[crankshaft] Fragmentation-free allocation folding.

src/crankshaft/arm64/lithium-arm64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CRANKSHAFT_ARM64_LITHIUM_ARM64_H_
 #define V8_CRANKSHAFT_ARM64_LITHIUM_ARM64_H_
 
 #include "src/crankshaft/hydrogen.h"
 #include "src/crankshaft/lithium.h"
 #include "src/crankshaft/lithium-allocator.h"
@@ skipping 52 matching lines @@
   V(DeclareGlobals)                          \
   V(Deoptimize)                              \
   V(DivByConstI)                             \
   V(DivByPowerOf2I)                          \
   V(DivI)                                    \
   V(DoubleBits)                              \
   V(DoubleToIntOrSmi)                        \
   V(Drop)                                    \
   V(Dummy)                                   \
   V(DummyUse)                                \
+  V(FastAllocate)                            \
   V(FlooringDivByConstI)                     \
   V(FlooringDivByPowerOf2I)                  \
   V(FlooringDivI)                            \
   V(ForInCacheArray)                         \
   V(ForInPrepareMap)                         \
   V(GetCachedArrayIndex)                     \
   V(Goto)                                    \
   V(HasCachedArrayIndexAndBranch)            \
   V(HasInPrototypeChainAndBranch)            \
   V(HasInstanceTypeAndBranch)                \
@@ skipping 73 matching lines @@
   V(ThisFunction)                            \
   V(TransitionElementsKind)                  \
   V(TrapAllocationMemento)                   \
   V(TruncateDoubleToIntOrSmi)                \
   V(Typeof)                                  \
   V(TypeofIsAndBranch)                       \
   V(Uint32ToDouble)                          \
   V(UnknownOSRValue)                         \
   V(WrapReceiver)
 
-
 #define DECLARE_CONCRETE_INSTRUCTION(type, mnemonic)            \
   Opcode opcode() const final { return LInstruction::k##type; } \
   void CompileToNative(LCodeGen* generator) final;              \
   const char* Mnemonic() const final { return mnemonic; }       \
   static L##type* cast(LInstruction* instr) {                   \
     DCHECK(instr->Is##type());                                  \
     return reinterpret_cast<L##type*>(instr);                   \
   }
 
 
@@ skipping 442 matching lines @@
   LOperand* context() { return inputs_[0]; }
   LOperand* size() { return inputs_[1]; }
   LOperand* temp1() { return temps_[0]; }
   LOperand* temp2() { return temps_[1]; }
   LOperand* temp3() { return temps_[2]; }
 
   DECLARE_CONCRETE_INSTRUCTION(Allocate, "allocate")
   DECLARE_HYDROGEN_ACCESSOR(Allocate)
 };
 
+class LFastAllocate final : public LTemplateInstruction<1, 1, 2> {
+ public:
+  LFastAllocate(LOperand* size, LOperand* temp1, LOperand* temp2) {
+    inputs_[0] = size;
+    temps_[0] = temp1;
+    temps_[1] = temp2;
+  }
+
+  LOperand* size() { return inputs_[0]; }
+  LOperand* temp1() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(FastAllocate, "fast-allocate")
+  DECLARE_HYDROGEN_ACCESSOR(Allocate)
+};
 
 class LApplyArguments final : public LTemplateInstruction<1, 4, 0> {
  public:
   LApplyArguments(LOperand* function,
                   LOperand* receiver,
                   LOperand* length,
                   LOperand* elements) {
     inputs_[0] = function;
     inputs_[1] = receiver;
     inputs_[2] = length;
@@ skipping 2387 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_ARM64_LITHIUM_ARM64_H_