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comparison clang/unittests/CodeGen/CodeGenExternalTest.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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children 0572611fdcc8
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147:c2174574ed3a 150:1d019706d866
1 //===- unittests/CodeGen/CodeGenExternalTest.cpp - test external CodeGen -===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "clang/AST/ASTConsumer.h"
10 #include "clang/AST/ASTContext.h"
11 #include "clang/AST/GlobalDecl.h"
12 #include "clang/AST/RecursiveASTVisitor.h"
13 #include "clang/Basic/TargetInfo.h"
14 #include "clang/CodeGen/CodeGenABITypes.h"
15 #include "clang/CodeGen/ModuleBuilder.h"
16 #include "clang/Frontend/CompilerInstance.h"
17 #include "clang/Lex/Preprocessor.h"
18 #include "clang/Parse/ParseAST.h"
19 #include "clang/Sema/Sema.h"
20 #include "llvm/ADT/Triple.h"
21 #include "llvm/IR/Instructions.h"
22 #include "llvm/IR/LLVMContext.h"
23 #include "llvm/Support/Debug.h"
24 #include "llvm/Support/Host.h"
25 #include "llvm/Support/MemoryBuffer.h"
26 #include "gtest/gtest.h"
27
28 using namespace llvm;
29 using namespace clang;
30
31 namespace {
32
33 // Mocks up a language using Clang code generation as a library and
34 // tests some basic functionality there.
35 // - CodeGen->GetAddrOfGlobal
36 // - CodeGen::convertTypeForMemory
37 // - CodeGen::getLLVMFieldNumber
38
39 static const bool DebugThisTest = false;
40
41 // forward declarations
42 struct MyASTConsumer;
43 static void test_codegen_fns(MyASTConsumer *my);
44 static bool test_codegen_fns_ran;
45
46 // This forwards the calls to the Clang CodeGenerator
47 // so that we can test CodeGen functions while it is open.
48 // It accumulates toplevel decls in HandleTopLevelDecl and
49 // calls test_codegen_fns() in HandleTranslationUnit
50 // before forwarding that function to the CodeGenerator.
51
52 struct MyASTConsumer : public ASTConsumer {
53 std::unique_ptr<CodeGenerator> Builder;
54 std::vector<Decl*> toplevel_decls;
55
56 MyASTConsumer(std::unique_ptr<CodeGenerator> Builder_in)
57 : ASTConsumer(), Builder(std::move(Builder_in))
58 {
59 }
60
61 ~MyASTConsumer() { }
62
63 void Initialize(ASTContext &Context) override;
64 void HandleCXXStaticMemberVarInstantiation(VarDecl *VD) override;
65 bool HandleTopLevelDecl(DeclGroupRef D) override;
66 void HandleInlineFunctionDefinition(FunctionDecl *D) override;
67 void HandleInterestingDecl(DeclGroupRef D) override;
68 void HandleTranslationUnit(ASTContext &Ctx) override;
69 void HandleTagDeclDefinition(TagDecl *D) override;
70 void HandleTagDeclRequiredDefinition(const TagDecl *D) override;
71 void HandleCXXImplicitFunctionInstantiation(FunctionDecl *D) override;
72 void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) override;
73 void HandleImplicitImportDecl(ImportDecl *D) override;
74 void CompleteTentativeDefinition(VarDecl *D) override;
75 void AssignInheritanceModel(CXXRecordDecl *RD) override;
76 void HandleVTable(CXXRecordDecl *RD) override;
77 ASTMutationListener *GetASTMutationListener() override;
