Merge "Fix SEGV when dumping MIR CFG"
diff --git a/compiler/dex/mir_graph.h b/compiler/dex/mir_graph.h
index f998005..a80c32d 100644
--- a/compiler/dex/mir_graph.h
+++ b/compiler/dex/mir_graph.h
@@ -467,7 +467,7 @@
   }
 
   bool IsConst(RegLocation loc) const {
-    return (IsConst(loc.orig_sreg));
+    return loc.orig_sreg < 0 ? false : IsConst(loc.orig_sreg);
   }
 
   int32_t ConstantValue(RegLocation loc) const {