[PATCH] Fix PR91004

[Richard Biener]

This fixes

FAIL: g++.dg/torture/pr34850.C   -O2  (test for excess errors)
FAIL: g++.dg/torture/pr34850.C   -O3 -g  (test for excess errors)
FAIL: g++.dg/torture/pr34850.C   -Os  (test for excess errors)
FAIL: g++.dg/torture/pr34850.C   -O2 -flto -fno-use-linker-plugin 
-flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/pr34850.C   -O2 -flto -fuse-linker-plugin 
-fno-fat-lto-objects  (test for excess errors)

by reducing the testcase a bit less.

Tested on x86_64-unknown-linux-gnu, applied to trunk.

2019-06-27  Richard Biener  <rguenther@suse.de>

	PR testsuite/91004
	* g++.dg/torture/pr34850.C: Fix overly reduced testcase.

Index: gcc/testsuite/g++.dg/torture/pr34850.C
===================================================================
--- gcc/testsuite/g++.dg/torture/pr34850.C	(revision 272732)
+++ gcc/testsuite/g++.dg/torture/pr34850.C	(working copy)
@@ -13,7 +13,8 @@ extern "C" {
     extern __inline __attribute__ ((__always_inline__)) __attribute__ ((__gnu_inline__, __artificial__))
     void * memset (void *__dest, int __ch, size_t __len) throw () {
 	if (__builtin_constant_p (__len) && __len == 0)
-	    __warn_memset_zero_len ();
+	  __warn_memset_zero_len ();
+	return __dest;
     }
 }
 inline void clear_mem(void* ptr, u32bit n)    {