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Unified Diff: src/arm/lithium-arm.cc

Issue 256303007: Don't add code dependencies on transitioning stores eagerly. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 6 years, 8 months ago
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Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 5b2a5f5ec1048b662522ba584aa637f3f969162a..0ed3ddb8a414f8332dd13400a42810f8a882c4b4 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -429,6 +429,12 @@ void LChunkBuilder::Abort(BailoutReason reason) {
}
+void LChunkBuilder::AddDeprecationDependency(Handle<Map> map) {
+ if (map->is_deprecated()) return Abort(kMapBecameDeprecated);
+ chunk_->AddDeprecationDependency(map);
+}
+
+
LUnallocated* LChunkBuilder::ToUnallocated(Register reg) {
return new(zone()) LUnallocated(LUnallocated::FIXED_REGISTER,
Register::ToAllocationIndex(reg));
@@ -2300,6 +2306,11 @@ LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
// We need a temporary register for write barrier of the map field.
LOperand* temp = needs_write_barrier_for_map ? TempRegister() : NULL;
+ // Add a deprecation dependency on the transition target map.
+ if (instr->has_transition()) {
+ AddDeprecationDependency(instr->transition_map());
+ }
+
LInstruction* result = new(zone()) LStoreNamedField(obj, val, temp);
if (!instr->access().IsExternalMemory() &&
instr->field_representation().IsHeapObject() &&
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