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Unified Diff: src/mips64/code-stubs-mips64.cc

Issue 2412613004: [stubs] Remove unused StoreGlobalViaContextStub. (Closed)
Patch Set: Created 4 years, 2 months ago
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Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index b095efa44b9a09f2169e34003fbef78d3ea2fcad..7da216af18adebc76a7b4635b10300a9fad9e413 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -4600,119 +4600,6 @@ void FastNewStrictArgumentsStub::Generate(MacroAssembler* masm) {
}
-void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) {
- Register context_reg = cp;
- Register slot_reg = a2;
- Register value_reg = a0;
- Register cell_reg = a4;
- Register cell_value_reg = a5;
- Register cell_details_reg = a6;
- Label fast_heapobject_case, fast_smi_case, slow_case;
-
- if (FLAG_debug_code) {
- __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
- __ Check(ne, kUnexpectedValue, value_reg, Operand(at));
- }
-
- // Go up context chain to the script context.
- for (int i = 0; i < depth(); ++i) {
- __ ld(cell_reg, ContextMemOperand(context_reg, Context::PREVIOUS_INDEX));
- context_reg = cell_reg;
- }
-
- // Load the PropertyCell at the specified slot.
- __ Dlsa(at, context_reg, slot_reg, kPointerSizeLog2);
- __ ld(cell_reg, ContextMemOperand(at, 0));
-
- // Load PropertyDetails for the cell (actually only the cell_type and kind).
- __ ld(cell_details_reg,
- FieldMemOperand(cell_reg, PropertyCell::kDetailsOffset));
- __ SmiUntag(cell_details_reg);
- __ And(cell_details_reg, cell_details_reg,
- PropertyDetails::PropertyCellTypeField::kMask |
- PropertyDetails::KindField::kMask |
- PropertyDetails::kAttributesReadOnlyMask);
-
- // Check if PropertyCell holds mutable data.
- Label not_mutable_data;
- __ Branch(&not_mutable_data, ne, cell_details_reg,
- Operand(PropertyDetails::PropertyCellTypeField::encode(
- PropertyCellType::kMutable) |
- PropertyDetails::KindField::encode(kData)));
- __ JumpIfSmi(value_reg, &fast_smi_case);
- __ bind(&fast_heapobject_case);
- __ sd(value_reg, FieldMemOperand(cell_reg, PropertyCell::kValueOffset));
- __ RecordWriteField(cell_reg, PropertyCell::kValueOffset, value_reg,
- cell_details_reg, kRAHasNotBeenSaved, kDontSaveFPRegs,
- EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
- // RecordWriteField clobbers the value register, so we need to reload.
- __ Ret(USE_DELAY_SLOT);
- __ ld(value_reg, FieldMemOperand(cell_reg, PropertyCell::kValueOffset));
- __ bind(&not_mutable_data);
-
- // Check if PropertyCell value matches the new value (relevant for Constant,
- // ConstantType and Undefined cells).
- Label not_same_value;
- __ ld(cell_value_reg, FieldMemOperand(cell_reg, PropertyCell::kValueOffset));
- __ Branch(&not_same_value, ne, value_reg, Operand(cell_value_reg));
- // Make sure the PropertyCell is not marked READ_ONLY.
- __ And(at, cell_details_reg, PropertyDetails::kAttributesReadOnlyMask);
- __ Branch(&slow_case, ne, at, Operand(zero_reg));
- if (FLAG_debug_code) {
- Label done;
- // This can only be true for Constant, ConstantType and Undefined cells,
- // because we never store the_hole via this stub.
- __ Branch(&done, eq, cell_details_reg,
- Operand(PropertyDetails::PropertyCellTypeField::encode(
- PropertyCellType::kConstant) |
- PropertyDetails::KindField::encode(kData)));
- __ Branch(&done, eq, cell_details_reg,
- Operand(PropertyDetails::PropertyCellTypeField::encode(
- PropertyCellType::kConstantType) |
- PropertyDetails::KindField::encode(kData)));
- __ Check(eq, kUnexpectedValue, cell_details_reg,
- Operand(PropertyDetails::PropertyCellTypeField::encode(
- PropertyCellType::kUndefined) |
- PropertyDetails::KindField::encode(kData)));
- __ bind(&done);
- }
- __ Ret();
- __ bind(&not_same_value);
-
- // Check if PropertyCell contains data with constant type (and is not
- // READ_ONLY).
- __ Branch(&slow_case, ne, cell_details_reg,
- Operand(PropertyDetails::PropertyCellTypeField::encode(
- PropertyCellType::kConstantType) |
- PropertyDetails::KindField::encode(kData)));
-
- // Now either both old and new values must be SMIs or both must be heap
- // objects with same map.
- Label value_is_heap_object;
- __ JumpIfNotSmi(value_reg, &value_is_heap_object);
- __ JumpIfNotSmi(cell_value_reg, &slow_case);
- // Old and new values are SMIs, no need for a write barrier here.
- __ bind(&fast_smi_case);
- __ Ret(USE_DELAY_SLOT);
- __ sd(value_reg, FieldMemOperand(cell_reg, PropertyCell::kValueOffset));
- __ bind(&value_is_heap_object);
- __ JumpIfSmi(cell_value_reg, &slow_case);
- Register cell_value_map_reg = cell_value_reg;
- __ ld(cell_value_map_reg,
- FieldMemOperand(cell_value_reg, HeapObject::kMapOffset));
- __ Branch(&fast_heapobject_case, eq, cell_value_map_reg,
- FieldMemOperand(value_reg, HeapObject::kMapOffset));
-
- // Fallback to the runtime.
- __ bind(&slow_case);
- __ SmiTag(slot_reg);
- __ Push(slot_reg, value_reg);
- __ TailCallRuntime(is_strict(language_mode())
- ? Runtime::kStoreGlobalViaContext_Strict
- : Runtime::kStoreGlobalViaContext_Sloppy);
-}
-
-
static int AddressOffset(ExternalReference ref0, ExternalReference ref1) {
int64_t offset = (ref0.address() - ref1.address());
DCHECK(static_cast<int>(offset) == offset);
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