Optimize functions on a second thread.

src/ia32/builtins-ia32.cc

Index: src/ia32/builtins-ia32.cc
diff --git a/src/ia32/builtins-ia32.cc b/src/ia32/builtins-ia32.cc
index be46ff216f4b737771a4bddd4e97f815eed25733..41296b9581e86a6b6ae50dfefcd619f6ba7b43ae 100644
--- a/src/ia32/builtins-ia32.cc
+++ b/src/ia32/builtins-ia32.cc
@@ -74,6 +74,43 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
 }
 
 
+static void GenerateTailCallToSharedCode(MacroAssembler* masm) {
+  __ mov(eax, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
+  __ mov(eax, FieldOperand(eax, SharedFunctionInfo::kCodeOffset));
+  __ add(eax, Immediate(Code::kHeaderSize - kHeapObjectTag));

[Yang, 2012/07/19 12:47:30]

Use the lea instruction and FieldOperand would be easier to read.

[sanjoy, 2012/07/19 15:06:09]

Done.

+  __ jmp(eax);
+}
+
+
+void Builtins::Generate_InRecompileQueue(MacroAssembler* masm) {
+  GenerateTailCallToSharedCode(masm);
+}
+
+
+void Builtins::Generate_ParallelRecompile(MacroAssembler* masm) {
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+
+    // Push a copy of the function onto the stack.
+    __ push(edi);
+    // Push call kind information.
+    __ push(ecx);
+
+    __ push(edi);  // Function is also the parameter to the runtime call.
+    __ CallRuntime(Runtime::kParallelRecompile, 1);
+
+    // Restore call kind information.
+    __ pop(ecx);
+    // Restore receiver.
+    __ pop(edi);
+
+    // Tear down internal frame.
+  }
+
+  GenerateTailCallToSharedCode(masm);
+}
+
+
 static void Generate_JSConstructStubHelper(MacroAssembler* masm,
                                            bool is_api_function,
                                            bool count_constructions) {