to DestVal we want to store into
- CGF.FlattenAccessAndType(DestVal, DestTy, StoreGEPList, DestTypes);
-
- assert(SrcTy->isScalarType() && "Invalid HLSL Aggregate splat cast.");
- for (unsigned I = 0, Size = StoreGEPList.size(); I < Size; ++I) {
- llvm::Value *Cast =
- CGF.EmitScalarConversion(SrcVal, SrcTy, DestTypes[I], Loc);
-
- // store back
- llvm::Value *Idx = StoreGEPList[I].second;
- if (Idx) {
- llvm::Value *V =
- CGF.Builder.CreateLoad(StoreGEPList[I].first, "load.for.insert");
- Cast = CGF.Builder.CreateInsertElement(V, Cast, Idx);
- }
- CGF.Builder.CreateStore(Cast, StoreGEPList[I].first);
- }
-}
-
-// emit a flat cast where the RHS is a scalar, including vector
-static void EmitHLSLScalarFlatCast(CodeGenFunction &CGF, Address DestVal,
- QualType DestTy, llvm::Value *SrcVal,
- QualType SrcTy, SourceLocation Loc) {
- // Flatten our destination
- SmallVector<QualType, 16> DestTypes; // Flattened type
- SmallVector<std::pair<Address, llvm::Value *>, 16> StoreGEPList;
- // ^^ Flattened accesses to DestVal we want to store into
- CGF.FlattenAccessAndType(DestVal, DestTy, StoreGEPList, DestTypes);
-
- assert(SrcTy->isVectorType() && "HLSL Flat cast doesn't handle splatting.");
- const VectorType *VT = SrcTy->getAs<VectorType>();
- SrcTy = VT->getElementType();
- assert(StoreGEPList.size() <= VT->getNumElements() &&
- "Cannot perform HLSL flat cast when vector source \
- object has less elements than flattened destination \
- object.");
- for (unsigned I = 0, Size = StoreGEPList.size(); I < Size; I++) {
- llvm::Value *Load = CGF.Builder.CreateExtractElement(SrcVal, I, "vec.load");
+ SmallVector<LValue, 16> StoreList;
+ CGF.FlattenAccessAndTypeLValue(DestVal, StoreList);
+
+ bool isVector = false;
+ if (auto *VT = SrcTy->getAs<VectorType>()) {
+ isVector = true;
+ SrcTy = VT->getElementType();
+ assert(StoreList.size() <= VT->getNumElements() &&
+ "Cannot perform HLSL flat cast when vector source \
+ object has less elements than flattened destination \
+ object.");
+ }
+
+ for (unsigned I = 0, Size = StoreList.size(); I < Size; I++) {
+ LValue DestLVal = StoreList[I];
+ llvm::Value *Load =
+ isVector ? CGF.Builder.CreateExtractElement(SrcVal, I, "vec.load")
+ : SrcVal;
llvm::Value *Cast =
- CGF.EmitScalarConversion(Load, SrcTy, DestTypes[I], Loc);
-
- // store back
- llvm::Value *Idx = StoreGEPList[I].second;
- if (Idx) {
- llvm::Value *V =
- CGF.Builder.CreateLoad(StoreGEPList[I].first, "load.for.insert");
- Cast = CGF.Builder.CreateInsertElement(V, Cast, Idx);
- }
- CGF.Builder.CreateStore(Cast, StoreGEPList[I].first);
+ CGF.EmitScalarConversion(Load, SrcTy, DestLVal.getType(), Loc);
+ CGF.EmitStoreThroughLValue(RValue::get(Cast), DestLVal);
}
}
// emit a flat cast where the RHS is an aggregate
-static void EmitHLSLElementwiseCast(CodeGenFunction &CGF, Address DestVal,
- QualType DestTy, Address SrcVal,
- QualType SrcTy, SourceLocation Loc) {
+static void EmitHLSLElementwiseCast(CodeGenFunction &CGF, LValue DestVal,
+ LValue SrcVal, SourceLocation Loc) {
// Flatten our destination
- SmallVector<QualType, 16> DestTypes; // Flattened type
- SmallVector<std::pair<Address, llvm::Value *>, 16> StoreGEPList;
- // ^^ Flattened accesses to DestVal we want to store into
- CGF.FlattenAccessAndType(DestVal, DestTy, StoreGEPList, DestTypes);
+ SmallVector<LValue, 16> StoreList;
+ CGF.FlattenAccessAndTypeLValue(DestVal, StoreList);
// Flatten our src
- SmallVector<QualType, 16> SrcTypes; // Flattened type
- SmallVector<std::pair<Address, llvm::Value *>, 16> LoadGEPList;
- // ^^ Flattened accesses to SrcVal we want to load from
- CGF.FlattenAccessAndType(SrcVal, SrcTy, LoadGEPList, SrcTypes);
+ SmallVector<LValue, 16> LoadList;
+ CGF.FlattenAccessAndTypeLValue(SrcVal, LoadList);
