From 957c437363f139313b2c0b2c93ca985df1d98ad2 Mon Sep 17 00:00:00 2001
From: Martin Sebor <msebor@redhat.com>
Date: Thu, 13 May 2021 10:38:09 -0600
Subject: PR c/100550 - ICE: in fold_convert_loc with function call VLA
 argument

gcc/c/ChangeLog:

	PR c/100550
	* c-decl.c (get_parm_array_spec): Avoid erroneous VLA bounds.

gcc/testsuite/ChangeLog:

	PR c/100550
	* gcc.dg/Wvla-parameter-9.c: New test.
---
 gcc/c/c-decl.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'gcc/c/c-decl.c')

diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c
index 3ea4708..53b2b5b 100644
--- a/gcc/c/c-decl.c
+++ b/gcc/c/c-decl.c
@@ -5856,6 +5856,9 @@ get_parm_array_spec (const struct c_parm *parm, tree attrs)
 	  spec += buf;
 	  break;
 	}
+      else if (!INTEGRAL_TYPE_P (TREE_TYPE (nelts)))
+	/* Avoid invalid NELTS.  */
+	return attrs;
 
       /* Each variable VLA bound is represented by a dollar sign.  */
       spec += "$";
-- 
cgit v1.1