Compile FastCloneShallowObjectStub using Crankshaft.

src/arm/lithium-codegen-arm.cc

 // Copyright 2012 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 2804 matching lines @@
                   instr,
                   RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS);
   LEnvironment* env = instr->GetDeferredLazyDeoptimizationEnvironment();
   safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index());
   // Put the result value into the result register slot and
   // restore all registers.
   __ StoreToSafepointRegisterSlot(result, result);
 }
 
 
+void LCodeGen::DoInstanceSize(LInstanceSize* instr) {
+  Register object = ToRegister(instr->object());
+  Register result = ToRegister(instr->result());
+  __ ldr(result, FieldMemOperand(object, HeapObject::kMapOffset));
+  __ ldrb(result, FieldMemOperand(result, Map::kInstanceSizeOffset));
+}
+
+
 void LCodeGen::DoCmpT(LCmpT* instr) {
   Token::Value op = instr->op();
 
   Handle<Code> ic = CompareIC::GetUninitialized(op);
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
   // This instruction also signals no smi code inlined.
   __ cmp(r0, Operand::Zero());
 
   Condition condition = ComputeCompareCondition(op);
   __ LoadRoot(ToRegister(instr->result()),
@@ skipping 2747 matching lines @@
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() { codegen()->DoDeferredAllocate(instr_); }
     virtual LInstruction* instr() { return instr_; }
    private:
     LAllocate* instr_;
   };
 
   DeferredAllocate* deferred =
       new(zone()) DeferredAllocate(this, instr);
 
-  Register size = ToRegister(instr->size());
   Register result = ToRegister(instr->result());
   Register scratch = ToRegister(instr->temp1());
   Register scratch2 = ToRegister(instr->temp2());
 
-  HAllocate* original_instr = instr->hydrogen();
-  if (original_instr->size()->IsConstant()) {
-    UNREACHABLE();
-  } else {
-    // Allocate memory for the object.
-    AllocationFlags flags = TAG_OBJECT;
-    if (original_instr->MustAllocateDoubleAligned()) {
-      flags = static_cast<AllocationFlags>(flags | DOUBLE_ALIGNMENT);
-    }
+  // Allocate memory for the object.
+  AllocationFlags flags = TAG_OBJECT;
+  if (instr->hydrogen()->MustAllocateDoubleAligned()) {
+    flags = static_cast<AllocationFlags>(flags | DOUBLE_ALIGNMENT);
+  }
+  if (instr->size()->IsConstantOperand()) {
+    int32_t size = ToInteger32(LConstantOperand::cast(instr->size()));
     __ AllocateInNewSpace(size,
                           result,
                           scratch,
                           scratch2,
                           deferred->entry(),
-                          TAG_OBJECT);
+                          flags);
+  } else {
+    Register size = ToRegister(instr->size());
+    __ AllocateInNewSpace(size,
+                          result,
+                          scratch,
+                          scratch2,
+                          deferred->entry(),
+                          flags);
   }
 
   __ bind(deferred->exit());
 }
 
 
 void LCodeGen::DoDeferredAllocate(LAllocate* instr) {
   Register size = ToRegister(instr->size());
   Register result = ToRegister(instr->result());
 
@@ skipping 226 matching lines @@
   ASSERT_EQ(size, offset);
 }
 
 
 void LCodeGen::DoObjectLiteral(LObjectLiteral* instr) {
   Handle<FixedArray> literals(instr->environment()->closure()->literals());
   Handle<FixedArray> constant_properties =
       instr->hydrogen()->constant_properties();
 
   // Set up the parameters to the stub/runtime call.
-  __ LoadHeapObject(r4, literals);
-  __ mov(r3, Operand(Smi::FromInt(instr->hydrogen()->literal_index())));
-  __ mov(r2, Operand(constant_properties));
+  __ LoadHeapObject(r3, literals);
+  __ mov(r2, Operand(Smi::FromInt(instr->hydrogen()->literal_index())));
+  __ mov(r1, Operand(constant_properties));
   int flags = instr->hydrogen()->fast_elements()
       ? ObjectLiteral::kFastElements
       : ObjectLiteral::kNoFlags;
-  __ mov(r1, Operand(Smi::FromInt(flags)));
-  __ Push(r4, r3, r2, r1);
+  __ mov(r0, Operand(Smi::FromInt(flags)));
 
   // Pick the right runtime function or stub to call.
   int properties_count = constant_properties->length() / 2;
   if (instr->hydrogen()->depth() > 1) {
+    __ Push(r3, r2, r1, r0);
     CallRuntime(Runtime::kCreateObjectLiteral, 4, instr);
   } else if (flags != ObjectLiteral::kFastElements ||
       properties_count > FastCloneShallowObjectStub::kMaximumClonedProperties) {
+    __ Push(r3, r2, r1, r0);
     CallRuntime(Runtime::kCreateObjectLiteralShallow, 4, instr);
   } else {
     FastCloneShallowObjectStub stub(properties_count);
     CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
   }
 }
 
 
 void LCodeGen::DoToFastProperties(LToFastProperties* instr) {
   ASSERT(ToRegister(instr->value()).is(r0));
@@ skipping 433 matching lines @@
   __ sub(scratch, result, Operand(index, LSL, kPointerSizeLog2 - kSmiTagSize));
   __ ldr(result, FieldMemOperand(scratch,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal