[turbofan] smash GapInstruction into Instruction

src/compiler/graph-visualizer.cc

 // 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.
 
 #include "src/compiler/graph-visualizer.h"
 
 #include <sstream>
 #include <string>
 
 #include "src/code-stubs.h"
@@ skipping 575 matching lines @@
     }
 
     PrintIntProperty("loop_depth", current->loop_depth());
 
     const InstructionBlock* instruction_block =
         instructions->InstructionBlockAt(
             RpoNumber::FromInt(current->rpo_number()));
     if (instruction_block->code_start() >= 0) {
       int first_index = instruction_block->first_instruction_index();
       int last_index = instruction_block->last_instruction_index();
-      PrintIntProperty("first_lir_id", LifetimePosition::FromInstructionIndex(
-                                           first_index).Value());
-      PrintIntProperty("last_lir_id", LifetimePosition::FromInstructionIndex(
-                                          last_index).Value());
+      PrintIntProperty(
+          "first_lir_id",
+          LifetimePosition::GapFromInstructionIndex(first_index).Value());
+      PrintIntProperty("last_lir_id",
+                       LifetimePosition::InstructionFromInstructionIndex(
+                           last_index).Value());
     }
 
     {
       Tag states_tag(this, "states");
       Tag locals_tag(this, "locals");
       int total = 0;
       for (BasicBlock::const_iterator i = current->begin(); i != current->end();
            ++i) {
         if ((*i)->opcode() == IrOpcode::kPhi) total++;
       }
@@ skipping 205 matching lines @@
         os << "#" << SafeId(i) << ":" << SafeMnemonic(i);
       }
       os << ")" << std::endl;
     }
   }
   return os;
 }
 }
 }
 }  // namespace v8::internal::compiler