Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(1262)

Unified Diff: src/x64/lithium-codegen-x64.cc

Issue 8775002: Simplify stack check instruction in Crankshaft. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 9 years, 1 month ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « src/ia32/lithium-ia32.cc ('k') | src/x64/lithium-x64.cc » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: src/x64/lithium-codegen-x64.cc
===================================================================
--- src/x64/lithium-codegen-x64.cc (revision 10109)
+++ src/x64/lithium-codegen-x64.cc (working copy)
@@ -4261,36 +4261,21 @@
LStackCheck* instr_;
};
- ASSERT(instr->HasEnvironment());
- LEnvironment* env = instr->environment();
+ DeferredStackCheck* deferred_stack_check =
+ new DeferredStackCheck(this, instr);
+ __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
+ __ j(below, deferred_stack_check->entry());
+ EnsureSpaceForLazyDeopt();
+ __ bind(instr->done_label());
+ deferred_stack_check->SetExit(instr->done_label());
// There is no LLazyBailout instruction for stack-checks. We have to
// prepare for lazy deoptimization explicitly here.
- if (instr->hydrogen()->is_function_entry()) {
- // Perform stack overflow check.
- Label done;
- __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
- __ j(above_equal, &done, Label::kNear);
- 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);
- __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
- __ 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.
- }
+ 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.
}
« no previous file with comments | « src/ia32/lithium-ia32.cc ('k') | src/x64/lithium-x64.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698