[heap] Use size_t for heap and space counters.

src/ia32/assembler-ia32.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 2894 matching lines @@
 void Assembler::GrowBuffer() {
   DCHECK(buffer_overflow());
   if (!own_buffer_) FATAL("external code buffer is too small");
 
   // Compute new buffer size.
   CodeDesc desc;  // the new buffer
   desc.buffer_size = 2 * buffer_size_;
 
   // Some internal data structures overflow for very large buffers,
   // they must ensure that kMaximalBufferSize is not too large.
-  if ((desc.buffer_size > kMaximalBufferSize) ||
-      (desc.buffer_size > isolate()->heap()->MaxOldGenerationSize())) {
+  if (desc.buffer_size > kMaximalBufferSize ||
+      static_cast<size_t>(desc.buffer_size) >
+          isolate()->heap()->MaxOldGenerationSize()) {
     V8::FatalProcessOutOfMemory("Assembler::GrowBuffer");
   }
 
   // Set up new buffer.
   desc.buffer = NewArray<byte>(desc.buffer_size);
   desc.origin = this;
   desc.instr_size = pc_offset();
   desc.reloc_size = (buffer_ + buffer_size_) - (reloc_info_writer.pos());
 
   // Clear the buffer in debug mode. Use 'int3' instructions to make
@@ skipping 131 matching lines @@
   }
   RelocInfo rinfo(isolate(), pc_, rmode, data, NULL);
   reloc_info_writer.Write(&rinfo);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32