[Courgette] Using LabelManager to reduce Courgette-apply peak RAM by 25%.

courgette/disassembler_elf_32_x86.cc

 // Copyright (c) 2012 The Chromium 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 "courgette/disassembler_elf_32_x86.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
 #include "base/logging.h"
 #include "courgette/assembly_program.h"
 #include "courgette/courgette.h"
 
 namespace courgette {
 
 CheckBool DisassemblerElf32X86::TypedRVAX86::ComputeRelativeTarget(
     const uint8_t* op_pointer) {
   set_relative_target(Read32LittleEndian(op_pointer) + 4);
   return true;
 }
 
 CheckBool DisassemblerElf32X86::TypedRVAX86::EmitInstruction(
     AssemblyProgram* program,
-    RVA target_rva) {
-  return program->EmitRel32(program->FindOrMakeRel32Label(target_rva));
+    Label* label) {
+  return program->EmitRel32(label);
 }
 
 uint16_t DisassemblerElf32X86::TypedRVAX86::op_size() const {
   return 4;
 }
 
 DisassemblerElf32X86::DisassemblerElf32X86(const void* start, size_t length)
     : DisassemblerElf32(start, length) {
 }
 
@@ skipping 157 matching lines @@
         continue;
       }
     }
     p += 1;
   }
 
   return true;
 }
 
 }  // namespace courgette