- assert(StoreGEPList.size() <= LoadGEPList.size() &&
- "Cannot perform HLSL flat cast when flattened source object \
+ assert(StoreList.size() <= LoadList.size() &&
+ "Cannot perform HLSL elementwise cast when flattened source object \
has less elements than flattened destination object.");
- // apply casts to what we load from LoadGEPList
+ // apply casts to what we load from LoadList
// and store result in Dest
- for (unsigned I = 0, E = StoreGEPList.size(); I < E; I++) {
- llvm::Value *Idx = LoadGEPList[I].second;
- llvm::Value *Load = CGF.Builder.CreateLoad(LoadGEPList[I].first, "load");
- Load =
- Idx ? CGF.Builder.CreateExtractElement(Load, Idx, "vec.extract") : Load;
- llvm::Value *Cast =
- CGF.EmitScalarConversion(Load, SrcTypes[I], DestTypes[I], Loc);
-
- // store back
- Idx = StoreGEPList[I].second;
- if (Idx) {
- llvm::Value *V =
- CGF.Builder.CreateLoad(StoreGEPList[I].first, "load.for.insert");
- Cast = CGF.Builder.CreateInsertElement(V, Cast, Idx);
- }
- CGF.Builder.CreateStore(Cast, StoreGEPList[I].first);
+ for (unsigned I = 0, E = StoreList.size(); I < E; I++) {
+ LValue DestLVal = StoreList[I];
+ LValue SrcLVal = LoadList[I];
+ RValue RVal = CGF.EmitLoadOfLValue(SrcLVal, Loc);
+ assert(RVal.isScalar() && "All flattened source values should be scalars");
+ llvm::Value *Val = RVal.getScalarVal();
+ llvm::Value *Cast = CGF.EmitScalarConversion(Val, SrcLVal.getType(),
+ DestLVal.getType(), Loc);
+ CGF.EmitStoreThroughLValue(RValue::get(Cast), DestLVal);
}
}
@@ -988,31 +950,33 @@ void AggExprEmitter::VisitCastExpr(CastExpr *E) {
Expr *Src = E->getSubExpr();
QualType SrcTy = Src->getType();
RValue RV = CGF.EmitAnyExpr(Src);
- QualType DestTy = E->getType();
- Address DestVal = Dest.getAddress();
+ LValue DestLVal = CGF.MakeAddrLValue(Dest.getAddress(), E->getType());
SourceLocation Loc = E->getExprLoc();
- assert(RV.isScalar() && "RHS of HLSL splat cast must be a scalar.");
+ assert(RV.isScalar() && SrcTy->isScalarType() &&
+ "RHS of HLSL splat cast must be a scalar.");
llvm::Value *SrcVal = RV.getScalarVal();
- EmitHLSLAggregateSplatCast(CGF, DestVal, DestTy, SrcVal, SrcTy, Loc);
+ EmitHLSLScalarElementwiseAndSplatCasts(CGF, DestLVal, SrcVal, SrcTy, Loc);
break;
}
case CK_HLSLElementwiseCast: {
Expr *Src = E->getSubExpr();
QualType SrcTy = Src->getType();
RValue RV = CGF.EmitAnyExpr(Src);
- QualType DestTy = E->getType();
- Address DestVal = Dest.getAddress();
+ LValue DestLVal = CGF.MakeAddrLValue(Dest.getAddress(), E->getType());
SourceLocation Loc = E->getExprLoc();
if (RV.isScalar()) {
llvm::Value *SrcVal = RV.getScalarVal();
- EmitHLSLScalarFlatCast(CGF, DestVal, DestTy, SrcVal, SrcTy, Loc);
+ assert(SrcTy->isVectorType() &&
+ "HLSL Elementwise cast doesn't handle splatting.");
+ EmitHLSLScalarElementwiseAndSplatCasts(CGF, DestLVal, SrcVal, SrcTy, Loc);
} else {
assert(RV.isAggregate() &&
"Can't perform HLSL Aggregate cast on a complex type.");
Address SrcVal = RV.getAggregateAddress();
- EmitHLSLElementwiseCast(CGF, DestVal, DestTy, SrcVal, SrcTy, Loc);
+ EmitHLSLElementwiseCast(CGF, DestLVal, CGF.MakeAddrLValue(SrcVal, SrcTy),
+ Loc);
}
break;
}
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index 4fa25c5d66669..00ebf41b315bb 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -2392,39 +2392,36 @@ bool CodeGenFunction::ShouldNullCheckClassCastValue(const CastExpr *CE) {
}
// RHS is an aggregate type
-static Value *EmitHLSLElementwiseCast(CodeGenFunction &CGF, Address RHSVal,
- QualType RHSTy, QualType LHSTy,
- SourceLocation Loc) {
- SmallVector<std::pair<Address, llvm::Value *>, 16> LoadGEPList;
- SmallVector<QualType, 16> SrcTypes; // Flattened type
- CGF.FlattenAccessAndType(RHSVal, RHSTy, LoadGEPList, SrcTypes);
- // LHS is either a vector or a builtin?
