public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r12-7991] testsuite: Add -fno-tree-loop-distribute-patterns.
@ 2022-04-05 6:52 Robin Dapp
0 siblings, 0 replies; only message in thread
From: Robin Dapp @ 2022-04-05 6:52 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:321d1dcf610d8af8da4c1feb76819fea24fcd27e
commit r12-7991-g321d1dcf610d8af8da4c1feb76819fea24fcd27e
Author: Robin Dapp <rdapp@linux.ibm.com>
Date: Fri Apr 1 09:52:56 2022 +0200
testsuite: Add -fno-tree-loop-distribute-patterns.
In gcc.dg/Wuse-after-free-2.c we try to detect a use-after-free. The
test's while loop is converted into a rawmemchr builtin making
it impossible to determine that the pointers *p and *q are related.
Therefore, disable the tree loop distribute patterns pass for this test.
gcc/testsuite/ChangeLog:
* gcc.dg/Wuse-after-free-2.c:
Add -fno-tree-loop-distribute-patterns in order to avoid
rawmemchr.
Diff:
---
gcc/testsuite/gcc.dg/Wuse-after-free-2.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/gcc/testsuite/gcc.dg/Wuse-after-free-2.c b/gcc/testsuite/gcc.dg/Wuse-after-free-2.c
index 9f7ed4529f0..68ec75845ce 100644
--- a/gcc/testsuite/gcc.dg/Wuse-after-free-2.c
+++ b/gcc/testsuite/gcc.dg/Wuse-after-free-2.c
@@ -1,6 +1,6 @@
/* PR middle-end/104232 - spurious -Wuse-after-free after conditional free
{ dg-do compile }
- { dg-options "-O2 -Wall" } */
+ { dg-options "-O2 -Wall -fno-tree-loop-distribute-patterns" } */
void free (void*);
@@ -107,6 +107,8 @@ int warn_cond_loop (char *p)
{
char *q = p;
+ /* -fno-tree-loop-distribute-patterns ensures this does not get converted
+ into rawmemchr (making q and p unrelated). */
while (*q)
++q;
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2022-04-05 6:52 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-04-05 6:52 [gcc r12-7991] testsuite: Add -fno-tree-loop-distribute-patterns Robin Dapp
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).