re PR ipa/86389 (execute FAILs with -fipa-pta)

2018-07-03  Richard Biener  <rguenther@suse.de>

	PR ipa/86389
	* tree-ssa-structalias.c (find_func_clobbers): Properly
	handle indirect calls.

	* gcc.dg/torture/pr86389.c: New testcase.

From-SVN: r262341

gcc/ChangeLog

+2018-07-03  Richard Biener  <rguenther@suse.de>
+
+	PR ipa/86389
+	* tree-ssa-structalias.c (find_func_clobbers): Properly
+	handle indirect calls.
+
 2018-07-03  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* tree-vect-patterns.c (vect_recog_rotate_pattern)

gcc/testsuite/ChangeLog

+2018-07-03  Richard Biener  <rguenther@suse.de>
+
+	PR ipa/86389
+	* gcc.dg/torture/pr86389.c: New testcase.
+
 2018-07-03  Richard Sandiford  <richard.sandiford@arm.com>
 
 	PR tree-optimization/85694

gcc/testsuite/gcc.dg/torture/pr86389.c

+/* { dg-do run } */
+/* { dg-additional-options "-fipa-pta" } */
+
+void callme (void (*callback) (void));
+
+int
+main (void)
+{
+  int ok = 0;
+  void callback (void) { ok = 1; }
+
+  callme (&callback);
+
+  if (!ok)
+    __builtin_abort ();
+  return 0;
+}
+
+__attribute__((noinline, noclone))
+void
+callme (void (*callback) (void))
+{
+  (*callback) ();
+}

gcc/tree-ssa-structalias.c

@@ -5353,6 +5353,7 @@ find_func_clobbers (struct function *fn, gimple *origt)
       /* For callees without function info (that's external functions),
 	 ESCAPED is clobbered and used.  */
       if (cfi->decl
+	  && TREE_CODE (cfi->decl) == FUNCTION_DECL
 	  && !cfi->is_fn_info)
 	{
 	  varinfo_t vi;