default to use -mv4 when no version of Hexagon has been specified
This fixes a bunch of make check failures of the form:
Unknown Architecture Version.
UNREACHABLE executed at ../lib/Target/Hexagon/HexagonSubtarget.cpp:60!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160518 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Hexagon/HexagonSubtarget.cpp b/lib/Target/Hexagon/HexagonSubtarget.cpp
index ce81a78..5d087db 100644
--- a/lib/Target/Hexagon/HexagonSubtarget.cpp
+++ b/lib/Target/Hexagon/HexagonSubtarget.cpp
@@ -55,7 +55,11 @@
case HexagonSubtarget::V5:
break;
default:
- llvm_unreachable("Unknown Architecture Version.");
+ // If the programmer has not specified a Hexagon version, default
+ // to -mv4.
+ CPUString = "hexagonv4";
+ HexagonArchVersion = HexagonSubtarget::V4;
+ break;
}
// Initialize scheduling itinerary for the specified CPU.