MIPS: port Merge experimental/gc branch to the bleeding_edge.

src/mips/ic-mips.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 192 matching lines @@
   __ And(at, scratch1, Operand(kTypeAndReadOnlyMask));
   __ Branch(miss, ne, at, Operand(zero_reg));
 
   // Store the value at the masked, scaled index and return.
   const int kValueOffset = kElementsStartOffset + kPointerSize;
   __ Addu(scratch2, scratch2, Operand(kValueOffset - kHeapObjectTag));
   __ sw(value, MemOperand(scratch2));
 
   // Update the write barrier. Make sure not to clobber the value.
   __ mov(scratch1, value);
-  __ RecordWrite(elements, scratch2, scratch1);
+  __ RecordWrite(
+      elements, scratch2, scratch1, kRAHasNotBeenSaved, kDontSaveFPRegs);
 }
 
 
 void LoadIC::GenerateArrayLength(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- a2    : name
   //  -- ra    : return address
   //  -- a0    : receiver
   //  -- sp[0] : receiver
   // -----------------------------------
@@ skipping 673 matching lines @@
   // ---------- S t a t e --------------
   //  -- a0     : value
   //  -- a1     : key
   //  -- a2     : receiver
   //  -- lr     : return address
   // -----------------------------------
   Label slow, notin;
   MemOperand mapped_location =
       GenerateMappedArgumentsLookup(masm, a2, a1, a3, t0, t1, &notin, &slow);
   __ sw(a0, mapped_location);
-  // Verify mapped_location MemOperand is register, with no offset.
-  ASSERT_EQ(mapped_location.offset(), 0);
-  __ RecordWrite(a3, mapped_location.rm(), t5);
+  __ Addu(t2, a3, t1);
+  __ mov(t5, a0);
+  __ RecordWrite(a3, t2, t5, kRAHasNotBeenSaved, kDontSaveFPRegs);
   __ Ret(USE_DELAY_SLOT);
   __ mov(v0, a0);  // (In delay slot) return the value stored in v0.
   __ bind(&notin);
   // The unmapped lookup expects that the parameter map is in a3.
   MemOperand unmapped_location =
       GenerateUnmappedArgumentsLookup(masm, a1, a3, t0, &slow);
   __ sw(a0, unmapped_location);
-  ASSERT_EQ(unmapped_location.offset(), 0);
-  __ RecordWrite(a3, unmapped_location.rm(), t5);
+  __ Addu(t2, a3, t0);
+  __ mov(t5, a0);
+  __ RecordWrite(a3, t2, t5, kRAHasNotBeenSaved, kDontSaveFPRegs);
   __ Ret(USE_DELAY_SLOT);
   __ mov(v0, a0);  // (In delay slot) return the value stored in v0.
   __ bind(&slow);
   GenerateMiss(masm, false);
 }
 
 
 void KeyedCallIC::GenerateNonStrictArguments(MacroAssembler* masm,
                                              int argc) {
   // ----------- S t a t e -------------
@@ skipping 354 matching lines @@
   __ lw(t3, FieldMemOperand(elements, HeapObject::kMapOffset));
   __ LoadRoot(t0, Heap::kFixedArrayMapRootIndex);
   __ Branch(&slow, ne, t3, Operand(t0));
 
   // Check the key against the length in the array.
   __ lw(t0, FieldMemOperand(receiver, JSArray::kLengthOffset));
   __ Branch(&extra, hs, key, Operand(t0));
   // Fall through to fast case.
 
   __ bind(&fast);
+  Register scratch_value = t0;
+  Register address = t1;
   // Fast case, store the value to the elements backing store.
-  __ Addu(t4, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ sll(t1, key, kPointerSizeLog2 - kSmiTagSize);
-  __ Addu(t4, t4, Operand(t1));
-  __ sw(value, MemOperand(t4));
+  __ Addu(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
+  __ sll(scratch_value, key, kPointerSizeLog2 - kSmiTagSize);
+  __ Addu(address, address, scratch_value);
+  __ sw(value, MemOperand(address));
   // Skip write barrier if the written value is a smi.
   __ JumpIfSmi(value, &exit);
 
   // Update write barrier for the elements array address.
-  __ Subu(t3, t4, Operand(elements));
-
-  __ RecordWrite(elements, Operand(t3), t4, t5);
+  __ mov(scratch_value, value);  // Preserve the value which is returned.
+  __ RecordWrite(elements,
+                 address,
+                 scratch_value,
+                 kRAHasNotBeenSaved,
+                 kDontSaveFPRegs,
+                 EMIT_REMEMBERED_SET,
+                 OMIT_SMI_CHECK);
   __ bind(&exit);
 
   __ mov(v0, a0);  // Return the value written.
   __ Ret();
 }
 
 
 void KeyedLoadIC::GenerateIndexedInterceptor(MacroAssembler* masm) {
   // ---------- S t a t e --------------
   //  -- ra     : return address
@@ skipping 314 matching lines @@
     Register reg = Register::from_code(Assembler::GetRs(instr_at_patch));
     patcher.masm()->andi(at, reg, kSmiTagMask);
     patcher.ChangeBranchCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS