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Unified Diff: src/ia32/lithium-codegen-ia32.cc

Issue 8769008: Revert r10118 from bleeding edge. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 9 years, 1 month ago
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Index: src/ia32/lithium-codegen-ia32.cc
===================================================================
--- src/ia32/lithium-codegen-ia32.cc (revision 10131)
+++ src/ia32/lithium-codegen-ia32.cc (working copy)
@@ -4554,23 +4554,43 @@
LStackCheck* instr_;
};
- DeferredStackCheck* deferred_stack_check =
- new DeferredStackCheck(this, instr);
- ExternalReference stack_limit =
- ExternalReference::address_of_stack_limit(isolate());
- __ cmp(esp, Operand::StaticVariable(stack_limit));
- __ j(below, deferred_stack_check->entry());
- EnsureSpaceForLazyDeopt();
- __ bind(instr->done_label());
- deferred_stack_check->SetExit(instr->done_label());
+ ASSERT(instr->HasEnvironment());
+ LEnvironment* env = instr->environment();
// There is no LLazyBailout instruction for stack-checks. We have to
// prepare for lazy deoptimization explicitly here.
- ASSERT(instr->HasEnvironment());
- LEnvironment* env = instr->environment();
- RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt);
- // Don't record a deoptimization index for the safepoint here.
- // This will be done explicitly when emitting call and the safepoint in
- // the deferred code.
+ if (instr->hydrogen()->is_function_entry()) {
+ // Perform stack overflow check.
+ Label done;
+ ExternalReference stack_limit =
+ ExternalReference::address_of_stack_limit(isolate());
+ __ cmp(esp, Operand::StaticVariable(stack_limit));
+ __ j(above_equal, &done, Label::kNear);
+
+ ASSERT(instr->context()->IsRegister());
+ ASSERT(ToRegister(instr->context()).is(esi));
+ StackCheckStub stub;
+ CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+ EnsureSpaceForLazyDeopt();
+ __ bind(&done);
+ RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt);
+ safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index());
+ } else {
+ ASSERT(instr->hydrogen()->is_backwards_branch());
+ // Perform stack overflow check if this goto needs it before jumping.
+ DeferredStackCheck* deferred_stack_check =
+ new DeferredStackCheck(this, instr);
+ ExternalReference stack_limit =
+ ExternalReference::address_of_stack_limit(isolate());
+ __ cmp(esp, Operand::StaticVariable(stack_limit));
+ __ j(below, deferred_stack_check->entry());
+ EnsureSpaceForLazyDeopt();
+ __ bind(instr->done_label());
+ deferred_stack_check->SetExit(instr->done_label());
+ RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt);
+ // Don't record a deoptimization index for the safepoint here.
+ // This will be done explicitly when emitting call and the safepoint in
+ // the deferred code.
+ }
}
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