MIPS: Less aggressive polling when concurrently compiling for OSR.

src/mips/builtins-mips.cc

Index: src/mips/builtins-mips.cc
diff --git a/src/mips/builtins-mips.cc b/src/mips/builtins-mips.cc
index 1b18140cbc310f57804ea2c79db6db671b812334..d565a914fabdfc68da2c7b2311f602357618fe4b 100644
--- a/src/mips/builtins-mips.cc
+++ b/src/mips/builtins-mips.cc
@@ -966,6 +966,24 @@ void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
 }
 
 
+void Builtins::Generate_OsrAfterStackCheck(MacroAssembler* masm) {
+  // We check the stack limit as indicator that recompilation might be done.
+  Label ok;
+  __ stop("check1");

[Yang, 2013/09/25 14:54:38]

You probably want to remove this :)

[Paul Lind, 2013/09/25 15:05:00]

You probably should remove this ... ;-)
 ... thanks Yang, you beat me to this!

[kilvadyb, 2013/09/25 15:14:28]

Done.

+  __ LoadRoot(at, Heap::kStackLimitRootIndex);
+  __ Branch(&ok, hs, sp, Operand(at));
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ CallRuntime(Runtime::kStackGuard, 0);
+  }
+  __ Jump(masm->isolate()->builtins()->OnStackReplacement(),
+          RelocInfo::CODE_TARGET);
+
+  __ bind(&ok);
+  __ Ret();
+}
+
+
 void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
   // 1. Make sure we have at least one argument.
   // a0: actual number of arguments