[compiler] Properly guard the speculative optimizations for instanceof.

src/full-codegen/ia32/full-codegen-ia32.cc

Index: src/full-codegen/ia32/full-codegen-ia32.cc
diff --git a/src/full-codegen/ia32/full-codegen-ia32.cc b/src/full-codegen/ia32/full-codegen-ia32.cc
index 26b6c0d65c27e8a658815b69dcd3b37bec5a632f..485703eb9369039114499dbd02bbb0e5f7e17ac8 100644
--- a/src/full-codegen/ia32/full-codegen-ia32.cc
+++ b/src/full-codegen/ia32/full-codegen-ia32.cc
@@ -3336,7 +3336,9 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
       VisitForAccumulatorValue(expr->right());
       SetExpressionPosition(expr);
       PopOperand(edx);
-      InstanceOfStub stub(isolate());
+      __ EmitLoadTypeFeedbackVector(ebx);
+      __ mov(edi, Immediate(SlotToIndex(expr->CompareOperationFeedbackSlot())));
+      InstanceOfWithFeedbackStub stub(isolate());
       __ CallStub(&stub);
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ cmp(eax, isolate()->factory()->true_value());