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1 // Copyright 2012 the V8 project authors. All rights reserved.7 | 1 // Copyright 2012 the V8 project authors. All rights reserved.7 |
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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158 } | 158 } |
159 | 159 |
160 info()->set_prologue_offset(masm_->pc_offset()); | 160 info()->set_prologue_offset(masm_->pc_offset()); |
161 if (NeedsEagerFrame()) { | 161 if (NeedsEagerFrame()) { |
162 if (info()->IsStub()) { | 162 if (info()->IsStub()) { |
163 __ StubPrologue(); | 163 __ StubPrologue(); |
164 } else { | 164 } else { |
165 __ Prologue(info()->IsCodePreAgingActive()); | 165 __ Prologue(info()->IsCodePreAgingActive()); |
166 } | 166 } |
167 frame_is_built_ = true; | 167 frame_is_built_ = true; |
168 info_->AddNoFrameRange(0, masm_->pc_offset()); | |
169 } | 168 } |
170 | 169 |
171 // Reserve space for the stack slots needed by the code. | 170 // Reserve space for the stack slots needed by the code. |
172 int slots = GetStackSlotCount(); | 171 int slots = GetStackSlotCount(); |
173 if (slots > 0) { | 172 if (slots > 0) { |
174 if (FLAG_debug_code) { | 173 if (FLAG_debug_code) { |
175 __ Subu(sp, sp, Operand(slots * kPointerSize)); | 174 __ Subu(sp, sp, Operand(slots * kPointerSize)); |
176 __ Push(a0, a1); | 175 __ Push(a0, a1); |
177 __ Addu(a0, sp, Operand(slots * kPointerSize)); | 176 __ Addu(a0, sp, Operand(slots * kPointerSize)); |
178 __ li(a1, Operand(kSlotsZapValue)); | 177 __ li(a1, Operand(kSlotsZapValue)); |
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2679 // Runtime::TraceExit returns its parameter in v0. We're leaving the code | 2678 // Runtime::TraceExit returns its parameter in v0. We're leaving the code |
2680 // managed by the register allocator and tearing down the frame, it's | 2679 // managed by the register allocator and tearing down the frame, it's |
2681 // safe to write to the context register. | 2680 // safe to write to the context register. |
2682 __ push(v0); | 2681 __ push(v0); |
2683 __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); | 2682 __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
2684 __ CallRuntime(Runtime::kTraceExit, 1); | 2683 __ CallRuntime(Runtime::kTraceExit, 1); |
2685 } | 2684 } |
2686 if (info()->saves_caller_doubles()) { | 2685 if (info()->saves_caller_doubles()) { |
2687 RestoreCallerDoubles(); | 2686 RestoreCallerDoubles(); |
2688 } | 2687 } |
2689 int no_frame_start = -1; | |
2690 if (NeedsEagerFrame()) { | 2688 if (NeedsEagerFrame()) { |
2691 __ mov(sp, fp); | 2689 __ mov(sp, fp); |
2692 no_frame_start = masm_->pc_offset(); | |
2693 __ Pop(ra, fp); | 2690 __ Pop(ra, fp); |
2694 } | 2691 } |
2695 if (instr->has_constant_parameter_count()) { | 2692 if (instr->has_constant_parameter_count()) { |
2696 int parameter_count = ToInteger32(instr->constant_parameter_count()); | 2693 int parameter_count = ToInteger32(instr->constant_parameter_count()); |
2697 int32_t sp_delta = (parameter_count + 1) * kPointerSize; | 2694 int32_t sp_delta = (parameter_count + 1) * kPointerSize; |
2698 if (sp_delta != 0) { | 2695 if (sp_delta != 0) { |
2699 __ Addu(sp, sp, Operand(sp_delta)); | 2696 __ Addu(sp, sp, Operand(sp_delta)); |
2700 } | 2697 } |
2701 } else { | 2698 } else { |
2702 DCHECK(info()->IsStub()); // Functions would need to drop one more value. | 2699 DCHECK(info()->IsStub()); // Functions would need to drop one more value. |
2703 Register reg = ToRegister(instr->parameter_count()); | 2700 Register reg = ToRegister(instr->parameter_count()); |
2704 // The argument count parameter is a smi | 2701 // The argument count parameter is a smi |
2705 __ SmiUntag(reg); | 2702 __ SmiUntag(reg); |
2706 __ sll(at, reg, kPointerSizeLog2); | 2703 __ sll(at, reg, kPointerSizeLog2); |
2707 __ Addu(sp, sp, at); | 2704 __ Addu(sp, sp, at); |
2708 } | 2705 } |
2709 | 2706 |
2710 __ Jump(ra); | 2707 __ Jump(ra); |
2711 | |
2712 if (no_frame_start != -1) { | |
2713 info_->AddNoFrameRange(no_frame_start, masm_->pc_offset()); | |
2714 } | |
2715 } | 2708 } |
2716 | 2709 |
2717 | 2710 |
2718 template <class T> | 2711 template <class T> |
2719 void LCodeGen::EmitVectorLoadICRegisters(T* instr) { | 2712 void LCodeGen::EmitVectorLoadICRegisters(T* instr) { |
2720 Register vector_register = ToRegister(instr->temp_vector()); | 2713 Register vector_register = ToRegister(instr->temp_vector()); |
2721 Register slot_register = LoadWithVectorDescriptor::SlotRegister(); | 2714 Register slot_register = LoadWithVectorDescriptor::SlotRegister(); |
2722 DCHECK(vector_register.is(LoadWithVectorDescriptor::VectorRegister())); | 2715 DCHECK(vector_register.is(LoadWithVectorDescriptor::VectorRegister())); |
2723 DCHECK(slot_register.is(a0)); | 2716 DCHECK(slot_register.is(a0)); |
2724 | 2717 |
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5900 __ Push(at, ToRegister(instr->function())); | 5893 __ Push(at, ToRegister(instr->function())); |
5901 CallRuntime(Runtime::kPushBlockContext, 2, instr); | 5894 CallRuntime(Runtime::kPushBlockContext, 2, instr); |
5902 RecordSafepoint(Safepoint::kNoLazyDeopt); | 5895 RecordSafepoint(Safepoint::kNoLazyDeopt); |
5903 } | 5896 } |
5904 | 5897 |
5905 | 5898 |
5906 #undef __ | 5899 #undef __ |
5907 | 5900 |
5908 } // namespace internal | 5901 } // namespace internal |
5909 } // namespace v8 | 5902 } // namespace v8 |
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