1 /**
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "callExpression.h"
17
18 #include <compiler/core/pandagen.h>
19 #include <typescript/checker.h>
20 #include <ir/base/classDefinition.h>
21 #include <ir/base/scriptFunction.h>
22 #include <ir/base/spreadElement.h>
23 #include <ir/expressions/chainExpression.h>
24 #include <ir/expressions/memberExpression.h>
25 #include <ir/ts/tsAsExpression.h>
26 #include <ir/ts/tsNonNullExpression.h>
27 #include <ir/ts/tsTypeAssertion.h>
28 #include <ir/ts/tsTypeParameterInstantiation.h>
29
30 namespace panda::es2panda::ir {
31
Iterate(const NodeTraverser & cb) const32 void CallExpression::Iterate(const NodeTraverser &cb) const
33 {
34 cb(callee_);
35
36 if (typeParams_) {
37 cb(typeParams_);
38 }
39
40 for (auto *it : arguments_) {
41 cb(it);
42 }
43 }
44
Dump(ir::AstDumper * dumper) const45 void CallExpression::Dump(ir::AstDumper *dumper) const
46 {
47 dumper->Add({{"type", "CallExpression"},
48 {"callee", callee_},
49 {"arguments", arguments_},
50 {"optional", optional_},
51 {"typeParameters", AstDumper::Optional(typeParams_)}});
52 }
53
CreateSpreadArguments(compiler::PandaGen * pg) const54 compiler::VReg CallExpression::CreateSpreadArguments(compiler::PandaGen *pg) const
55 {
56 compiler::VReg argsObj = pg->AllocReg();
57 pg->CreateArray(this, arguments_, argsObj);
58
59 return argsObj;
60 }
61
CompileSuperCallWithSpreadArgs(compiler::PandaGen * pg) const62 void CallExpression::CompileSuperCallWithSpreadArgs(compiler::PandaGen *pg) const
63 {
64 compiler::RegScope paramScope(pg);
65 const ir::ScriptFunction *constructorFunc = util::Helpers::GetContainingConstructor(this);
66 CHECK_NOT_NULL(constructorFunc);
67 // For super call in default constructor.
68 if (constructorFunc->HasFlag(ir::ScriptFunctionFlags::GENERATED_CONSTRUCTOR)) {
69 // Use callruntime.supercallforwardallargs to optimize super call in default constructor since api13.
70 if (pg->Binder()->Program()->TargetApiVersion() >= util::Helpers::SUPER_CALL_OPT_MIN_SUPPORTED_API_VERSION) {
71 compiler::VReg funcObj = pg->AllocReg();
72 pg->GetFunctionObject(this);
73 pg->StoreAccumulator(this, funcObj);
74 pg->SuperCallForwardAllArgs(this, funcObj);
75 } else {
76 compiler::VReg argsObj = pg->AllocReg();
77 arguments_[0]->AsSpreadElement()->Argument()->Compile(pg);
78 pg->StoreAccumulator(this, argsObj);
79 pg->GetFunctionObject(this);
80 pg->SuperCallSpread(this, argsObj);
81 }
82 } else {
83 compiler::VReg argsObj = CreateSpreadArguments(pg);
84 pg->GetFunctionObject(this);
85 pg->SuperCallSpread(this, argsObj);
86 }
87 }
88
CompileSuperCall(compiler::PandaGen * pg,bool containsSpread) const89 void CallExpression::CompileSuperCall(compiler::PandaGen *pg, bool containsSpread) const
90 {
91 if (containsSpread) {
92 CompileSuperCallWithSpreadArgs(pg);
93 } else {
94 compiler::RegScope paramScope(pg);
95 compiler::VReg argStart {};
96
97 if (arguments_.empty()) {
98 argStart = pg->AllocReg();
99 pg->LoadConst(this, compiler::Constant::JS_UNDEFINED);
100 pg->StoreAccumulator(this, argStart);
101 } else {
102 argStart = pg->NextReg();
103 }
104
105 for (const auto *it : arguments_) {
106 compiler::VReg arg = pg->AllocReg();
107 it->Compile(pg);
108 pg->StoreAccumulator(it, arg);
109 }
110
111 pg->SuperCall(this, argStart, arguments_.size());
112 }
113
114 compiler::VReg newThis = pg->AllocReg();
115 pg->StoreAccumulator(this, newThis);
116
117 pg->GetThis(this);
118 pg->ThrowIfSuperNotCorrectCall(this, 1);
119
120 pg->LoadAccumulator(this, newThis);
121 pg->SetThis(this);
122
123 const auto *classDef = util::Helpers::GetClassDefiniton(util::Helpers::GetContainingConstructor(this));
124 if (classDef->NeedInstanceInitializer()) {
125 auto thisReg = pg->AllocReg();
