Fix Frame::AlignSavedCalleeRegisterSlots

src/compiler/frame.h

 // Copyright 2014 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_COMPILER_FRAME_H_
 #define V8_COMPILER_FRAME_H_
 
 #include "src/bit-vector.h"
 #include "src/frames.h"
 
@@ skipping 92 matching lines @@
     DCHECK(allocated_double_registers_ == NULL);
     allocated_double_registers_ = regs;
   }
 
   bool DidAllocateDoubleRegisters() {
     return !allocated_double_registers_->IsEmpty();
   }
 
   int AlignSavedCalleeRegisterSlots() {
     DCHECK_EQ(0, spilled_callee_register_slot_count_);
-    int frame_slot_count_before = frame_slot_count_;
-    frame_slot_count_ = RoundUp(frame_slot_count_, 2);
-    return frame_slot_count_before - frame_slot_count_;
+    int delta = frame_slot_count_ & 1;
+    frame_slot_count_ += delta;
+    return delta;
   }
 
   void AllocateSavedCalleeRegisterSlots(int count) {
     frame_slot_count_ += count;
     spilled_callee_register_slot_count_ += count;
   }
 
   int AllocateSpillSlot(int width) {
     DCHECK_EQ(0, spilled_callee_register_slot_count_);
     int frame_slot_count_before = frame_slot_count_;
@@ skipping 56 matching lines @@
   int offset_;  // Encodes SP or FP in the low order bit.
 
   static const int kFromSp = 1;
   static const int kFromFp = 0;
 };
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_FRAME_H_