78 ASTDeserializationListener *GetASTDeserializationListener() override;
79 void PrintStats() override;
80 bool shouldSkipFunctionBody(Decl *D) override;
81 };
82
83 void MyASTConsumer::Initialize(ASTContext &Context) {
84 Builder->Initialize(Context);
85 }
86
87 bool MyASTConsumer::HandleTopLevelDecl(DeclGroupRef DG) {
88
89 for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I) {
90 toplevel_decls.push_back(*I);
91 }
92
93 return Builder->HandleTopLevelDecl(DG);
94 }
95
96 void MyASTConsumer::HandleInlineFunctionDefinition(FunctionDecl *D) {
97 Builder->HandleInlineFunctionDefinition(D);
98 }
99
100 void MyASTConsumer::HandleInterestingDecl(DeclGroupRef D) {
101 Builder->HandleInterestingDecl(D);
102 }
103
104 void MyASTConsumer::HandleTranslationUnit(ASTContext &Context) {
105 test_codegen_fns(this);
106 // HandleTranslationUnit can close the module
107 Builder->HandleTranslationUnit(Context);
108 }
109
110 void MyASTConsumer::HandleTagDeclDefinition(TagDecl *D) {
111 Builder->HandleTagDeclDefinition(D);
112 }
113
114 void MyASTConsumer::HandleTagDeclRequiredDefinition(const TagDecl *D) {
115 Builder->HandleTagDeclRequiredDefinition(D);
116 }
117
118 void MyASTConsumer::HandleCXXImplicitFunctionInstantiation(FunctionDecl *D) {
119 Builder->HandleCXXImplicitFunctionInstantiation(D);
120 }
121
122 void MyASTConsumer::HandleTopLevelDeclInObjCContainer(DeclGroupRef D) {
123 Builder->HandleTopLevelDeclInObjCContainer(D);
124 }
125
126 void MyASTConsumer::HandleImplicitImportDecl(ImportDecl *D) {
127 Builder->HandleImplicitImportDecl(D);
128 }
129
130 void MyASTConsumer::CompleteTentativeDefinition(VarDecl *D) {
131 Builder->CompleteTentativeDefinition(D);
132 }
133
134 void MyASTConsumer::AssignInheritanceModel(CXXRecordDecl *RD) {
135 Builder->AssignInheritanceModel(RD);
136 }
137
138 void MyASTConsumer::HandleCXXStaticMemberVarInstantiation(VarDecl *VD) {
139 Builder->HandleCXXStaticMemberVarInstantiation(VD);
140 }
141
142 void MyASTConsumer::HandleVTable(CXXRecordDecl *RD) {
143 Builder->HandleVTable(RD);
144 }
145
146 ASTMutationListener *MyASTConsumer::GetASTMutationListener() {
147 return Builder->GetASTMutationListener();
148 }
149
150 ASTDeserializationListener *MyASTConsumer::GetASTDeserializationListener() {
151 return Builder->GetASTDeserializationListener();
152 }
153
154 void MyASTConsumer::PrintStats() {
155 Builder->PrintStats();
156 }
157
158 bool MyASTConsumer::shouldSkipFunctionBody(Decl *D) {
159 return Builder->shouldSkipFunctionBody(D);
160 }
161
162 const char TestProgram[] =
163 "struct mytest_struct { char x; short y; char p; long z; };\n"
164 "int mytest_fn(int x) { return x; }\n";
165
166 // This function has the real test code here
167 static void test_codegen_fns(MyASTConsumer *my) {
168
169 bool mytest_fn_ok = false;
170 bool mytest_struct_ok = false;
171
172 CodeGen::CodeGenModule &CGM = my->Builder->CGM();
173
174 for (auto decl : my->toplevel_decls ) {
175 if (FunctionDecl *fd = dyn_cast<FunctionDecl>(decl)) {
176 if (fd->getName() == "mytest_fn") {
177 Constant *c = my->Builder->GetAddrOfGlobal(GlobalDecl(fd), false);
178 // Verify that we got a function.
