Merged: [crankshaft] Disable further folding already folded allocations.

src/crankshaft/hydrogen-instructions.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_HYDROGEN_INSTRUCTIONS_H_
 #define V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_
 
 #include <cstring>
 #include <iosfwd>
 
@@ skipping 4917 matching lines @@
 
   void MakeDoubleAligned() {
     flags_ = static_cast<HAllocate::Flags>(flags_ | ALLOCATE_DOUBLE_ALIGNED);
   }
 
   void MakeAllocationFoldingDominator() {
     flags_ =
         static_cast<HAllocate::Flags>(flags_ | ALLOCATION_FOLDING_DOMINATOR);
   }
 
-  bool IsAllocationFoldingDominator() {
+  bool IsAllocationFoldingDominator() const {
     return (flags_ & ALLOCATION_FOLDING_DOMINATOR) != 0;
   }
 
   void MakeFoldedAllocation(HAllocate* dominator) {
     flags_ = static_cast<HAllocate::Flags>(flags_ | ALLOCATION_FOLDED);
     ClearFlag(kTrackSideEffectDominators);
     ClearChangesFlag(kNewSpacePromotion);
     SetOperandAt(2, dominator);
   }
 
-  bool IsAllocationFolded() { return (flags_ & ALLOCATION_FOLDED) != 0; }
+  bool IsAllocationFolded() const { return (flags_ & ALLOCATION_FOLDED) != 0; }
 
   bool HandleSideEffectDominator(GVNFlag side_effect,
                                  HValue* dominator) override;
 
   std::ostream& PrintDataTo(std::ostream& os) const override;  // NOLINT
 
   DECLARE_CONCRETE_INSTRUCTION(Allocate)
 
  private:
   enum Flags {
@@ skipping 2166 matching lines @@
   bool IsDeletable() const override { return true; }
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_