Don't perform OSR on intrinsified methods.

runtime/vm/code_generator.cc

Index: runtime/vm/code_generator.cc
===================================================================
--- runtime/vm/code_generator.cc	(revision 40833)
+++ runtime/vm/code_generator.cc	(working copy)
@@ -1209,7 +1209,9 @@
     // Since the code is referenced from the frame and the ZoneHandle,
     // it cannot have been removed from the function.
     ASSERT(function.HasCode());
-    if (!CanOptimizeFunction(function, isolate)) {
+    // Don't do OSR on intrinsified functions: The intrinsic code expects to be
+    // called like a regular function and can't be entered via OSR.
+    if (!CanOptimizeFunction(function, isolate) || function.is_intrinsic()) {
       return;
     }
     intptr_t osr_id =