Fix build with GCC 4.7, which fails with "narrowing conversion of

src/full-codegen.cc

 // Copyright 2011 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 344 matching lines @@
   PrepareForBailoutForId(call->ReturnId(), TOS_REG);
 #ifdef DEBUG
   // In debug builds, mark the return so we can verify that this function
   // was called.
   ASSERT(!call->return_is_recorded_);
   call->return_is_recorded_ = true;
 #endif
 }
 
 
-void FullCodeGenerator::PrepareForBailoutForId(int id, State state) {
+void FullCodeGenerator::PrepareForBailoutForId(unsigned id, State state) {
   // There's no need to prepare this code for bailouts from already optimized
   // code or code that can't be optimized.
   if (!FLAG_deopt || !info_->HasDeoptimizationSupport()) return;
   unsigned pc_and_state =
       StateField::encode(state) | PcField::encode(masm_->pc_offset());
   BailoutEntry entry = { id, pc_and_state };
 #ifdef DEBUG
   // Assert that we don't have multiple bailout entries for the same node.
   for (int i = 0; i < bailout_entries_.length(); i++) {
     if (bailout_entries_.at(i).id == entry.id) {
       AstPrinter printer;
       PrintF("%s", printer.PrintProgram(info_->function()));
       UNREACHABLE();
     }
   }
 #endif  // DEBUG
   bailout_entries_.Add(entry);
 }
 
 
-void FullCodeGenerator::RecordStackCheck(int ast_id) {
+void FullCodeGenerator::RecordStackCheck(unsigned ast_id) {
   // The pc offset does not need to be encoded and packed together with a
   // state.
-  BailoutEntry entry = { ast_id, masm_->pc_offset() };
+  BailoutEntry entry = { ast_id, static_cast<unsigned>(masm_->pc_offset()) };

[Steven, 2011/11/30 17:50:42]

The static_cast is ok. All the stack check table entries have unsigned offsets.
Good to have an ASSERT(masm_->pc_offset()) though.

   stack_checks_.Add(entry);
 }
 
 
 bool FullCodeGenerator::ShouldInlineSmiCase(Token::Value op) {
   // Inline smi case inside loops, but not division and modulo which
   // are too complicated and take up too much space.
   if (op == Token::DIV ||op == Token::MOD) return false;
   if (FLAG_always_inline_smi_code) return true;
   return loop_depth_ > 0;
@@ skipping 901 matching lines @@
   }
 
   return false;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal