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Issue 1376333003: Eliminate no_frame_range data (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 2 months ago
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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_MIPS 5 #if V8_TARGET_ARCH_MIPS
6 6
7 // Note on Mips implementation: 7 // Note on Mips implementation:
8 // 8 //
9 // The result_register() for mips is the 'v0' register, which is defined 9 // The result_register() for mips is the 'v0' register, which is defined
10 // by the ABI to contain function return values. However, the first 10 // by the ABI to contain function return values. However, the first
11 // parameter to a function is defined to be 'a0'. So there are many 11 // parameter to a function is defined to be 'a0'. So there are many
12 // places where we have to move a previous result in v0 to a0 for the 12 // places where we have to move a previous result in v0 to a0 for the
13 // next call: mov(a0, v0). This is not needed on the other architectures. 13 // next call: mov(a0, v0). This is not needed on the other architectures.
14 14
15 #include "src/code-factory.h" 15 #include "src/code-factory.h"
16 #include "src/code-stubs.h" 16 #include "src/code-stubs.h"
17 #include "src/codegen.h" 17 #include "src/codegen.h"
18 #include "src/compiler.h"
19 #include "src/debug/debug.h" 18 #include "src/debug/debug.h"
20 #include "src/full-codegen/full-codegen.h" 19 #include "src/full-codegen/full-codegen.h"
21 #include "src/ic/ic.h" 20 #include "src/ic/ic.h"
22 #include "src/parser.h" 21 #include "src/parser.h"
23 #include "src/scopes.h" 22 #include "src/scopes.h"
24 23
25 #include "src/mips/code-stubs-mips.h" 24 #include "src/mips/code-stubs-mips.h"
26 #include "src/mips/macro-assembler-mips.h" 25 #include "src/mips/macro-assembler-mips.h"
27 26
28 namespace v8 { 27 namespace v8 {
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143 __ bind(&ok); 142 __ bind(&ok);
144 } 143 }
145 144
146 // Open a frame scope to indicate that there is a frame on the stack. The 145 // Open a frame scope to indicate that there is a frame on the stack. The
147 // MANUAL indicates that the scope shouldn't actually generate code to set up 146 // MANUAL indicates that the scope shouldn't actually generate code to set up
148 // the frame (that is done below). 147 // the frame (that is done below).
149 FrameScope frame_scope(masm_, StackFrame::MANUAL); 148 FrameScope frame_scope(masm_, StackFrame::MANUAL);
150 149
151 info->set_prologue_offset(masm_->pc_offset()); 150 info->set_prologue_offset(masm_->pc_offset());
152 __ Prologue(info->IsCodePreAgingActive()); 151 __ Prologue(info->IsCodePreAgingActive());
153 info->AddNoFrameRange(0, masm_->pc_offset());
154 152
155 { Comment cmnt(masm_, "[ Allocate locals"); 153 { Comment cmnt(masm_, "[ Allocate locals");
156 int locals_count = info->scope()->num_stack_slots(); 154 int locals_count = info->scope()->num_stack_slots();
157 // Generators allocate locals, if any, in context slots. 155 // Generators allocate locals, if any, in context slots.
158 DCHECK(!IsGeneratorFunction(info->literal()->kind()) || locals_count == 0); 156 DCHECK(!IsGeneratorFunction(info->literal()->kind()) || locals_count == 0);
159 if (locals_count > 0) { 157 if (locals_count > 0) {
160 if (locals_count >= 128) { 158 if (locals_count >= 128) {
161 Label ok; 159 Label ok;
162 __ Subu(t5, sp, Operand(locals_count * kPointerSize)); 160 __ Subu(t5, sp, Operand(locals_count * kPointerSize));
163 __ LoadRoot(a2, Heap::kRealStackLimitRootIndex); 161 __ LoadRoot(a2, Heap::kRealStackLimitRootIndex);
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467 465
468 // Make sure that the constant pool is not emitted inside of the return 466 // Make sure that the constant pool is not emitted inside of the return
469 // sequence. 467 // sequence.
470 { Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_); 468 { Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_);
471 // Here we use masm_-> instead of the __ macro to avoid the code coverage 469 // Here we use masm_-> instead of the __ macro to avoid the code coverage
472 // tool from instrumenting as we rely on the code size here. 470 // tool from instrumenting as we rely on the code size here.
473 int32_t arg_count = info_->scope()->num_parameters() + 1; 471 int32_t arg_count = info_->scope()->num_parameters() + 1;
474 int32_t sp_delta = arg_count * kPointerSize; 472 int32_t sp_delta = arg_count * kPointerSize;
475 SetReturnPosition(literal()); 473 SetReturnPosition(literal());
476 masm_->mov(sp, fp); 474 masm_->mov(sp, fp);
477 int no_frame_start = masm_->pc_offset();
478 masm_->MultiPop(static_cast<RegList>(fp.bit() | ra.bit())); 475 masm_->MultiPop(static_cast<RegList>(fp.bit() | ra.bit()));
479 masm_->Addu(sp, sp, Operand(sp_delta)); 476 masm_->Addu(sp, sp, Operand(sp_delta));
480 masm_->Jump(ra); 477 masm_->Jump(ra);
481 info_->AddNoFrameRange(no_frame_start, masm_->pc_offset());
482 } 478 }
483 } 479 }
484 } 480 }
485 481
486 482
487 void FullCodeGenerator::StackValueContext::Plug(Variable* var) const { 483 void FullCodeGenerator::StackValueContext::Plug(Variable* var) const {
488 DCHECK(var->IsStackAllocated() || var->IsContextSlot()); 484 DCHECK(var->IsStackAllocated() || var->IsContextSlot());
489 codegen()->GetVar(result_register(), var); 485 codegen()->GetVar(result_register(), var);
490 __ push(result_register()); 486 __ push(result_register());
491 } 487 }
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5239 reinterpret_cast<uint32_t>( 5235 reinterpret_cast<uint32_t>(
5240 isolate->builtins()->OsrAfterStackCheck()->entry())); 5236 isolate->builtins()->OsrAfterStackCheck()->entry()));
5241 return OSR_AFTER_STACK_CHECK; 5237 return OSR_AFTER_STACK_CHECK;
5242 } 5238 }
5243 5239
5244 5240
5245 } // namespace internal 5241 } // namespace internal
5246 } // namespace v8 5242 } // namespace v8
5247 5243
5248 #endif // V8_TARGET_ARCH_MIPS 5244 #endif // V8_TARGET_ARCH_MIPS
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