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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 |
| 5 part of ssa; | 5 part of ssa; |
| 6 | 6 |
| 7 class SsaCodeGeneratorTask extends CompilerTask { | 7 class SsaCodeGeneratorTask extends CompilerTask { |
| 8 | 8 |
| 9 final JavaScriptBackend backend; | 9 final JavaScriptBackend backend; |
| 10 | 10 |
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| 227 */ | 227 */ |
| 228 void pushStatement(js.Statement statement, [HInstruction instruction]) { | 228 void pushStatement(js.Statement statement, [HInstruction instruction]) { |
| 229 assert(expressionStack.isEmpty); | 229 assert(expressionStack.isEmpty); |
| 230 if (instruction != null) { | 230 if (instruction != null) { |
| 231 attachLocation(statement, instruction); | 231 attachLocation(statement, instruction); |
| 232 } | 232 } |
| 233 currentContainer.statements.add(statement); | 233 currentContainer.statements.add(statement); |
| 234 } | 234 } |
| 235 | 235 |
| 236 void insertStatementAtStart(js.Statement statement) { | 236 void insertStatementAtStart(js.Statement statement) { |
| 237 currentContainer.statements.insertRange(0, 1, statement); | 237 currentContainer.statements.insert(0, statement); |
| 238 } | 238 } |
| 239 | 239 |
| 240 /** | 240 /** |
| 241 * If the [instruction] is not `null` it will be used to attach the position | 241 * If the [instruction] is not `null` it will be used to attach the position |
| 242 * to the [expression]. | 242 * to the [expression]. |
| 243 */ | 243 */ |
| 244 pushExpressionAsStatement(js.Expression expression, | 244 pushExpressionAsStatement(js.Expression expression, |
| 245 [HInstruction instruction]) { | 245 [HInstruction instruction]) { |
| 246 pushStatement(new js.ExpressionStatement(expression), instruction); | 246 pushStatement(new js.ExpressionStatement(expression), instruction); |
| 247 } | 247 } |
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| 2960 if (leftType.canBeNull() && rightType.canBeNull()) { | 2960 if (leftType.canBeNull() && rightType.canBeNull()) { |
| 2961 if (left.isConstantNull() || right.isConstantNull() || | 2961 if (left.isConstantNull() || right.isConstantNull() || |
| 2962 (leftType.isPrimitive() && leftType == rightType)) { | 2962 (leftType.isPrimitive() && leftType == rightType)) { |
| 2963 return '=='; | 2963 return '=='; |
| 2964 } | 2964 } |
| 2965 return null; | 2965 return null; |
| 2966 } else { | 2966 } else { |
| 2967 return '==='; | 2967 return '==='; |
| 2968 } | 2968 } |
| 2969 } | 2969 } |
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