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Issue 23496046: Remove indirection when calling Runtime_StackGuard. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 3 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 // 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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5651 5651
5652 ASSERT(instr->HasEnvironment()); 5652 ASSERT(instr->HasEnvironment());
5653 LEnvironment* env = instr->environment(); 5653 LEnvironment* env = instr->environment();
5654 // There is no LLazyBailout instruction for stack-checks. We have to 5654 // There is no LLazyBailout instruction for stack-checks. We have to
5655 // prepare for lazy deoptimization explicitly here. 5655 // prepare for lazy deoptimization explicitly here.
5656 if (instr->hydrogen()->is_function_entry()) { 5656 if (instr->hydrogen()->is_function_entry()) {
5657 // Perform stack overflow check. 5657 // Perform stack overflow check.
5658 Label done; 5658 Label done;
5659 __ LoadRoot(at, Heap::kStackLimitRootIndex); 5659 __ LoadRoot(at, Heap::kStackLimitRootIndex);
5660 __ Branch(&done, hs, sp, Operand(at)); 5660 __ Branch(&done, hs, sp, Operand(at));
5661 CallCode(isolate()->builtins()->StackCheck(), 5661 CallRuntime(Runtime::kStackGuard, 0, instr);
5662 RelocInfo::CODE_TARGET,
5663 instr);
5664 EnsureSpaceForLazyDeopt(); 5662 EnsureSpaceForLazyDeopt();
5665 last_lazy_deopt_pc_ = masm()->pc_offset(); 5663 last_lazy_deopt_pc_ = masm()->pc_offset();
5666 __ bind(&done); 5664 __ bind(&done);
5667 RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt); 5665 RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt);
5668 safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); 5666 safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index());
5669 } else { 5667 } else {
5670 ASSERT(instr->hydrogen()->is_backwards_branch()); 5668 ASSERT(instr->hydrogen()->is_backwards_branch());
5671 // Perform stack overflow check if this goto needs it before jumping. 5669 // Perform stack overflow check if this goto needs it before jumping.
5672 DeferredStackCheck* deferred_stack_check = 5670 DeferredStackCheck* deferred_stack_check =
5673 new(zone()) DeferredStackCheck(this, instr); 5671 new(zone()) DeferredStackCheck(this, instr);
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5788 __ Subu(scratch, result, scratch); 5786 __ Subu(scratch, result, scratch);
5789 __ lw(result, FieldMemOperand(scratch, 5787 __ lw(result, FieldMemOperand(scratch,
5790 FixedArray::kHeaderSize - kPointerSize)); 5788 FixedArray::kHeaderSize - kPointerSize));
5791 __ bind(&done); 5789 __ bind(&done);
5792 } 5790 }
5793 5791
5794 5792
5795 #undef __ 5793 #undef __
5796 5794
5797 } } // namespace v8::internal 5795 } } // namespace v8::internal
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