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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 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_X64 | 7 #if V8_TARGET_ARCH_X64 |
8 | 8 |
9 #include "src/code-factory.h" | 9 #include "src/code-factory.h" |
10 #include "src/codegen.h" | 10 #include "src/codegen.h" |
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92 __ j(above_equal, &ok); | 92 __ j(above_equal, &ok); |
93 | 93 |
94 CallRuntimePassFunction(masm, Runtime::kTryInstallOptimizedCode); | 94 CallRuntimePassFunction(masm, Runtime::kTryInstallOptimizedCode); |
95 GenerateTailCallToReturnedCode(masm); | 95 GenerateTailCallToReturnedCode(masm); |
96 | 96 |
97 __ bind(&ok); | 97 __ bind(&ok); |
98 GenerateTailCallToSharedCode(masm); | 98 GenerateTailCallToSharedCode(masm); |
99 } | 99 } |
100 | 100 |
101 | 101 |
| 102 static void Generate_Runtime_NewObject(MacroAssembler* masm, |
| 103 bool create_memento, |
| 104 Register original_constructor, |
| 105 Label* count_incremented, |
| 106 Label* allocated) { |
| 107 int offset = 0; |
| 108 if (create_memento) { |
| 109 // Get the cell or allocation site. |
| 110 __ movp(rdi, Operand(rsp, kPointerSize * 2)); |
| 111 __ Push(rdi); |
| 112 offset = kPointerSize; |
| 113 } |
| 114 |
| 115 // Must restore rsi (context) and rdi (constructor) before calling runtime. |
| 116 __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 117 __ movp(rdi, Operand(rsp, offset)); |
| 118 __ Push(rdi); |
| 119 __ Push(original_constructor); |
| 120 if (create_memento) { |
| 121 __ CallRuntime(Runtime::kNewObjectWithAllocationSite, 3); |
| 122 } else { |
| 123 __ CallRuntime(Runtime::kNewObject, 2); |
| 124 } |
| 125 __ movp(rbx, rax); // store result in rbx |
| 126 |
| 127 // Runtime_NewObjectWithAllocationSite increments allocation count. |
| 128 // Skip the increment. |
| 129 if (create_memento) { |
| 130 __ jmp(count_incremented); |
| 131 } else { |
| 132 __ jmp(allocated); |
| 133 } |
| 134 } |
| 135 |
| 136 |
102 static void Generate_JSConstructStubHelper(MacroAssembler* masm, | 137 static void Generate_JSConstructStubHelper(MacroAssembler* masm, |
103 bool is_api_function, | 138 bool is_api_function, |
104 bool create_memento) { | 139 bool create_memento) { |
105 // ----------- S t a t e ------------- | 140 // ----------- S t a t e ------------- |
106 // -- rax: number of arguments | 141 // -- rax: number of arguments |
107 // -- rdi: constructor function | 142 // -- rdi: constructor function |
108 // -- rbx: allocation site or undefined | 143 // -- rbx: allocation site or undefined |
| 144 // -- rdx: original constructor |
109 // ----------------------------------- | 145 // ----------------------------------- |
110 | 146 |
111 // Should never create mementos for api functions. | 147 // Should never create mementos for api functions. |
112 DCHECK(!is_api_function || !create_memento); | 148 DCHECK(!is_api_function || !create_memento); |
113 | 149 |
114 // Enter a construct frame. | 150 // Enter a construct frame. |
115 { | 151 { |
116 FrameScope scope(masm, StackFrame::CONSTRUCT); | 152 FrameScope scope(masm, StackFrame::CONSTRUCT); |
117 | 153 |
118 if (create_memento) { | 154 if (create_memento) { |
119 __ AssertUndefinedOrAllocationSite(rbx); | 155 __ AssertUndefinedOrAllocationSite(rbx); |
120 __ Push(rbx); | 156 __ Push(rbx); |
121 } | 157 } |
122 | 158 |
123 // Store a smi-tagged arguments count on the stack. | 159 // Store a smi-tagged arguments count on the stack. |
124 __ Integer32ToSmi(rax, rax); | 160 __ Integer32ToSmi(rax, rax); |
125 __ Push(rax); | 161 __ Push(rax); |
126 | 162 |
127 // Push the function to invoke on the stack. | 163 // Push the function to invoke on the stack. |
128 __ Push(rdi); | 164 __ Push(rdi); |
129 | 165 |
| 166 Label rt_call, normal_new, allocated, count_incremented; |
| 167 __ cmpp(rdx, rdi); |
| 168 __ j(equal, &normal_new); |
| 169 |
| 170 Generate_Runtime_NewObject(masm, create_memento, rdx, &count_incremented, |
| 171 &allocated); |
| 172 |
| 173 __ bind(&normal_new); |
