re PR middle-end/89590 (ICE in maybe_emit_free_warning)

	PR middle-end/89590
	* builtins.c (maybe_emit_free_warning): Punt if free doesn't have
	exactly one argument.

	* gcc.dg/pr89590.c: New test.

From-SVN: r269392

gcc/ChangeLog

 2019-03-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/89590
+	* builtins.c (maybe_emit_free_warning): Punt if free doesn't have
+	exactly one argument.
+
+2019-03-05  Jakub Jelinek  <jakub@redhat.com>
 	    Richard Sandiford  <richard.sandiford@arm.com>
 
 	PR tree-optimization/89570

gcc/builtins.c

@@ -10604,6 +10604,9 @@ maybe_emit_sprintf_chk_warning (tree exp, enum built_in_function fcode)
 static void
 maybe_emit_free_warning (tree exp)
 {
+  if (call_expr_nargs (exp) != 1)
+    return;
+
   tree arg = CALL_EXPR_ARG (exp, 0);
 
   STRIP_NOPS (arg);

gcc/testsuite/ChangeLog

+2019-03-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/89590
+	* gcc.dg/pr89590.c: New test.
+
 2019-03-05  Wilco Dijkstra  <wdijkstr@arm.com>
 
 	PR target/89222

gcc/testsuite/gcc.dg/pr89590.c

+/* PR middle-end/89590 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -Wall -w" } */
+
+void free (void *);
+
+void
+foo (void)
+{
+  ((void (*)()) free) ();
+}