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

Issue 22255005: MIPS: Replace LoadNamedFieldPolymorphic with explicit branches. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 4 months ago
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Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index 758276b2bdd757a82f6c82c9a0c5c0124bdcc5ab..b1ca96503c7cae3370b6223f480df11aa8dabeda 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -2921,90 +2921,6 @@ void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
}
-void LCodeGen::EmitLoadFieldOrConstantFunction(Register result,
- Register object,
- Handle<Map> type,
- Handle<String> name,
- LEnvironment* env) {
- LookupResult lookup(isolate());
- type->LookupDescriptor(NULL, *name, &lookup);
- ASSERT(lookup.IsFound() || lookup.IsCacheable());
- if (lookup.IsField()) {
- int index = lookup.GetLocalFieldIndexFromMap(*type);
- int offset = index * kPointerSize;
- if (index < 0) {
- // Negative property indices are in-object properties, indexed
- // from the end of the fixed part of the object.
- __ lw(result, FieldMemOperand(object, offset + type->instance_size()));
- } else {
- // Non-negative property indices are in the properties array.
- __ lw(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
- __ lw(result, FieldMemOperand(result, offset + FixedArray::kHeaderSize));
- }
- } else if (lookup.IsConstant()) {
- Handle<Object> constant(lookup.GetConstantFromMap(*type), isolate());
- __ LoadObject(result, constant);
- } else {
- // Negative lookup.
- // Check prototypes.
- Handle<HeapObject> current(HeapObject::cast((*type)->prototype()));
- Heap* heap = type->GetHeap();
- while (*current != heap->null_value()) {
- __ LoadHeapObject(result, current);
- __ lw(result, FieldMemOperand(result, HeapObject::kMapOffset));
- DeoptimizeIf(ne, env, result, Operand(Handle<Map>(current->map())));
- current =
- Handle<HeapObject>(HeapObject::cast(current->map()->prototype()));
- }
- __ LoadRoot(result, Heap::kUndefinedValueRootIndex);
- }
-}
-
-
-void LCodeGen::DoLoadNamedFieldPolymorphic(LLoadNamedFieldPolymorphic* instr) {
- Register object = ToRegister(instr->object());
- Register result = ToRegister(instr->result());
- Register object_map = scratch0();
-
- int map_count = instr->hydrogen()->types()->length();
- bool need_generic = instr->hydrogen()->need_generic();
-
- if (map_count == 0 && !need_generic) {
- DeoptimizeIf(al, instr->environment());
- return;
- }
- Handle<String> name = instr->hydrogen()->name();
- Label done;
- __ lw(object_map, FieldMemOperand(object, HeapObject::kMapOffset));
- for (int i = 0; i < map_count; ++i) {
- bool last = (i == map_count - 1);
- Handle<Map> map = instr->hydrogen()->types()->at(i);
- Label check_passed;
- __ CompareMapAndBranch(object_map, map, &check_passed, eq, &check_passed);
- if (last && !need_generic) {
- DeoptimizeIf(al, instr->environment());
- __ bind(&check_passed);
- EmitLoadFieldOrConstantFunction(
- result, object, map, name, instr->environment());
- } else {
- Label next;
- __ Branch(&next);
- __ bind(&check_passed);
- EmitLoadFieldOrConstantFunction(
- result, object, map, name, instr->environment());
- __ Branch(&done);
- __ bind(&next);
- }
- }
- if (need_generic) {
- __ li(a2, Operand(name));
- Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
- CallCode(ic, RelocInfo::CODE_TARGET, instr);
- }
- __ bind(&done);
-}
-
-
void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) {
ASSERT(ToRegister(instr->object()).is(a0));
ASSERT(ToRegister(instr->result()).is(v0));
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