public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug tree-optimization/102725] New: [12 Regression] -fno-builtin leads to call of strlen since r12-4283-g6f966f06146be768
@ 2021-10-13  8:18 marxin at gcc dot gnu.org
  2021-10-13  8:31 ` [Bug tree-optimization/102725] " pinskia at gcc dot gnu.org
                   ` (11 more replies)
  0 siblings, 12 replies; 13+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-10-13  8:18 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102725

            Bug ID: 102725
           Summary: [12 Regression] -fno-builtin leads to call of strlen
                    since r12-4283-g6f966f06146be768
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: stefansf at linux dot ibm.com
  Target Milestone: ---

I noticed that in valgrind package, where they define their own standard
library functions.

$ cat strlen.c
#include <stddef.h>

size_t mystrlen ( const char* str )
{
   size_t i = 0;
   while (str[i] != 0) i++;
   return i;
}

int main(int argc, char **argv)
{
  return mystrlen (argv[0]);
}

$ gcc strlen.c  -O3  -fno-builtin -S && grep "call.*strlen" strlen.s
        call    strlen
        call    strlen

Before your revision, no strlen was called.

^ permalink raw reply	[flat|nested] 13+ messages in thread
end of thread, other threads:[~2023-12-17 19:56 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-10-13  8:18 [Bug tree-optimization/102725] New: [12 Regression] -fno-builtin leads to call of strlen since r12-4283-g6f966f06146be768 marxin at gcc dot gnu.org
2021-10-13  8:31 ` [Bug tree-optimization/102725] " pinskia at gcc dot gnu.org
2021-10-13  8:38 ` [Bug tree-optimization/102725] " marxin at gcc dot gnu.org
2021-10-13  8:46 ` pinskia at gcc dot gnu.org
2021-10-13 11:36 ` rguenth at gcc dot gnu.org
2021-12-29 13:11 ` marxin at gcc dot gnu.org
2022-07-18 22:44 ` pinskia at gcc dot gnu.org
2023-02-08 17:45 ` pinskia at gcc dot gnu.org
2023-06-03  0:42 ` vincent.riviere at freesbee dot fr
2023-06-03  1:16 ` pinskia at gcc dot gnu.org
2023-06-03  1:56 ` terra at gnome dot org
2023-12-17 17:58 ` pinskia at gcc dot gnu.org
2023-12-17 19:56 ` gjl at gcc dot gnu.org

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).