Version 3.17.1
Performance and stability improvements on all platforms.
git-svn-id: http://v8.googlecode.com/svn/trunk@13671 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index a1b467d..27e460c 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -96,6 +96,9 @@
ASSERT(is_done());
code->set_stack_slots(GetStackSlotCount());
code->set_safepoint_table_offset(safepoints_.GetCodeOffset());
+ if (FLAG_weak_embedded_maps_in_optimized_code) {
+ RegisterDependentCodeForEmbeddedMaps(code);
+ }
PopulateDeoptimizationData(code);
if (!info()->IsStub()) {
Deoptimizer::EnsureRelocSpaceForLazyDeoptimization(code);
@@ -896,6 +899,31 @@
}
+void LCodeGen::RegisterDependentCodeForEmbeddedMaps(Handle<Code> code) {
+ ZoneList<Handle<Map> > maps(1, zone());
+ int mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
+ for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
+ RelocInfo::Mode mode = it.rinfo()->rmode();
+ if (mode == RelocInfo::EMBEDDED_OBJECT &&
+ it.rinfo()->target_object()->IsMap()) {
+ Handle<Map> map(Map::cast(it.rinfo()->target_object()));
+ if (map->CanTransition()) {
+ maps.Add(map, zone());
+ }
+ }
+ }
+#ifdef VERIFY_HEAP
+ // This disables verification of weak embedded maps after full GC.
+ // AddDependentCode can cause a GC, which would observe the state where
+ // this code is not yet in the depended code lists of the embedded maps.
+ NoWeakEmbeddedMapsVerificationScope disable_verification_of_embedded_maps;
+#endif
+ for (int i = 0; i < maps.length(); i++) {
+ maps.at(i)->AddDependentCode(code);
+ }
+}
+
+
void LCodeGen::PopulateDeoptimizationData(Handle<Code> code) {
int length = deoptimizations_.length();
if (length == 0) return;