+static Value *EmitHLSLElementwiseCast(CodeGenFunction &CGF, LValue SrcVal,
+ QualType DestTy, SourceLocation Loc) {
+ SmallVector<LValue, 16> LoadList;
+ CGF.FlattenAccessAndTypeLValue(SrcVal, LoadList);
+ // Dest is either a vector or a builtin?
// if its a vector create a temp alloca to store into and return that
- if (auto *VecTy = LHSTy->getAs<VectorType>()) {
- assert(SrcTypes.size() >= VecTy->getNumElements() &&
+ if (auto *VecTy = DestTy->getAs<VectorType>()) {
+ assert(LoadList.size() >= VecTy->getNumElements() &&
"Flattened type on RHS must have more elements than vector on LHS.");
llvm::Value *V =
- CGF.Builder.CreateLoad(CGF.CreateIRTemp(LHSTy, "flatcast.tmp"));
+ CGF.Builder.CreateLoad(CGF.CreateIRTemp(DestTy, "flatcast.tmp"));
// write to V.
for (unsigned I = 0, E = VecTy->getNumElements(); I < E; I++) {
- llvm::Value *Load = CGF.Builder.CreateLoad(LoadGEPList[I].first, "load");
- llvm::Value *Idx = LoadGEPList[I].second;
- Load = Idx ? CGF.Builder.CreateExtractElement(Load, Idx, "vec.extract")
- : Load;
- llvm::Value *Cast = CGF.EmitScalarConversion(
- Load, SrcTypes[I], VecTy->getElementType(), Loc);
+ RValue RVal = CGF.EmitLoadOfLValue(LoadList[I], Loc);
+ assert(RVal.isScalar() &&
+ "All flattened source values should be scalars.");
+ llvm::Value *Cast =
+ CGF.EmitScalarConversion(RVal.getScalarVal(), LoadList[I].getType(),
+ VecTy->getElementType(), Loc);
V = CGF.Builder.CreateInsertElement(V, Cast, I);
}
return V;
}
- // i its a builtin just do an extract element or load.
- assert(LHSTy->isBuiltinType() &&
+ // if its a builtin just do an extract element or load.
+ assert(DestTy->isBuiltinType() &&
"Destination type must be a vector or builtin type.");
- llvm::Value *Load = CGF.Builder.CreateLoad(LoadGEPList[0].first, "load");
- llvm::Value *Idx = LoadGEPList[0].second;
- Load =
- Idx ? CGF.Builder.CreateExtractElement(Load, Idx, "vec.extract") : Load;
- return CGF.EmitScalarConversion(Load, LHSTy, SrcTypes[0], Loc);
+ RValue RVal = CGF.EmitLoadOfLValue(LoadList[0], Loc);
+ assert(RVal.isScalar() && "All flattened source values should be scalars.");
+ return CGF.EmitScalarConversion(RVal.getScalarVal(), LoadList[0].getType(),
+ DestTy, Loc);
}
// VisitCastExpr - Emit code for an explicit or implicit cast. Implicit casts
@@ -2949,12 +2946,11 @@ Value *ScalarExprEmitter::VisitCastExpr(CastExpr *CE) {
case CK_HLSLElementwiseCast: {
RValue RV = CGF.EmitAnyExpr(E);
SourceLocation Loc = CE->getExprLoc();
- QualType SrcTy = E->getType();
assert(RV.isAggregate() && "Not a valid HLSL Elementwise Cast.");
// RHS is an aggregate
- Address SrcVal = RV.getAggregateAddress();
- return EmitHLSLElementwiseCast(CGF, SrcVal, SrcTy, DestTy, Loc);
+ LValue SrcVal = CGF.MakeAddrLValue(RV.getAggregateAddress(), E->getType());
+ return EmitHLSLElementwiseCast(CGF, SrcVal, DestTy, Loc);
}
} // end of switch
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 727487b46054f..a36aaca38b0e9 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -4463,10 +4463,8 @@ class CodeGenFunction : public CodeGenTypeCache {
AggValueSlot slot = AggValueSlot::ignored());
LValue EmitPseudoObjectLValue(const PseudoObjectExpr *e);
- void FlattenAccessAndType(
- Address Addr, QualType AddrTy,
- SmallVectorImpl<std::pair<Address, llvm::Value *>> &AccessList,
- SmallVectorImpl<QualType> &FlatTypes);
+ void FlattenAccessAndTypeLValue(LValue LVal,
+ SmallVectorImpl<LValue> &AccessList);
