From: Jakub Jelinek <jakub@redhat.com>
Date: Fri, 30 Aug 2019 12:12:24 +0000 (+0200)
Subject: backport: re PR middle-end/89590 (ICE in maybe_emit_free_warning)
X-Git-Tag: releases/gcc-7.5.0~241
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=32ef02731361b79d9726f7372717e7a7cfba2943;p=thirdparty%2Fgcc.git

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

	Backported from mainline
	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.

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

From-SVN: r275122
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 29a1f92b1269..ab3d0d650771 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,12 @@
 2019-08-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	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.
+
 	2019-02-28  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/89520
diff --git a/gcc/builtins.c b/gcc/builtins.c
index 767093f539f9..fcc8d2294593 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -9774,6 +9774,9 @@ 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);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 17d8ee578dda..206a617043e4 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,11 @@
 2019-08-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2019-03-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/89590
+	* gcc.dg/pr89590.c: New test.
+
 	2019-02-28  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/89521
diff --git a/gcc/testsuite/gcc.dg/pr89590.c b/gcc/testsuite/gcc.dg/pr89590.c
new file mode 100644
index 000000000000..441b0f9c47e6
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr89590.c
@@ -0,0 +1,11 @@
+/* PR middle-end/89590 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -Wall -w" } */
+
+void free (void *);
+
+void
+foo (void)
+{
+  ((void (*)()) free) ();
+}