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MIPS: Track up to 5 stable maps as field type.

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Port r20831 (f91f993)

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/240503008

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20847 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
plind44@gmail.com 2014-04-17 13:37:28 +00:00
parent 313844d842
commit fd0df23b10
1 changed files with 34 additions and 12 deletions
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46
src/mips/stub-cache-mips.cc
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@ -415,13 +415,24 @@ void StoreStubCompiler::GenerateStoreTransition(MacroAssembler* masm,
} else if (representation.IsSmi()) {
__ JumpIfNotSmi(value_reg, miss_label);
} else if (representation.IsHeapObject()) {
__ JumpIfSmi(value_reg, miss_label);
HeapType* field_type = descriptors->GetFieldType(descriptor);
if (field_type->IsClass()) {
__ CheckMap(value_reg, scratch1, field_type->AsClass()->Map(),
miss_label, DO_SMI_CHECK);
} else {
ASSERT(HeapType::Any()->Is(field_type));
__ JumpIfSmi(value_reg, miss_label);
HeapType::Iterator<Map> it = field_type->Classes();
Handle<Map> current;
if (!it.Done()) {
__ lw(scratch1, FieldMemOperand(value_reg, HeapObject::kMapOffset));
Label do_store;
while (true) {
// Do the CompareMap() directly within the Branch() functions.
current = it.Current();
it.Advance();
if (it.Done()) {
__ Branch(miss_label, ne, scratch1, Operand(current));
break;
}
__ Branch(&do_store, eq, scratch1, Operand(current));
}
__ bind(&do_store);
}
} else if (representation.IsDouble()) {
Label do_store, heap_number;
@ -585,13 +596,24 @@ void StoreStubCompiler::GenerateStoreField(MacroAssembler* masm,
if (representation.IsSmi()) {
__ JumpIfNotSmi(value_reg, miss_label);
} else if (representation.IsHeapObject()) {
__ JumpIfSmi(value_reg, miss_label);
HeapType* field_type = lookup->GetFieldType();
if (field_type->IsClass()) {
__ CheckMap(value_reg, scratch1, field_type->AsClass()->Map(),
miss_label, DO_SMI_CHECK);
} else {
ASSERT(HeapType::Any()->Is(field_type));
__ JumpIfSmi(value_reg, miss_label);
HeapType::Iterator<Map> it = field_type->Classes();
if (!it.Done()) {
__ lw(scratch1, FieldMemOperand(value_reg, HeapObject::kMapOffset));
Label do_store;
Handle<Map> current;
while (true) {
// Do the CompareMap() directly within the Branch() functions.
current = it.Current();
it.Advance();
if (it.Done()) {
__ Branch(miss_label, ne, scratch1, Operand(current));
break;
}
__ Branch(&do_store, eq, scratch1, Operand(current));
}
__ bind(&do_store);
}
} else if (representation.IsDouble()) {
// Load the double storage.