llvm::Value *EmitIvarOffset(const ObjCInterfaceDecl *Interface,
const ObjCIvarDecl *Ivar);
diff --git a/clang/lib/Sema/SemaHLSL.cpp b/clang/lib/Sema/SemaHLSL.cpp
index e17f9b9e8d758..3a48c9fcc7e5b 100644
--- a/clang/lib/Sema/SemaHLSL.cpp
+++ b/clang/lib/Sema/SemaHLSL.cpp
@@ -3557,9 +3557,6 @@ bool SemaHLSL::CanPerformAggregateSplatCast(Expr *Src, QualType DestTy) {
if (SrcVecTy)
SrcTy = SrcVecTy->getElementType();
- if (ContainsBitField(DestTy))
- return false;
-
llvm::SmallVector<QualType> DestTypes;
BuildFlattenedTypeList(DestTy, DestTypes);
@@ -3586,9 +3583,6 @@ bool SemaHLSL::CanPerformElementwiseCast(Expr *Src, QualType DestTy) {
(DestTy->isScalarType() || DestTy->isVectorType()))
return false;
- if (ContainsBitField(DestTy) || ContainsBitField(SrcTy))
- return false;
-
llvm::SmallVector<QualType> DestTypes;
BuildFlattenedTypeList(DestTy, DestTypes);
llvm::SmallVector<QualType> SrcTypes;
diff --git a/clang/test/CodeGenHLSL/BasicFeatures/AggregateSplatCast.hlsl b/clang/test/CodeGenHLSL/BasicFeatures/AggregateSplatCast.hlsl
index 512fcd435191a..63b2b50dd9885 100644
--- a/clang/test/CodeGenHLSL/BasicFeatures/AggregateSplatCast.hlsl
+++ b/clang/test/CodeGenHLSL/BasicFeatures/AggregateSplatCast.hlsl
@@ -85,3 +85,41 @@ export void call5() {
int1 A = {1};
S s = (S)A;
}
+
+struct BFields {
+ double D;
+ int E: 15;
+ int : 8;
+ float F;
+};
+
+struct Derived : BFields {
+ int G;
+};
+
+// derived struct with bitfields splat from scalar
+// CHECK-LABEL: call6
+// CHECK: [[AAddr:%.*]] = alloca i32, align 4
+// CHECK-NEXT: [[D:%.*]] = alloca %struct.Derived, align 1
+// CHECK-NEXT: store i32 %A, ptr [[AAddr]], align 4
+// CHECK-NEXT: [[B:%.*]] = load i32, ptr [[AAddr]], align 4
+// CHECK-NEXT: [[Gep:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 0
+// CHECK-NEXT: [[E:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep]], i32 0, i32 1
+// CHECK-NEXT: [[Gep1:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 0, i32 0
+// CHECK-NEXT: [[Gep2:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 0, i32 2
+// CHECK-NEXT: [[Gep3:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 1
+// CHECK-NEXT: [[C:%.*]] = sitofp i32 [[B]] to double
+// CHECK-NEXT: store double [[C]], ptr [[Gep1]], align 8
+// CHECK-NEXT: [[D:%.*]] = trunc i32 [[B]] to i24
+// CHECK-NEXT: [[BFL:%.*]] = load i24, ptr [[E]], align 1
+// CHECK-NEXT: [[BFV:%.*]] = and i24 [[D]], 32767
+// CHECK-NEXT: [[BFC:%.*]] = and i24 [[BFL]], -32768
+// CHECK-NEXT: [[BFS:%.*]] = or i24 [[BFC]], [[BFV]]
+// CHECK-NEXT: store i24 [[BFS]], ptr [[E]], align 1
+// CHECK-NEXT: [[C4:%.*]] = sitofp i32 [[B]] to float
+// CHECK-NEXT: store float [[C4]], ptr [[Gep2]], align 4
+// CHECK-NEXT: store i32 [[B]], ptr [[Gep3]], align 4
+// CHECK-NEXT: ret void
+export void call6(int A) {
+ Derived D = (Derived)A;
+}
diff --git a/clang/test/CodeGenHLSL/BasicFeatures/ArrayElementwiseCast.hlsl b/clang/test/CodeGenHLSL/BasicFeatures/ArrayElementwiseCast.hlsl
index ac02ddf5765ed..5f2182e27285e 100644
--- a/clang/test/CodeGenHLSL/BasicFeatures/ArrayElementwiseCast.hlsl
+++ b/clang/test/CodeGenHLSL/BasicFeatures/ArrayElementwiseCast.hlsl
@@ -10,7 +10,8 @@
// CHECK-NEXT: [[G1:%.*]] = getelementptr inbounds [2 x i32], ptr [[Tmp]], i32 0, i32 0
// CHECK-NEXT: [[G2:%.*]] = getelementptr inbounds [2 x i32], ptr [[Tmp]], i32 0, i32 1
// CHECK-NEXT: [[L:%.*]] = load i32, ptr [[G1]], align 4
