Make the detailed reason for deopts mandatory on all platforms.

src/arm64/lithium-codegen-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_ARM64_LITHIUM_CODEGEN_ARM64_H_
 #define V8_ARM64_LITHIUM_CODEGEN_ARM64_H_
 
 #include "src/arm64/lithium-arm64.h"
 
 #include "src/arm64/lithium-gap-resolver-arm64.h"
@@ skipping 199 matching lines @@
   void PopulateDeoptimizationLiteralsWithInlinedFunctions();
 
   MemOperand BuildSeqStringOperand(Register string,
                                    Register temp,
                                    LOperand* index,
                                    String::Encoding encoding);
   void DeoptimizeBranch(LInstruction* instr, const char* detail,
                         BranchType branch_type, Register reg = NoReg,
                         int bit = -1,
                         Deoptimizer::BailoutType* override_bailout_type = NULL);
-  void Deoptimize(LInstruction* instr,
-                  Deoptimizer::BailoutType* override_bailout_type = NULL,
-                  const char* detail = NULL);
-  void DeoptimizeIf(Condition cond, LInstruction* instr,
-                    const char* detail = NULL);
-  void DeoptimizeIfZero(Register rt, LInstruction* instr,
-                        const char* detail = NULL);
+  void Deoptimize(LInstruction* instr, const char* detail,
+                  Deoptimizer::BailoutType* override_bailout_type = NULL);
+  void DeoptimizeIf(Condition cond, LInstruction* instr, const char* detail);
+  void DeoptimizeIfZero(Register rt, LInstruction* instr, const char* detail);
   void DeoptimizeIfNotZero(Register rt, LInstruction* instr,
-                           const char* detail = NULL);
+                           const char* detail);
   void DeoptimizeIfNegative(Register rt, LInstruction* instr,
-                            const char* detail = NULL);
-  void DeoptimizeIfSmi(Register rt, LInstruction* instr,
-                       const char* detail = NULL);
-  void DeoptimizeIfNotSmi(Register rt, LInstruction* instr,
-                          const char* detail = NULL);
+                            const char* detail);
+  void DeoptimizeIfSmi(Register rt, LInstruction* instr, const char* detail);
+  void DeoptimizeIfNotSmi(Register rt, LInstruction* instr, const char* detail);
   void DeoptimizeIfRoot(Register rt, Heap::RootListIndex index,
-                        LInstruction* instr, const char* detail = NULL);
+                        LInstruction* instr, const char* detail);
   void DeoptimizeIfNotRoot(Register rt, Heap::RootListIndex index,
-                           LInstruction* instr, const char* detail = NULL);
+                           LInstruction* instr, const char* detail);
   void DeoptimizeIfNotHeapNumber(Register object, LInstruction* instr);
   void DeoptimizeIfMinusZero(DoubleRegister input, LInstruction* instr,
-                             const char* detail = NULL);
+                             const char* detail);
   void DeoptimizeIfBitSet(Register rt, int bit, LInstruction* instr,
-                          const char* detail = NULL);
+                          const char* detail);
   void DeoptimizeIfBitClear(Register rt, int bit, LInstruction* instr,
-                            const char* detail = NULL);
+                            const char* detail);
 
   MemOperand PrepareKeyedExternalArrayOperand(Register key,
                                               Register base,
                                               Register scratch,
                                               bool key_is_smi,
                                               bool key_is_constant,
                                               int constant_key,
                                               ElementsKind elements_kind,
                                               int base_offset);
   MemOperand PrepareKeyedArrayOperand(Register base,
@@ skipping 208 matching lines @@
 
  protected:
   MacroAssembler* masm() const { return codegen_->masm(); }
 
   LCodeGen* codegen_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM64_LITHIUM_CODEGEN_ARM64_H_