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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #if V8_TARGET_ARCH_IA32 | 5 #if V8_TARGET_ARCH_IA32 |
6 | 6 |
7 #include "src/code-factory.h" | 7 #include "src/code-factory.h" |
8 #include "src/codegen.h" | 8 #include "src/codegen.h" |
9 #include "src/deoptimizer.h" | 9 #include "src/deoptimizer.h" |
10 #include "src/full-codegen/full-codegen.h" | 10 #include "src/full-codegen/full-codegen.h" |
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889 SharedFunctionInfo::kOffsetToPreviousContext)); | 889 SharedFunctionInfo::kOffsetToPreviousContext)); |
890 __ mov(temp, FieldOperand(temp, WeakCell::kValueOffset)); | 890 __ mov(temp, FieldOperand(temp, WeakCell::kValueOffset)); |
891 __ cmp(temp, native_context); | 891 __ cmp(temp, native_context); |
892 __ j(not_equal, &loop_bottom); | 892 __ j(not_equal, &loop_bottom); |
893 // OSR id set to none? | 893 // OSR id set to none? |
894 __ mov(temp, FieldOperand(map, index, times_half_pointer_size, | 894 __ mov(temp, FieldOperand(map, index, times_half_pointer_size, |
895 SharedFunctionInfo::kOffsetToPreviousOsrAstId)); | 895 SharedFunctionInfo::kOffsetToPreviousOsrAstId)); |
896 const int bailout_id = BailoutId::None().ToInt(); | 896 const int bailout_id = BailoutId::None().ToInt(); |
897 __ cmp(temp, Immediate(Smi::FromInt(bailout_id))); | 897 __ cmp(temp, Immediate(Smi::FromInt(bailout_id))); |
898 __ j(not_equal, &loop_bottom); | 898 __ j(not_equal, &loop_bottom); |
| 899 |
899 // Literals available? | 900 // Literals available? |
| 901 Label got_literals, maybe_cleared_weakcell; |
900 __ mov(temp, FieldOperand(map, index, times_half_pointer_size, | 902 __ mov(temp, FieldOperand(map, index, times_half_pointer_size, |
901 SharedFunctionInfo::kOffsetToPreviousLiterals)); | 903 SharedFunctionInfo::kOffsetToPreviousLiterals)); |
| 904 |
| 905 // temp contains either a WeakCell pointing to the literals array or the |
| 906 // literals array directly. |
| 907 STATIC_ASSERT(WeakCell::kValueOffset == FixedArray::kLengthOffset); |
| 908 __ JumpIfSmi(FieldOperand(temp, WeakCell::kValueOffset), |
| 909 &maybe_cleared_weakcell); |
| 910 // The WeakCell value is a pointer, therefore it's a valid literals array. |
902 __ mov(temp, FieldOperand(temp, WeakCell::kValueOffset)); | 911 __ mov(temp, FieldOperand(temp, WeakCell::kValueOffset)); |
903 __ JumpIfSmi(temp, &gotta_call_runtime); | 912 __ jmp(&got_literals); |
| 913 |
| 914 // We have a smi. If it's 0, then we are looking at a cleared WeakCell |
| 915 // around the literals array, and we should visit the runtime. If it's > 0, |
| 916 // then temp already contains the literals array. |
| 917 __ bind(&maybe_cleared_weakcell); |
| 918 __ cmp(FieldOperand(temp, WeakCell::kValueOffset), Immediate(0)); |
| 919 __ j(equal, &gotta_call_runtime); |
904 | 920 |
905 // Save the literals in the closure. | 921 // Save the literals in the closure. |
| 922 __ bind(&got_literals); |
906 __ mov(ecx, Operand(esp, 0)); | 923 __ mov(ecx, Operand(esp, 0)); |
907 __ mov(FieldOperand(ecx, JSFunction::kLiteralsOffset), temp); | 924 __ mov(FieldOperand(ecx, JSFunction::kLiteralsOffset), temp); |
908 __ push(index); | 925 __ push(index); |
909 __ RecordWriteField(ecx, JSFunction::kLiteralsOffset, temp, index, | 926 __ RecordWriteField(ecx, JSFunction::kLiteralsOffset, temp, index, |
910 kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK); | 927 kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK); |
911 __ pop(index); | 928 __ pop(index); |
912 | 929 |
913 // Code available? | 930 // Code available? |
914 Register entry = ecx; | 931 Register entry = ecx; |
915 __ mov(entry, FieldOperand(map, index, times_half_pointer_size, | 932 __ mov(entry, FieldOperand(map, index, times_half_pointer_size, |
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2882 // And "return" to the OSR entry point of the function. | 2899 // And "return" to the OSR entry point of the function. |
2883 __ ret(0); | 2900 __ ret(0); |
2884 } | 2901 } |
2885 | 2902 |
2886 | 2903 |
2887 #undef __ | 2904 #undef __ |
2888 } // namespace internal | 2905 } // namespace internal |
2889 } // namespace v8 | 2906 } // namespace v8 |
2890 | 2907 |
2891 #endif // V8_TARGET_ARCH_IA32 | 2908 #endif // V8_TARGET_ARCH_IA32 |
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