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[HLSL] Add RWBuffer::Load(Index) #117018

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Merged
merged 3 commits into from
Dec 16, 2024
Merged

[HLSL] Add RWBuffer::Load(Index) #117018

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d20e098
[HLSL] Add RWBuffer::Load(Index)
bogner Nov 19, 2024
579d984
fixup: clang-format
bogner Nov 20, 2024
957034e
fixup: Add TODO
bogner Dec 13, 2024
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15 changes: 15 additions & 0 deletions clang/lib/Sema/HLSLExternalSemaSource.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -191,6 +191,19 @@ class BuiltinTypeDeclBuilder {
return *this;
}

BuiltinTypeDeclBuilder &addLoadMethods() {
if (Record->isCompleteDefinition())
return *this;

ASTContext &AST = Record->getASTContext();
IdentifierInfo &II = AST.Idents.get("Load", tok::TokenKind::identifier);
DeclarationName Load(&II);
// TODO: We also need versions with status for CheckAccessFullyMapped.
addHandleAccessFunction(Load, /*IsConst=*/false, /*IsRef=*/false);

return *this;
}

FieldDecl *getResourceHandleField() {
auto I = Fields.find("__handle");
assert(I != Fields.end() &&
Expand Down Expand Up @@ -921,6 +934,7 @@ void HLSLExternalSemaSource::defineHLSLTypesWithForwardDeclarations() {
ResourceKind::TypedBuffer, /*IsROV=*/false,
/*RawBuffer=*/false)
.addArraySubscriptOperators()
.addLoadMethods()
.completeDefinition();
});

Expand All @@ -933,6 +947,7 @@ void HLSLExternalSemaSource::defineHLSLTypesWithForwardDeclarations() {
ResourceKind::TypedBuffer, /*IsROV=*/true,
/*RawBuffer=*/false)
.addArraySubscriptOperators()
.addLoadMethods()
.completeDefinition();
});

Expand Down
15 changes: 15 additions & 0 deletions clang/test/AST/HLSL/TypedBuffers-AST.hlsl
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Expand Up @@ -87,6 +87,21 @@ RESOURCE<float> Buffer;
// CHECK-NEXT: DeclRefExpr 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> 'unsigned int' ParmVar 0x{{[0-9A-Fa-f]+}} 'Index' 'unsigned int'
// CHECK-NEXT: AlwaysInlineAttr 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> Implicit always_inline

// CHECK-NEXT: CXXMethodDecl 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> <invalid sloc> Load 'element_type (unsigned int)'
// CHECK-NEXT: ParmVarDecl 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> <invalid sloc> Index 'unsigned int'
// CHECK-NEXT: CompoundStmt 0x{{[0-9A-Fa-f]+}} <<invalid sloc>>
// CHECK-NEXT: ReturnStmt 0x{{[0-9A-Fa-f]+}} <<invalid sloc>>
// CHECK-NEXT: UnaryOperator 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> 'element_type' prefix '*' cannot overflow
// CHECK-NEXT: CallExpr 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> 'element_type *'
// CHECK-NEXT: DeclRefExpr 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> '<builtin fn type>' Function 0x{{[0-9A-Fa-f]+}} '__builtin_hlsl_resource_getpointer' 'void (...) noexcept'
// CHECK-NEXT: MemberExpr 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> '__hlsl_resource_t
// CHECK-SAME{LITERAL}: [[hlsl::resource_class(UAV)]]
// CHECK-SAME{LITERAL}: [[hlsl::contained_type(element_type)]]
// CHECK-SAME: ' lvalue .__handle 0x{{[0-9A-Fa-f]+}}
// CHECK-NEXT: CXXThisExpr 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> '[[RESOURCE]]<element_type>' lvalue implicit this
// CHECK-NEXT: DeclRefExpr 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> 'unsigned int' ParmVar 0x{{[0-9A-Fa-f]+}} 'Index' 'unsigned int'
// CHECK-NEXT: AlwaysInlineAttr 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> Implicit always_inline

// CHECK: ClassTemplateSpecializationDecl 0x{{[0-9A-Fa-f]+}} <<invalid sloc>> <invalid sloc> class [[RESOURCE]] definition

// CHECK: TemplateArgument type 'float'
Expand Down
7 changes: 7 additions & 0 deletions clang/test/CodeGenHLSL/builtins/RWBuffer-subscript.hlsl
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Expand Up @@ -6,9 +6,16 @@ RWBuffer<int> Out;
[numthreads(1,1,1)]
void main(unsigned GI : SV_GroupIndex) {
// CHECK: define void @main()

// CHECK: %[[INPTR:.*]] = call noundef nonnull align 4 dereferenceable(4) ptr @llvm.dx.resource.getpointer.p0.tdx.TypedBuffer_i32_1_0_1t(target("dx.TypedBuffer", i32, 1, 0, 1) %{{.*}}, i32 %{{.*}})
// CHECK: %[[LOAD:.*]] = load i32, ptr %[[INPTR]]
// CHECK: %[[OUTPTR:.*]] = call noundef nonnull align 4 dereferenceable(4) ptr @llvm.dx.resource.getpointer.p0.tdx.TypedBuffer_i32_1_0_1t(target("dx.TypedBuffer", i32, 1, 0, 1) %{{.*}}, i32 %{{.*}})
// CHECK: store i32 %[[LOAD]], ptr %[[OUTPTR]]
Out[GI] = In[GI];

// CHECK: %[[INPTR:.*]] = call ptr @llvm.dx.resource.getpointer.p0.tdx.TypedBuffer_i32_1_0_1t(target("dx.TypedBuffer", i32, 1, 0, 1) %{{.*}}, i32 %{{.*}})
// CHECK: %[[LOAD:.*]] = load i32, ptr %[[INPTR]]
// CHECK: %[[OUTPTR:.*]] = call noundef nonnull align 4 dereferenceable(4) ptr @llvm.dx.resource.getpointer.p0.tdx.TypedBuffer_i32_1_0_1t(target("dx.TypedBuffer", i32, 1, 0, 1) %{{.*}}, i32 %{{.*}})
// CHECK: store i32 %[[LOAD]], ptr %[[OUTPTR]]
Out[GI] = In.Load(GI);
}
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