1/*
2 * Copyright (C) 2019 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "WHLSLGatherEntryPointItems.h"
28
29#if ENABLE(WEBGPU)
30
31#include "WHLSLArrayReferenceType.h"
32#include "WHLSLArrayType.h"
33#include "WHLSLFunctionDefinition.h"
34#include "WHLSLInferTypes.h"
35#include "WHLSLIntrinsics.h"
36#include "WHLSLPointerType.h"
37#include "WHLSLStructureDefinition.h"
38#include "WHLSLTypeDefinition.h"
39#include "WHLSLTypeReference.h"
40#include "WHLSLVariableDeclaration.h"
41#include "WHLSLVisitor.h"
42#include <wtf/Optional.h>
43
44namespace WebCore {
45
46namespace WHLSL {
47
48class Gatherer : public Visitor {
49public:
50 Gatherer(const Intrinsics& intrinsics, AST::Semantic* semantic = nullptr)
51 : m_intrinsics(intrinsics)
52 , m_currentSemantic(semantic)
53 {
54 }
55
56 virtual ~Gatherer() = default;
57
58 void reset()
59 {
60 m_currentSemantic = nullptr;
61 }
62
63 Vector<EntryPointItem>&& takeEntryPointItems()
64 {
65 return WTFMove(m_entryPointItems);
66 }
67
68 void visit(AST::EnumerationDefinition&)
69 {
70 if (!m_currentSemantic) {
71 setError();
72 return;
73 }
74 m_entryPointItems.append(EntryPointItem(m_typeReferences.last().get(), *m_currentSemantic, m_path));
75 }
76
77 void visit(AST::NativeTypeDeclaration& nativeTypeDeclaration)
78 {
79 if (!m_currentSemantic) {
80 setError();
81 return;
82 }
83 if (matches(nativeTypeDeclaration, m_intrinsics.voidType())) {
84 setError();
85 return;
86 }
87
88 m_entryPointItems.append(EntryPointItem(m_typeReferences.last().get(), *m_currentSemantic, m_path));
89 }
90
91 void visit(AST::StructureDefinition& structureDefinition)
92 {
93 if (m_currentSemantic) {
94 setError();
95 return;
96 }
97
98 for (auto& structureElement : structureDefinition.structureElements()) {
99 if (structureElement.semantic())
100 m_currentSemantic = &*structureElement.semantic();
101 m_path.append(structureElement.name());
102 checkErrorAndVisit(structureElement);
103 m_path.takeLast();
104 }
105 }
106
107 void visit(AST::TypeDefinition& typeDefinition)
108 {
109 checkErrorAndVisit(typeDefinition.type());
110 }
111
112 void visit(AST::TypeReference& typeReference)
113 {
114 ASSERT(typeReference.resolvedType());
115 m_typeReferences.append(typeReference);
116 auto depth = m_typeReferences.size();
117 checkErrorAndVisit(*typeReference.resolvedType());
118 ASSERT_UNUSED(depth, m_typeReferences.size() == depth);
119 m_typeReferences.removeLast();
120 }
121
122 void visit(AST::PointerType& pointerType)
123 {
124 if (!m_currentSemantic) {
125 setError();
126 return;
127 }
128 m_entryPointItems.append(EntryPointItem(pointerType, *m_currentSemantic, m_path));
129 }
130
131 void visit(AST::ArrayReferenceType& arrayReferenceType)
132 {
133 if (!m_currentSemantic) {
134 setError();
135 return;
136 }
137 m_entryPointItems.append(EntryPointItem(arrayReferenceType, *m_currentSemantic, m_path));
138 }
139
140 void visit(AST::ArrayType& arrayType)
141 {
142 if (!m_currentSemantic) {
143 setError();
144 return;
145 }
146 m_entryPointItems.append(EntryPointItem(arrayType, *m_currentSemantic, m_path));
147 }
148
149 void visit(AST::VariableDeclaration& variableDeclaration)
150 {
151 ASSERT(!m_currentSemantic);
152 if (variableDeclaration.semantic())
153 m_currentSemantic = &*variableDeclaration.semantic();
154 ASSERT(variableDeclaration.type());
155 m_path.append(variableDeclaration.name());
156 checkErrorAndVisit(*variableDeclaration.type());
157 m_path.takeLast();
158 }
159
160private:
161 Vector<String> m_path;
162 const Intrinsics& m_intrinsics;
163 AST::Semantic* m_currentSemantic { nullptr };
164 Vector<std::reference_wrapper<AST::TypeReference>> m_typeReferences;
165 Vector<EntryPointItem> m_entryPointItems;
166};
167
168Optional<EntryPointItems> gatherEntryPointItems(const Intrinsics& intrinsics, AST::FunctionDefinition& functionDefinition)
169{
170 ASSERT(functionDefinition.entryPointType());
171 Gatherer inputGatherer(intrinsics);
172 for (auto& parameter : functionDefinition.parameters()) {
173 inputGatherer.reset();
174 inputGatherer.checkErrorAndVisit(parameter);
175 if (inputGatherer.error())
176 return WTF::nullopt;
177 }
178 Gatherer outputGatherer(intrinsics, functionDefinition.semantic() ? &*functionDefinition.semantic() : nullptr);
179 outputGatherer.checkErrorAndVisit(functionDefinition.type());
180 if (outputGatherer.error())
181 return WTF::nullopt;
182
183 return {{ inputGatherer.takeEntryPointItems(), outputGatherer.takeEntryPointItems() }};
184}
185
186} // namespace WHLSL
187
188} // namespace WebCore
189
190#endif // ENABLE(WEBGPU)
191