[wasm] Produce debug name in debug builds.

src/compiler/wasm-compiler.cc

 // Copyright 2015 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/wasm-compiler.h"
 
 #include "src/isolate-inl.h"
 
 #include "src/base/platform/platform.h"
 
@@ skipping 2114 matching lines @@
     thrower.Failed(buffer.start(), result);
     return Handle<Code>::null();
   }
 
   // Run the compiler pipeline to generate machine code.
   CallDescriptor* descriptor = const_cast<CallDescriptor*>(
       module_env->GetWasmCallDescriptor(&zone, function.sig));
   Code::Flags flags = Code::ComputeFlags(Code::WASM_FUNCTION);
   // add flags here if a meaningful name is helpful for debugging.
   bool debugging =
+#if DEBUG
+      true ||

[bradnelson, 2016/02/17 02:54:21]

Seems prone to getting separated, #if #else ?

[Mircea Trofin, 2016/02/17 03:08:33]

Done.

+#endif
       FLAG_print_opt_code || FLAG_trace_turbo || FLAG_trace_turbo_graph;
   const char* func_name = "wasm";
   Vector<char> buffer;
   if (debugging) {
     buffer = Vector<char>::New(128);
     SNPrintF(buffer, "WASM_function_#%d:%s", function.func_index,
              module_env->module->GetName(function.name_offset));
     func_name = buffer.start();
   }
   CompilationInfo info(func_name, isolate, &zone, flags);
 
   Handle<Code> code =
       Pipeline::GenerateCodeForTesting(&info, descriptor, &graph);
   if (debugging) {
     buffer.Dispose();
   }
   if (!code.is_null()) {
     RecordFunctionCompilation(
         Logger::FUNCTION_TAG, &info, "WASM_function", function.func_index,
         module_env->module->GetName(function.name_offset));
   }
 
   return code;
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8