Reviewers: Lasse Reichstein,
Description:
Add EmitGoto in x64 lithium codegen
Please review this at http://codereview.chromium.org/6299005/
SVN Base: http://v8.googlecode.com/svn/branches/bleeding_edge/
Affected files:
M src/x64/lithium-codegen-x64.cc
Index: src/x64/lithium-codegen-x64.cc
===================================================================
--- src/x64/lithium-codegen-x64.cc (revision 6315)
+++ src/x64/lithium-codegen-x64.cc (working copy)
@@ -565,7 +565,19 @@
void LCodeGen::EmitGoto(int block, LDeferredCode* deferred_stack_check) {
- Abort("Unimplemented: %s", "EmitGoto");
+ block = chunk_->LookupDestination(block);
+ int next_block = GetNextEmittedBlock(current_block_);
+ if (block != next_block) {
+ // Perform stack overflow check if this goto needs it before jumping.
+ if (deferred_stack_check != NULL) {
+ __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
+ __ j(above_equal, chunk_->GetAssemblyLabel(block));
+ __ jmp(deferred_stack_check->entry());
+ deferred_stack_check->SetExit(chunk_->GetAssemblyLabel(block));
+ } else {
+ __ jmp(chunk_->GetAssemblyLabel(block));
+ }
+ }
}
@@ -1155,7 +1167,6 @@
void LCodeGen::DoStackCheck(LStackCheck* instr) {
// Perform stack overflow check.
NearLabel done;
- ExternalReference stack_limit =
ExternalReference::address_of_stack_limit();
__ CompareRoot(rsp, Heap::kStackLimitRootIndex);
__ j(above_equal, &done);
--
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