-// CHECK-NEXT: store i32 [[L]], ptr [[B]], align 4
+// CHECK-NEXT: [[C:%.*]] = sitofp i32 [[L]] to float
+// CHECK-NEXT: store float [[C]], ptr [[B]], align 4
export void call0() {
int A[2] = {0,1};
float B = (float)A;
@@ -141,3 +142,46 @@ export void call7() {
int A[1] = {1};
A = (int[1])s;
}
+
+struct BFields {
+ double D;
+ int E: 15;
+ int : 8;
+ float F;
+};
+
+struct Derived : BFields {
+ int G;
+};
+
+// flatten from a derived struct with bitfields
+// CHECK-LABEL: call8
+// CHECK: [[A:%.*]] = alloca [4 x i32], align 4
+// CHECK-NEXT: [[Tmp:%.*]] = alloca %struct.Derived, align 1
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[Tmp]], ptr align 1 %D, i32 19, i1 false)
+// CHECK-NEXT: [[Gep:%.*]] = getelementptr inbounds [4 x i32], ptr [[A]], i32 0, i32 0
+// CHECK-NEXT: [[Gep1:%.*]] = getelementptr inbounds [4 x i32], ptr [[A]], i32 0, i32 1
+// CHECK-NEXT: [[Gep2:%.*]] = getelementptr inbounds [4 x i32], ptr [[A]], i32 0, i32 2
+// CHECK-NEXT: [[Gep3:%.*]] = getelementptr inbounds [4 x i32], ptr [[A]], i32 0, i32 3
+// CHECK-NEXT: [[Gep4:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0
+// CHECK-NEXT: [[E:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep4]], i32 0, i32 1
+// CHECK-NEXT: [[Gep5:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 0
+// CHECK-NEXT: [[Gep6:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 2
+// CHECK-NEXT: [[Gep7:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 1
+// CHECK-NEXT: [[Z:%.*]] = load double, ptr [[Gep5]], align 8
+// CHECK-NEXT: [[C:%.*]] = fptosi double [[Z]] to i32
+// CHECK-NEXT: store i32 [[C]], ptr [[Gep]], align 4
+// CHECK-NEXT: [[BFL:%.*]] = load i24, ptr [[E]], align 1
+// CHECK-NEXT: [[BFShl:%.*]] = shl i24 [[BFL]], 9
+// CHECK-NEXT: [[BFAshr:%.*]] = ashr i24 [[BFShl]], 9
+// CHECK-NEXT: [[BFC:%.*]] = sext i24 [[BFAshr]] to i32
+// CHECK-NEXT: store i32 [[BFC]], ptr [[Gep1]], align 4
+// CHECK-NEXT: [[Y:%.*]] = load float, ptr [[Gep6]], align 4
+// CHECK-NEXT: [[C8:%.*]] = fptosi float [[Y]] to i32
+// CHECK-NEXT: store i32 [[C8]], ptr [[Gep2]], align 4
+// CHECK-NEXT: [[X:%.*]] = load i32, ptr [[Gep7]], align 4
+// CHECK-NEXT: store i32 [[X]], ptr [[Gep3]], align 4
+// CHECK-NEXT: ret void
+export void call8(Derived D) {
+ int A[4] = (int[4])D;
+}
diff --git a/clang/test/CodeGenHLSL/BasicFeatures/StructElementwiseCast.hlsl b/clang/test/CodeGenHLSL/BasicFeatures/StructElementwiseCast.hlsl
index 81b9f5b28cc7e..39928e87c4df9 100644
--- a/clang/test/CodeGenHLSL/BasicFeatures/StructElementwiseCast.hlsl
+++ b/clang/test/CodeGenHLSL/BasicFeatures/StructElementwiseCast.hlsl
@@ -127,14 +127,121 @@ struct T {
// CHECK-NEXT: [[G1:%.*]] = getelementptr inbounds %struct.S, ptr [[s]], i32 0, i32 0
// CHECK-NEXT: [[G2:%.*]] = getelementptr inbounds %struct.S, ptr [[s]], i32 0, i32 1
// CHECK-NEXT: [[G3:%.*]] = getelementptr inbounds %struct.T, ptr [[Tmp]], i32 0, i32 0
-// CHECK-NEXT: %gep3 = getelementptr inbounds %struct.T, ptr %agg-temp, i32 0, i32 1
-// CHECK-NEXT: %gep4 = getelementptr inbounds %struct.T, ptr %agg-temp, i32 0, i32 2
-// CHECK-NEXT: %load = load i32, ptr %gep2, align 4
-// CHECK-NEXT: store i32 %load, ptr %gep, align 4
-// CHECK-NEXT: %load5 = load i32, ptr %gep3, align 4
-// CHECK-NEXT: %conv = sitofp i32 %load5 to float
-// CHECK-NEXT: store float %conv, ptr %gep1, align 4
+// CHECK-NEXT: [[G4:%.*]] = getelementptr inbounds %struct.T, ptr %agg-temp, i32 0, i32 1