179 ASSERT_TRUE(c != NULL);
180 if (DebugThisTest) {
181 c->print(dbgs(), true);
182 dbgs() << "\n";
183 }
184 mytest_fn_ok = true;
185 }
186 } else if(clang::RecordDecl *rd = dyn_cast<RecordDecl>(decl)) {
187 if (rd->getName() == "mytest_struct") {
188 RecordDecl *def = rd->getDefinition();
189 ASSERT_TRUE(def != NULL);
190 const clang::Type *clangTy = rd->getCanonicalDecl()->getTypeForDecl();
191 ASSERT_TRUE(clangTy != NULL);
192 QualType qType = clangTy->getCanonicalTypeInternal();
193
194 // Check convertTypeForMemory
195 llvm::Type *llvmTy = CodeGen::convertTypeForMemory(CGM, qType);
196 ASSERT_TRUE(llvmTy != NULL);
197 if (DebugThisTest) {
198 llvmTy->print(dbgs(), true);
199 dbgs() << "\n";
200 }
201
202 llvm::CompositeType* structTy = dyn_cast<CompositeType>(llvmTy);
203 ASSERT_TRUE(structTy != NULL);
204
205 // Check getLLVMFieldNumber
206 FieldDecl *xField = NULL;
207 FieldDecl *yField = NULL;
208 FieldDecl *zField = NULL;
209
210 for (auto field : rd->fields()) {
211 if (field->getName() == "x") xField = field;
212 if (field->getName() == "y") yField = field;
213 if (field->getName() == "z") zField = field;
214 }
215
216 ASSERT_TRUE(xField != NULL);
217 ASSERT_TRUE(yField != NULL);
218 ASSERT_TRUE(zField != NULL);
219
220 unsigned x = CodeGen::getLLVMFieldNumber(CGM, rd, xField);
221 unsigned y = CodeGen::getLLVMFieldNumber(CGM, rd, yField);
222 unsigned z = CodeGen::getLLVMFieldNumber(CGM, rd, zField);
223
224 ASSERT_NE(x, y);
225 ASSERT_NE(y, z);
226
227 llvm::Type* xTy = structTy->getTypeAtIndex(x);
228 llvm::Type* yTy = structTy->getTypeAtIndex(y);
229 llvm::Type* zTy = structTy->getTypeAtIndex(z);
230
231 ASSERT_TRUE(xTy != NULL);
232 ASSERT_TRUE(yTy != NULL);
233 ASSERT_TRUE(zTy != NULL);
234
235 if (DebugThisTest) {
236 xTy->print(dbgs(), true);
237 dbgs() << "\n";
238 yTy->print(dbgs(), true);
239 dbgs() << "\n";
240 zTy->print(dbgs(), true);
241 dbgs() << "\n";
242 }
243
244 ASSERT_GE(xTy->getPrimitiveSizeInBits(), 1u);
245 ASSERT_GE(yTy->getPrimitiveSizeInBits(), 16u); // short is at least 16b
246 ASSERT_GE(zTy->getPrimitiveSizeInBits(), 32u); // long is at least 32b
247
248 mytest_struct_ok = true;
249 }
250 }
251 }
252
253 ASSERT_TRUE(mytest_fn_ok);
254 ASSERT_TRUE(mytest_struct_ok);
255
256 test_codegen_fns_ran = true;
257 }
258
259 TEST(CodeGenExternalTest, CodeGenExternalTest) {
260 LLVMContext Context;
261 CompilerInstance compiler;
262
263 compiler.createDiagnostics();
264 compiler.getLangOpts().CPlusPlus = 1;
265 compiler.getLangOpts().CPlusPlus11 = 1;
266
267 compiler.getTargetOpts().Triple = llvm::Triple::normalize(
268 llvm::sys::getProcessTriple());
269 compiler.setTarget(clang::TargetInfo::CreateTargetInfo(
270 compiler.getDiagnostics(),
271 std::make_shared<clang::TargetOptions>(
272 compiler.getTargetOpts())));
273
274 compiler.createFileManager();
275 compiler.createSourceManager(compiler.getFileManager());
276 compiler.createPreprocessor(clang::TU_Prefix);
277
278 compiler.createASTContext();
279
280
281 compiler.setASTConsumer(std::unique_ptr<ASTConsumer>(
282 new MyASTConsumer(std::unique_ptr<CodeGenerator>(
283 CreateLLVMCodeGen(compiler.getDiagnostics(),
284 "MemoryTypesTest",
285 compiler.getHeaderSearchOpts(),
286 compiler.getPreprocessorOpts(),
287 compiler.getCodeGenOpts(),
288 Context)))));
289
290 compiler.createSema(clang::TU_Prefix, nullptr);
291
292 clang::SourceManager &sm = compiler.getSourceManager();
293 sm.setMainFileID(sm.createFileID(
294 llvm::MemoryBuffer::getMemBuffer(TestProgram), clang::SrcMgr::C_User));
295
296 clang::ParseAST(compiler.getSema(), false, false);
297
298 ASSERT_TRUE(test_codegen_fns_ran);
299 }
300
301 } // end anonymous namespace