Emit comment with instruction+reason before deopt calls.

src/mips64/lithium-codegen-mips64.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_MIPS_LITHIUM_CODEGEN_MIPS_H_
 #define V8_MIPS_LITHIUM_CODEGEN_MIPS_H_
 
 #include "src/deoptimizer.h"
 #include "src/lithium-codegen.h"
 #include "src/mips64/lithium-gap-resolver-mips64.h"
@@ skipping 214 matching lines @@
                          A1State a1_state);
 
   void RecordSafepointWithLazyDeopt(LInstruction* instr,
                                     SafepointMode safepoint_mode);
 
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment,
                                             Safepoint::DeoptMode mode);
   void DeoptimizeIf(Condition condition, LInstruction* instr,
                     Deoptimizer::BailoutType bailout_type,
                     Register src1 = zero_reg,
-                    const Operand& src2 = Operand(zero_reg));
+                    const Operand& src2 = Operand(zero_reg),
+                    const char* reason = NULL);
   void DeoptimizeIf(Condition condition, LInstruction* instr,
                     Register src1 = zero_reg,
-                    const Operand& src2 = Operand(zero_reg));
+                    const Operand& src2 = Operand(zero_reg),
+                    const char* reason = NULL);
 
   void AddToTranslation(LEnvironment* environment,
                         Translation* translation,
                         LOperand* op,
                         bool is_tagged,
                         bool is_uint32,
                         int* object_index_pointer,
                         int* dematerialized_index_pointer);
   void PopulateDeoptimizationData(Handle<Code> code);
   int DefineDeoptimizationLiteral(Handle<Object> literal);
@@ skipping 190 matching lines @@
   LCodeGen* codegen_;
   Label entry_;
   Label exit_;
   Label* external_exit_;
   int instruction_index_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_MIPS_LITHIUM_CODEGEN_MIPS_H_