+// CHECK-NEXT: [[G5:%.*]] = getelementptr inbounds %struct.T, ptr %agg-temp, i32 0, i32 2
+// CHECK-NEXT: [[L1:%.*]] = load i32, ptr [[G3]], align 4
+// CHECK-NEXT: store i32 [[L1]], ptr [[G1]], align 4
+// CHECK-NEXT: [[L2:%.*]] = load i32, ptr [[G4]], align 4
+// CHECK-NEXT: [[C:%.*]] = sitofp i32 [[L2]] to float
+// CHECK-NEXT: store float [[C]], ptr [[G2]], align 4
export void call8() {
T t = {1,2,3};
S s = (S)t;
}
+
+struct BFields {
+ double D;
+ int E: 15;
+ int : 8;
+ float F;
+};
+
+struct Derived : BFields {
+ int G;
+};
+
+// Derived Struct truncate to scalar
+// CHECK-LABEL: call9
+// CHECK: [[D2:%.*]] = alloca double, align 8
+// CHECK-NEXT: [[Tmp:%.*]] = alloca %struct.Derived, align 1
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[Tmp]], ptr align 1 %D, i32 19, i1 false)
+// CHECK-NEXT: [[Gep:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0
+// CHECK-NEXT: [[E:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep]], i32 0, i32 1
+// CHECK-NEXT: [[Gep1:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 0
+// CHECK-NEXT: [[Gep2:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 2
+// CHECK-NEXT: [[Gep3:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 1
+// CHECK-NEXT: [[A:%.*]] = load double, ptr [[Gep1]], align 8
+// CHECK-NEXT: store double [[A]], ptr [[D2]], align 8
+// CHECK-NEXT: ret void
+export void call9(Derived D) {
+ double D2 = (double)D;
+}
+
+// Derived struct from vector
+// CHECK-LABEL: call10
+// CHECK: [[IAddr:%.*]] = alloca <4 x i32>, align 16
+// CHECK-NEXT: [[D:%.*]] = alloca %struct.Derived, align 1
+// CHECK-NEXT: store <4 x i32> %I, ptr [[IAddr]], align 16
+// CHECK-NEXT: [[A:%.*]] = load <4 x i32>, ptr [[IAddr]], align 16
+// CHECK-NEXT: [[Gep:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 0
+// CHECK-NEXT: [[E:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep]], i32 0, i32 1
+// CHECK-NEXT: [[Gep1:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 0, i32 0
+// CHECK-NEXT: [[Gep2:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 0, i32 2
+// CHECK-NEXT: [[Gep3:%.*]] = getelementptr inbounds %struct.Derived, ptr [[D]], i32 0, i32 1
+// CHECK-NEXT: [[VL:%.*]] = extractelement <4 x i32> [[A]], i64 0
+// CHECK-NEXT: [[C:%.*]] = sitofp i32 [[VL]] to double
+// CHECK-NEXT: store double [[C]], ptr [[Gep1]], align 8
+// CHECK-NEXT: [[VL4:%.*]] = extractelement <4 x i32> [[A]], i64 1
+// CHECK-NEXT: [[B:%.*]] = trunc i32 [[VL4]] to i24
+// CHECK-NEXT: [[BFL:%.*]] = load i24, ptr [[E]], align 1
+// CHECK-NEXT: [[BFV:%.*]] = and i24 [[B]], 32767
+// CHECK-NEXT: [[BFC:%.*]] = and i24 [[BFL]], -32768
+// CHECK-NEXT: [[BFSet:%.*]] = or i24 [[BFC]], [[BFV]]
+// CHECK-NEXT: store i24 [[BFSet]], ptr [[E]], align 1
+// CHECK-NEXT: [[VL5:%.*]] = extractelement <4 x i32> [[A]], i64 2
+// CHECK-NEXT: [[C6:%.*]] = sitofp i32 [[VL5]] to float
+// CHECK-NEXT: store float [[C6]], ptr [[Gep2]], align 4
+// CHECK-NEXT: [[VL7:%.*]] = extractelement <4 x i32> [[A]], i64 3
+// CHECK-NEXT: store i32 [[VL7]], ptr [[Gep3]], align 4
+// CHECK-NEXT: ret void
+export void call10(int4 I) {
+ Derived D = (Derived)I;
+}
+
+// truncate derived struct
+// CHECK-LABEL: call11
+// CHECK: [[B:%.*]] = alloca %struct.BFields, align 1
+// CHECK-NEXT: [[Tmp:%.*]] = alloca %struct.Derived, align 1
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[Tmp]], ptr align 1 [[D]], i32 19, i1 false)