126 pg->MoveVreg(this, thisReg, newThis);
127
128 auto [level, slot] = pg->Scope()->Find(classDef->InstanceInitializer()->Key());
129 pg->LoadLexicalVar(this, level, slot);
130
131 pg->CallInit(this, thisReg);
132 }
133 }
134
Compile(compiler::PandaGen * pg) const135 void CallExpression::Compile(compiler::PandaGen *pg) const
136 {
137 const ir::Expression *realCallee = callee_;
138 while (realCallee->IsTSNonNullExpression() || realCallee->IsTSAsExpression() || realCallee->IsTSTypeAssertion()) {
139 if (realCallee->IsTSNonNullExpression()) {
140 realCallee = realCallee->AsTSNonNullExpression()->Expr();
141 } else if (realCallee->IsTSAsExpression()) {
142 realCallee = realCallee->AsTSAsExpression()->Expr();
143 } else if (realCallee->IsTSTypeAssertion()) {
144 realCallee = realCallee->AsTSTypeAssertion()->GetExpression();
145 }
146 }
147
148 if (realCallee->IsCallExpression() || realCallee->IsNewExpression()) {
149 if (pg->TryCompileFunctionCallOrNewExpression(realCallee)) {
150 return;
151 }
152 }
153
154 compiler::RegScope rs(pg);
155 bool containsSpread = util::Helpers::ContainSpreadElement(arguments_);
156
157 if (callee_->IsSuperExpression()) {
158 CompileSuperCall(pg, containsSpread);
159 return;
160 }
161
162 compiler::VReg callee = pg->AllocReg();
163 bool hasThis = false;
164 compiler::VReg thisReg {};
165
166 if (realCallee->IsMemberExpression()) {
167 hasThis = true;
168 thisReg = pg->AllocReg();
169
170 compiler::RegScope mrs(pg);
171 realCallee->AsMemberExpression()->Compile(pg, thisReg);
172 } else if (realCallee->IsChainExpression()) {
173 hasThis = realCallee->AsChainExpression()->GetExpression()->IsMemberExpression();
174 if (hasThis) {
175 // Guaranteed by implementation in callThis, thisVReg is always the next register of callee.
176 thisVReg_ = callee + 1;
177 }
178 realCallee->AsChainExpression()->Compile(pg);
179 } else {
180 realCallee->Compile(pg);
181 }
182
183 pg->StoreAccumulator(this, callee);
184 pg->GetOptionalChain()->CheckNullish(optional_, callee);
185
186 if (containsSpread) {
187 if (!hasThis) {
188 thisReg = pg->AllocReg();
189 pg->LoadConst(this, compiler::Constant::JS_UNDEFINED);
190 pg->StoreAccumulator(this, thisReg);
191 }
192
193 compiler::VReg argsObj = CreateSpreadArguments(pg);
194 pg->CallSpread(this, callee, thisReg, argsObj);
195 return;
196 }
197
198 for (const auto *it : arguments_) {
199 it->Compile(pg);
200 compiler::VReg arg = pg->AllocReg();
201 pg->StoreAccumulator(it, arg);
202 }
203
204 if (hasThis) {
205 pg->CallThis(this, callee, static_cast<int64_t>(arguments_.size() + 1));
206 return;
207 }
208
209 pg->Call(this, callee, arguments_.size());
210 }
211
Check(checker::Checker * checker) const212 checker::Type *CallExpression::Check(checker::Checker *checker) const
213 {
214 checker::Type *calleeType = callee_->Check(checker);
215
216 // TODO(aszilagyi): handle optional chain
217 if (calleeType->IsObjectType()) {
218 checker::ObjectType *calleeObj = calleeType->AsObjectType();
219 return checker->resolveCallOrNewExpression(calleeObj->CallSignatures(), arguments_, Start());
220 }
221
222 checker->ThrowTypeError("This expression is not callable.", Start());
223 return nullptr;
224 }
225
UpdateSelf(const NodeUpdater & cb,binder::Binder * binder)226 void CallExpression::UpdateSelf(const NodeUpdater &cb, [[maybe_unused]] binder::Binder *binder)
227 {
228 callee_ = std::get<ir::AstNode *>(cb(callee_))->AsExpression();
229
230 if (typeParams_) {
231 typeParams_ = std::get<ir::AstNode *>(cb(typeParams_))->AsTSTypeParameterInstantiation();
232 }
233
234 for (auto iter = arguments_.begin(); iter != arguments_.end(); iter++) {
235 *iter = std::get<ir::AstNode *>(cb(*iter))->AsExpression();
236 }
237 }
238
239 } // namespace panda::es2panda::ir
240