Get rid of the "spare buffer" cache.

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 2479 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
-  if (buffer_size_ < 4*KB) {
-    desc.buffer_size = 4*KB;
+  if (buffer_size_ == 0) {
+    desc.buffer_size = kMinimalBufferSize;
   } else {
     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())) {
     V8::FatalProcessOutOfMemory("Assembler::GrowBuffer");
   }
 
   // Set up new buffer.
   desc.buffer = NewArray<byte>(desc.buffer_size);
   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
   // sure to get into problems if we ever run uninitialized code.
 #ifdef DEBUG
   memset(desc.buffer, 0xCC, desc.buffer_size);
 #endif
 
   // Copy the data.
   int pc_delta = desc.buffer - buffer_;
   int rc_delta = (desc.buffer + desc.buffer_size) - (buffer_ + buffer_size_);
   MemMove(desc.buffer, buffer_, desc.instr_size);
   MemMove(rc_delta + reloc_info_writer.pos(), reloc_info_writer.pos(),
           desc.reloc_size);
 
-  // Switch buffers.
-  if (isolate()->assembler_spare_buffer() == NULL &&
-      buffer_size_ == kMinimalBufferSize) {
-    isolate()->set_assembler_spare_buffer(buffer_);
-  } else {
-    DeleteArray(buffer_);
-  }
+  DeleteArray(buffer_);
   buffer_ = desc.buffer;
   buffer_size_ = desc.buffer_size;
   pc_ += pc_delta;
   reloc_info_writer.Reposition(reloc_info_writer.pos() + rc_delta,
                                reloc_info_writer.last_pc() + pc_delta);
 
   // Relocate runtime entries.
   for (RelocIterator it(desc); !it.done(); it.next()) {
     RelocInfo::Mode rmode = it.rinfo()->rmode();
     if (rmode == RelocInfo::INTERNAL_REFERENCE) {
@@ skipping 123 matching lines @@
     fprintf(coverage_log, "%s\n", file_line);
     fflush(coverage_log);
   }
 }
 
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32