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| 1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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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| 5383 | 5383 |
| 5384 ASSERT(instr->HasEnvironment()); | 5384 ASSERT(instr->HasEnvironment()); |
| 5385 LEnvironment* env = instr->environment(); | 5385 LEnvironment* env = instr->environment(); |
| 5386 // There is no LLazyBailout instruction for stack-checks. We have to | 5386 // There is no LLazyBailout instruction for stack-checks. We have to |
| 5387 // prepare for lazy deoptimization explicitly here. | 5387 // prepare for lazy deoptimization explicitly here. |
| 5388 if (instr->hydrogen()->is_function_entry()) { | 5388 if (instr->hydrogen()->is_function_entry()) { |
| 5389 // Perform stack overflow check. | 5389 // Perform stack overflow check. |
| 5390 Label done; | 5390 Label done; |
| 5391 __ CompareRoot(rsp, Heap::kStackLimitRootIndex); | 5391 __ CompareRoot(rsp, Heap::kStackLimitRootIndex); |
| 5392 __ j(above_equal, &done, Label::kNear); | 5392 __ j(above_equal, &done, Label::kNear); |
| 5393 CallCode(isolate()->builtins()->StackCheck(), | 5393 CallRuntime(Runtime::kStackGuard, 0, instr); |
| 5394 RelocInfo::CODE_TARGET, | |
| 5395 instr); | |
| 5396 EnsureSpaceForLazyDeopt(Deoptimizer::patch_size()); | 5394 EnsureSpaceForLazyDeopt(Deoptimizer::patch_size()); |
| 5397 last_lazy_deopt_pc_ = masm()->pc_offset(); | 5395 last_lazy_deopt_pc_ = masm()->pc_offset(); |
| 5398 __ bind(&done); | 5396 __ bind(&done); |
| 5399 RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt); | 5397 RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt); |
| 5400 safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); | 5398 safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); |
| 5401 } else { | 5399 } else { |
| 5402 ASSERT(instr->hydrogen()->is_backwards_branch()); | 5400 ASSERT(instr->hydrogen()->is_backwards_branch()); |
| 5403 // Perform stack overflow check if this goto needs it before jumping. | 5401 // Perform stack overflow check if this goto needs it before jumping. |
| 5404 DeferredStackCheck* deferred_stack_check = | 5402 DeferredStackCheck* deferred_stack_check = |
| 5405 new(zone()) DeferredStackCheck(this, instr); | 5403 new(zone()) DeferredStackCheck(this, instr); |
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| 5519 FixedArray::kHeaderSize - kPointerSize)); | 5517 FixedArray::kHeaderSize - kPointerSize)); |
| 5520 __ bind(&done); | 5518 __ bind(&done); |
| 5521 } | 5519 } |
| 5522 | 5520 |
| 5523 | 5521 |
| 5524 #undef __ | 5522 #undef __ |
| 5525 | 5523 |
| 5526 } } // namespace v8::internal | 5524 } } // namespace v8::internal |
| 5527 | 5525 |
| 5528 #endif // V8_TARGET_ARCH_X64 | 5526 #endif // V8_TARGET_ARCH_X64 |
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