[crankshaft] Fragmentation-free allocation folding.

src/crankshaft/x87/lithium-x87.h

 // Copyright 2012 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_X87_LITHIUM_X87_H_
 #define V8_CRANKSHAFT_X87_LITHIUM_X87_H_
 
 #include "src/crankshaft/hydrogen.h"
 #include "src/crankshaft/lithium.h"
 #include "src/crankshaft/lithium-allocator.h"
@@ skipping 54 matching lines @@
   V(Deoptimize)                              \
   V(DivByConstI)                             \
   V(DivByPowerOf2I)                          \
   V(DivI)                                    \
   V(DoubleBits)                              \
   V(DoubleToI)                               \
   V(DoubleToSmi)                             \
   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 61 matching lines @@
   V(TaggedToI)                               \
   V(ThisFunction)                            \
   V(TransitionElementsKind)                  \
   V(TrapAllocationMemento)                   \
   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 2224 matching lines @@
   }
 
   LOperand* context() { return inputs_[0]; }
   LOperand* size() { return inputs_[1]; }
   LOperand* temp() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(Allocate, "allocate")
   DECLARE_HYDROGEN_ACCESSOR(Allocate)
 };
 
+class LFastAllocate final : public LTemplateInstruction<1, 1, 1> {
+ public:
+  LFastAllocate(LOperand* size, LOperand* temp) {
+    inputs_[0] = size;
+    temps_[0] = temp;
+  }
+
+  LOperand* size() const { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(FastAllocate, "fast-allocate")
+  DECLARE_HYDROGEN_ACCESSOR(Allocate)
+};
 
 class LTypeof final : public LTemplateInstruction<1, 2, 0> {
  public:
   LTypeof(LOperand* context, LOperand* value) {
     inputs_[0] = context;
     inputs_[1] = value;
   }
 
   LOperand* context() { return inputs_[0]; }
   LOperand* value() { return inputs_[1]; }
@@ skipping 257 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_X87_LITHIUM_X87_H_