+// CHECK-NEXT: [[Gep:%.*]] = getelementptr inbounds %struct.BFields, ptr [[B]], i32 0
+// CHECK-NEXT: [[E:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep]], i32 0, i32 1
+// CHECK-NEXT: [[Gep1:%.*]] = getelementptr inbounds %struct.BFields, ptr [[B]], i32 0, i32 0
+// CHECK-NEXT: [[Gep2:%.*]] = getelementptr inbounds %struct.BFields, ptr [[B]], i32 0, i32 2
+// CHECK-NEXT: [[Gep3:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0
+// CHECK-NEXT: [[E4:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep3]], i32 0, i32 1
+// CHECK-NEXT: [[Gep5:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 0
+// CHECK-NEXT: [[Gep6:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 2
+// CHECK-NEXT: [[Gep7:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 1
+// CHECK-NEXT: [[A:%.*]] = load double, ptr [[Gep5]], align 8
+// CHECK-NEXT: store double [[A]], ptr [[Gep1]], align 8
+// CHECK-NEXT: [[BFl:%.*]] = load i24, ptr [[E4]], align 1
+// CHECK-NEXT: [[Shl:%.*]] = shl i24 [[BFL]], 9
+// CHECK-NEXT: [[Ashr:%.*]] = ashr i24 [[Shl]], 9
+// CHECK-NEXT: [[BFC:%.*]] = sext i24 [[Ashr]] to i32
+// CHECK-NEXT: [[B:%.*]] = trunc i32 [[BFC]] to i24
+// CHECK-NEXT: [[BFL8:%.*]] = load i24, ptr [[E]], align 1
+// CHECK-NEXT: [[BFV:%.*]] = and i24 [[B]], 32767
+// CHECK-NEXT: [[BFC:%.*]] = and i24 [[BFL8]], -32768
+// CHECK-NEXT: [[BFSet:%.*]] = or i24 [[BFC]], [[BFV]]
+// CHECK-NEXT: store i24 [[BFSet]], ptr [[E]], align 1
+// CHECK-NEXT: [[C:%.*]] = load float, ptr [[Gep6]], align 4
+// CHECK-NEXT: store float [[C]], ptr [[Gep2]], align 4
+// CHECK-NEXT: ret void
+export void call11(Derived D) {
+ BFields B = (BFields)D;
+}
+
+struct Empty {
+};
+
+// cast to an empty struct
+// CHECK-LABEL: call12
+// CHECK: [[I:%.*]] = alloca <4 x i32>, align 16
+// CHECK-NEXT: [[E:%.*]] = alloca %struct.Empty, align 1
+// CHECK-NEXT: store <4 x i32> <i32 1, i32 2, i32 3, i32 4>, ptr [[I]], align 16
+// CHECK-NEXT: [[A:%.*]] = load <4 x i32>, ptr [[I]], align 16
+// CHECK-NEXt: ret void
+export void call12() {
+ int4 I = {1,2,3,4};
+ Empty E = (Empty)I;
+}
diff --git a/clang/test/CodeGenHLSL/BasicFeatures/VectorElementwiseCast.hlsl b/clang/test/CodeGenHLSL/BasicFeatures/VectorElementwiseCast.hlsl
index 253b38a7ca072..26aa41aaf4626 100644
--- a/clang/test/CodeGenHLSL/BasicFeatures/VectorElementwiseCast.hlsl
+++ b/clang/test/CodeGenHLSL/BasicFeatures/VectorElementwiseCast.hlsl
@@ -79,3 +79,45 @@ export void call5() {
S s = {1, 2.0};
int A = (int)s;
}
+
+struct BFields {
+ double D;
+ int E: 15;
+ int : 8;
+ float F;
+};
+
+struct Derived : BFields {
+ int G;
+};
+
+// vector flat cast from derived struct with bitfield
+// CHECK-LABEL: call6
+// CHECK: [[A:%.*]] = alloca <4 x i32>, align 16
+// CHECK-NEXT: [[Tmp:%.*]] = alloca %struct.Derived, align 1
+// CHECK-NEXT: [[FlatTmp:%.*]] = alloca <4 x i32>, align 16
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[Tmp]], ptr align 1 %D, i32 19, i1 false)
+// CHECK-NEXT: [[Gep:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0
+// CHECK-NEXT: [[E:%.*]] = getelementptr inbounds nuw %struct.BFields, ptr [[Gep]], i32 0, i32 1
+// CHECK-NEXT: [[Gep1:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 0
+// CHECK-NEXT: [[Gep2:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 0, i32 2
+// CHECK-NEXT: [[Gep3:%.*]] = getelementptr inbounds %struct.Derived, ptr [[Tmp]], i32 0, i32 1
