Allocation site support for monomorphic StringAdds in BinaryOps.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index bba3acaa9a55ac059287d801acc552a7f6f70d69..0fd558794b2ad066f0a84d61d2cd867920f1d149 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -4918,7 +4918,7 @@ void LCodeGen::DoStringAdd(LStringAdd* instr) {
     ASSERT(ToRegister(instr->left()).is(edx));
     ASSERT(ToRegister(instr->right()).is(eax));
     NewStringAddStub stub(instr->hydrogen()->flags(),
-                          isolate()->heap()->GetPretenureMode());
+                          instr->hydrogen()->pretenure_flag());
     CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr);
   } else {
     EmitPushTaggedOperand(instr->left());