From: Kewen Lin <linkw@linux.ibm.com>
Date: Thu, 24 Mar 2022 01:46:06 +0000 (-0500)
Subject: rs6000: Skip overload instances with NULL fntype [PR104967]
X-Git-Tag: basepoints/gcc-13~521
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=497bde3ab92b2c292f78672db341bbb7cc1bcf1f;p=thirdparty%2Fgcc.git

rs6000: Skip overload instances with NULL fntype [PR104967]

For some overload built-in function instance, if it requires
a data type which isn't defined on the target, its fntype
would be initialized as NULL.  This patch is to consider
this possibility in function find_instance, as shown in
PR104967.

	PR target/104967

gcc/ChangeLog:

	* config/rs6000/rs6000-c.cc (find_instance): Skip instances with null
	function types.
---

diff --git a/gcc/config/rs6000/rs6000-c.cc b/gcc/config/rs6000/rs6000-c.cc
index 2f0f4fe337d1..84bb98f94fb6 100644
--- a/gcc/config/rs6000/rs6000-c.cc
+++ b/gcc/config/rs6000/rs6000-c.cc
@@ -1686,6 +1686,10 @@ find_instance (bool *unsupported_builtin, ovlddata **instance,
 
   ovlddata *inst = *instance;
   gcc_assert (inst != NULL);
+  /* It is possible for an instance to require a data type that isn't
+     defined on this target, in which case inst->fntype will be NULL.  */
+  if (!inst->fntype)
+    return error_mark_node;
   tree fntype = rs6000_builtin_info[inst->bifid].fntype;
   tree parmtype0 = TREE_VALUE (TYPE_ARG_TYPES (fntype));
   tree parmtype1 = TREE_VALUE (TREE_CHAIN (TYPE_ARG_TYPES (fntype)));