Add --trace flag to fast compiler.

src/arm/fast-codegen-arm.cc

 // Copyright 2009 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 71 matching lines @@
            Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()),
                    RelocInfo::CODE_TARGET),
            LeaveCC,
            lo);
   }
 
   { Comment cmnt(masm_, "[ Declarations");
     VisitDeclarations(fun->scope()->declarations());
   }
 
+  if (FLAG_trace) {
+    __ CallRuntime(Runtime::kTraceEnter, 0);
+  }
+
   { Comment cmnt(masm_, "[ Body");
     VisitStatements(fun->body());
   }
 
   { Comment cmnt(masm_, "[ return <undefined>;");
     // Emit a 'return undefined' in case control fell off the end of the
     // body.
     __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
     SetReturnPosition(fun);
+    if (FLAG_trace) {
+      // Push the return value on the stack as the parameter.
+      // Runtime::TraceExit returns its parameter in r0.
+      __ push(r0);
+      __ CallRuntime(Runtime::kTraceExit, 1);
+    }
+
     __ RecordJSReturn();
     __ mov(sp, fp);
     __ ldm(ia_w, sp, fp.bit() | lr.bit());
     int num_parameters = function_->scope()->num_parameters();
     __ add(sp, sp, Operand((num_parameters + 1) * kPointerSize));
     __ Jump(lr);
   }
 }
 
 
@@ skipping 32 matching lines @@
   // Complete the statement based on the location of the subexpression.
   Location source = expr->location();
   ASSERT(!source.is_nowhere());
   if (source.is_temporary()) {
     __ pop(r0);
   } else {
     ASSERT(source.is_constant());
     ASSERT(expr->AsLiteral() != NULL);
     __ mov(r0, Operand(expr->AsLiteral()->handle()));
   }
+
+  if (FLAG_trace) {
+    // Push the return value on the stack as the parameter.
+    // Runtime::TraceExit returns its parameter in r0.
+    __ push(r0);
+    __ CallRuntime(Runtime::kTraceExit, 1);
+  }
+
   __ RecordJSReturn();
   __ mov(sp, fp);
   __ ldm(ia_w, sp, fp.bit() | lr.bit());
     int num_parameters = function_->scope()->num_parameters();
   __ add(sp, sp, Operand((num_parameters + 1) * kPointerSize));
   __ Jump(lr);
 }
 
 
 void FastCodeGenerator::VisitFunctionLiteral(FunctionLiteral* expr) {
@@ skipping 185 matching lines @@
   __ CallRuntime(function, arg_count);
   if (expr->location().is_temporary()) {
     __ push(r0);
   } else {
     ASSERT(expr->location().is_nowhere());
   }
 }
 
 
 } }  // namespace v8::internal