+// CHECK-NEXT: [[Z:%.*]] = load <4 x i32>, ptr [[FlatTmp]], align 16
+// CHECK-NEXT: [[Y:%.*]] = load double, ptr [[Gep1]], align 8
+// CHECK-NEXT: [[C:%.*]] = fptosi double [[Y]] to i32
+// CHECK-NEXT: [[X:%.*]] = insertelement <4 x i32> [[Z]], i32 [[C]], i64 0
+// CHECK-NEXT: [[BFL:%.*]] = load i24, ptr [[E]], align 1
+// CHECK-NEXT: [[BFShl:%.*]] = shl i24 [[BFL]], 9
+// CHECK-NEXT: [[BFAshr:%.*]] = ashr i24 [[BFShl]], 9
+// CHECK-NEXT: [[BFC:%.*]] = sext i24 [[BFAshr]] to i32
+// CHECK-NEXT: [[W:%.*]] = insertelement <4 x i32> [[X]], i32 [[BFC]], i64 1
+// CHECK-NEXT: [[V:%.*]] = load float, ptr [[Gep2]], align 4
+// CHECK-NEXT: [[C4:%.*]] = fptosi float [[V]] to i32
+// CHECK-NEXT: [[U:%.*]] = insertelement <4 x i32> [[W]], i32 [[C4]], i64 2
+// CHECK-NEXT: [[T:%.*]] = load i32, ptr [[Gep3]], align 4
+// CHECK-NEXT: [[S:%.*]] = insertelement <4 x i32> [[U]], i32 [[T]], i64 3
+// CHECK-NEXT: store <4 x i32> [[S]], ptr [[A]], align 16
+// CHECK-NEXT: ret void
+export void call6(Derived D) {
+ int4 A = (int4)D;
+}
diff --git a/clang/test/SemaHLSL/Language/AggregateSplatCast-errors.hlsl b/clang/test/SemaHLSL/Language/AggregateSplatCast-errors.hlsl
index 2320e136b2536..fbb47bd2e7d39 100644
--- a/clang/test/SemaHLSL/Language/AggregateSplatCast-errors.hlsl
+++ b/clang/test/SemaHLSL/Language/AggregateSplatCast-errors.hlsl
@@ -13,12 +13,6 @@ struct R {
};
};
-// casting types which contain bitfields is not yet supported.
-export void cantCast() {
- S s = (S)1;
- // expected-error at -1 {{no matching conversion for C-style cast from 'int' to 'S'}}
-}
-
// Can't cast a union
export void cantCast2() {
R r = (R)1;
diff --git a/clang/test/SemaHLSL/Language/ElementwiseCast-errors.hlsl b/clang/test/SemaHLSL/Language/ElementwiseCast-errors.hlsl
index 30591507b3260..d9f50e9b0307f 100644
--- a/clang/test/SemaHLSL/Language/ElementwiseCast-errors.hlsl
+++ b/clang/test/SemaHLSL/Language/ElementwiseCast-errors.hlsl
@@ -7,27 +7,6 @@ export void cantCast() {
// expected-error at -1 {{C-style cast from 'int[3]' to 'int[4]' is not allowed}}
}
-struct S {
-// expected-note at -1 {{candidate constructor (the implicit copy constructor) not viable: no known conversion from 'int2' (aka 'vector<int, 2>') to 'const S' for 1st argument}}
-// expected-note at -2 {{candidate constructor (the implicit move constructor) not viable: no known conversion from 'int2' (aka 'vector<int, 2>') to 'S' for 1st argument}}
-// expected-note at -3 {{candidate constructor (the implicit default constructor) not viable: requires 0 arguments, but 1 was provided}}
- int A : 8;
- int B;
-};
-
-// casting types which contain bitfields is not yet supported.
-export void cantCast2() {
- S s = {1,2};
- int2 C = (int2)s;
- // expected-error at -1 {{cannot convert 'S' to 'int2' (aka 'vector<int, 2>') without a conversion operator}}
-}
-
-export void cantCast3() {
- int2 C = {1,2};
- S s = (S)C;
- // expected-error at -1 {{no matching conversion for C-style cast from 'int2' (aka 'vector<int, 2>') to 'S'}}
-}
-
struct R {
// expected-note at -1 {{candidate constructor (the implicit copy constructor) not viable: no known conversion from 'int2' (aka 'vector<int, 2>') to 'const R' for 1st argument}}
// expected-note at -2 {{candidate constructor (the implicit move constructor) not viable: no known conversion from 'int2' (aka 'vector<int, 2>') to 'R' for 1st argument}}
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