130 // Try to allocate the object without transitioning into C code. If any of | 174 // Try to allocate the object without transitioning into C code. If any of |
131 // the preconditions is not met, the code bails out to the runtime call. | 175 // the preconditions is not met, the code bails out to the runtime call. |
132 Label rt_call, allocated; | |
133 if (FLAG_inline_new) { | 176 if (FLAG_inline_new) { |
134 Label undo_allocation; | 177 Label undo_allocation; |
135 | 178 |
136 ExternalReference debug_step_in_fp = | 179 ExternalReference debug_step_in_fp = |
137 ExternalReference::debug_step_in_fp_address(masm->isolate()); | 180 ExternalReference::debug_step_in_fp_address(masm->isolate()); |
138 __ Move(kScratchRegister, debug_step_in_fp); | 181 __ Move(kScratchRegister, debug_step_in_fp); |
139 __ cmpp(Operand(kScratchRegister, 0), Immediate(0)); | 182 __ cmpp(Operand(kScratchRegister, 0), Immediate(0)); |
140 __ j(not_equal, &rt_call); | 183 __ j(not_equal, &rt_call); |
141 | 184 |
142 // Verified that the constructor is a JSFunction. | 185 // Verified that the constructor is a JSFunction. |
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338 // example, the map's unused properties potentially do not match the | 381 // example, the map's unused properties potentially do not match the |
339 // allocated objects unused properties. | 382 // allocated objects unused properties. |
340 // rbx: JSObject (previous new top) | 383 // rbx: JSObject (previous new top) |
341 __ bind(&undo_allocation); | 384 __ bind(&undo_allocation); |
342 __ UndoAllocationInNewSpace(rbx); | 385 __ UndoAllocationInNewSpace(rbx); |
343 } | 386 } |
344 | 387 |
345 // Allocate the new receiver object using the runtime call. | 388 // Allocate the new receiver object using the runtime call. |
346 // rdi: function (constructor) | 389 // rdi: function (constructor) |
347 __ bind(&rt_call); | 390 __ bind(&rt_call); |
348 int offset = 0; | 391 Generate_Runtime_NewObject(masm, create_memento, rdi, &count_incremented, |
349 if (create_memento) { | 392 &allocated); |
350 // Get the cell or allocation site. | |
351 __ movp(rdi, Operand(rsp, kPointerSize*2)); | |
352 __ Push(rdi); | |
353 offset = kPointerSize; | |
354 } | |
355 | |
356 // Must restore rsi (context) and rdi (constructor) before calling runtime. | |
357 __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset)); | |
358 __ movp(rdi, Operand(rsp, offset)); | |
359 __ Push(rdi); | |
360 if (create_memento) { | |
361 __ CallRuntime(Runtime::kNewObjectWithAllocationSite, 2); | |
362 } else { | |
363 __ CallRuntime(Runtime::kNewObject, 1); | |
364 } | |
365 __ movp(rbx, rax); // store result in rbx | |
366 | |
367 // If we ended up using the runtime, and we want a memento, then the | |
368 // runtime call made it for us, and we shouldn't do create count | |
369 // increment. | |
370 Label count_incremented; | |
371 if (create_memento) { | |
372 __ jmp(&count_incremented); | |
373 } | |
374 | 393 |
375 // New object allocated. | 394 // New object allocated. |
376 // rbx: newly allocated object | 395 // rbx: newly allocated object |
377 __ bind(&allocated); | 396 __ bind(&allocated); |
378 | 397 |
379 if (create_memento) { | 398 if (create_memento) { |
380 __ movp(rcx, Operand(rsp, kPointerSize*2)); | 399 __ movp(rcx, Operand(rsp, kPointerSize*2)); |
381 __ Cmp(rcx, masm->isolate()->factory()->undefined_value()); | 400 __ Cmp(rcx, masm->isolate()->factory()->undefined_value()); |
382 __ j(equal, &count_incremented); | 401 __ j(equal, &count_incremented); |
383 // rcx is an AllocationSite. We are creating a memento from it, so we | 402 // rcx is an AllocationSite. We are creating a memento from it, so we |
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1520 __ bind(&ok); | 1539 __ bind(&ok); |
1521 __ ret(0); | 1540 __ ret(0); |
1522 } | 1541 } |
1523 | 1542 |
1524 | 1543 |
1525 #undef __ | 1544 #undef __ |
1526 | 1545 |
1527 } } // namespace v8::internal | 1546 } } // namespace v8::internal |
1528 | 1547 |
1529 #endif // V8_TARGET_ARCH_X64 | 1548 #endif // V8_TARGET_ARCH_X64 |
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