rs6000: Skip overload instances with uninitialized fntype (PR103622)

2022-01-05  Bill Schmidt  <wschmidt@linux.ibm.com>

gcc/
	PR target/103622
	* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
	Skip over instances with undefined function types.

diff --git a/gcc/config/rs6000/rs6000-c.c b/gcc/config/rs6000/rs6000-c.c
index db64af9..24a081c 100644 (file)
--- a/gcc/config/rs6000/rs6000-c.c
+++ b/gcc/config/rs6000/rs6000-c.c
@@ -2002,6 +2002,12 @@ altivec_resolve_overloaded_builtin (location_t loc, tree fndecl,
         the overloaded call to that instance.  */
       for (; instance != NULL; instance = instance->next)
        {
+         /* It is possible for an instance to require a data type that isn't
+            defined on this target, in which case instance->fntype will be
+            NULL.  */
+         if (!instance->fntype)
+           continue;
+
          bool mismatch = false;
          tree nextparm = TYPE_ARG_TYPES (instance->fntype);