util: Make unreachable at least be an assert

Previously, if __builtin_unreachable() was unavailable, the
unreachable macro was defined to do nothing. We do better here, by at
least still making it an assert.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

diff --git a/src/util/macros.h b/src/util/macros.h
index 5fc6729536cd6027dbd8aa84247c2f338b7f8084..eec8b9352cc4b14391521b8a87eb78a065de3c39 100644 (file)
--- a/src/util/macros.h
+++ b/src/util/macros.h
@@ -82,7 +82,7 @@ do {                        \
 #endif
 
 #ifndef unreachable
-#define unreachable(str)
+#define unreachable(str) assert(!str)
 #endif
 
 /**