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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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3407 | 3407 |
3408 case Token::VOID: { | 3408 case Token::VOID: { |
3409 Comment cmnt(masm_, "[ UnaryOperation (VOID)"); | 3409 Comment cmnt(masm_, "[ UnaryOperation (VOID)"); |
3410 VisitForEffect(expr->expression()); | 3410 VisitForEffect(expr->expression()); |
3411 context()->Plug(Heap::kUndefinedValueRootIndex); | 3411 context()->Plug(Heap::kUndefinedValueRootIndex); |
3412 break; | 3412 break; |
3413 } | 3413 } |
3414 | 3414 |
3415 case Token::NOT: { | 3415 case Token::NOT: { |
3416 Comment cmnt(masm_, "[ UnaryOperation (NOT)"); | 3416 Comment cmnt(masm_, "[ UnaryOperation (NOT)"); |
3417 Label materialize_true, materialize_false; | 3417 if (context()->IsEffect()) { |
3418 Label* if_true = NULL; | 3418 // Unary NOT has no side effects so it's only necessary to visit the |
3419 Label* if_false = NULL; | 3419 // subexpression. Match the optimizing compiler by not branching. |
3420 Label* fall_through = NULL; | 3420 VisitForEffect(expr->expression()); |
| 3421 } else { |
| 3422 Label materialize_true, materialize_false; |
| 3423 Label* if_true = NULL; |
| 3424 Label* if_false = NULL; |
| 3425 Label* fall_through = NULL; |
3421 | 3426 |
3422 // Notice that the labels are swapped. | 3427 // Notice that the labels are swapped. |
3423 context()->PrepareTest(&materialize_true, &materialize_false, | 3428 context()->PrepareTest(&materialize_true, &materialize_false, |
3424 &if_false, &if_true, &fall_through); | 3429 &if_false, &if_true, &fall_through); |
3425 if (context()->IsTest()) ForwardBailoutToChild(expr); | 3430 if (context()->IsTest()) ForwardBailoutToChild(expr); |
3426 VisitForControl(expr->expression(), if_true, if_false, fall_through); | 3431 VisitForControl(expr->expression(), if_true, if_false, fall_through); |
3427 context()->Plug(if_false, if_true); // Labels swapped. | 3432 context()->Plug(if_false, if_true); // Labels swapped. |
| 3433 } |
3428 break; | 3434 break; |
3429 } | 3435 } |
3430 | 3436 |
3431 case Token::TYPEOF: { | 3437 case Token::TYPEOF: { |
3432 Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)"); | 3438 Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)"); |
3433 { StackValueContext context(this); | 3439 { StackValueContext context(this); |
3434 VisitForTypeofValue(expr->expression()); | 3440 VisitForTypeofValue(expr->expression()); |
3435 } | 3441 } |
3436 __ CallRuntime(Runtime::kTypeof, 1); | 3442 __ CallRuntime(Runtime::kTypeof, 1); |
3437 context()->Plug(r0); | 3443 context()->Plug(r0); |
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4019 __ mov(r1, Operand(r1, ASR, 1)); // Un-smi-tag value. | 4025 __ mov(r1, Operand(r1, ASR, 1)); // Un-smi-tag value. |
4020 __ add(pc, r1, Operand(masm_->CodeObject())); | 4026 __ add(pc, r1, Operand(masm_->CodeObject())); |
4021 } | 4027 } |
4022 | 4028 |
4023 | 4029 |
4024 #undef __ | 4030 #undef __ |
4025 | 4031 |
4026 } } // namespace v8::internal | 4032 } } // namespace v8::internal |
4027 | 4033 |
4028 #endif // V8_TARGET_ARCH_ARM | 4034 #endif // V8_TARGET_ARCH_ARM |
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