public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c/31944]  New: Endless loop while building a 64-bit 2.6.20 kernel
@ 2007-05-15 23:14 aurelien at aurel32 dot net
  2007-05-16 10:08 ` [Bug rtl-optimization/31944] " aurelien at aurel32 dot net
                   ` (32 more replies)
  0 siblings, 33 replies; 34+ messages in thread
From: aurelien at aurel32 dot net @ 2007-05-15 23:14 UTC (permalink / raw)
  To: gcc-bugs

The file fs/ocfs2/dlm/dlmmaster.c from the 2.6.20 kernel triggers an endless
loop in gcc 4.1 built for the hppa64-linux-gnu target.

It occurs at -O2, but not at -O1 or -O0. Also specifying -fno-cse-follow-jumps
workaround the problem.


Thanks to Randolph Chung we have a reduced testcase:

struct bug { int type; };

static void stuck(struct bug *mle, void *res)
{
 if (mle->type == 1) {
  if (res == 0) asm volatile("nop");
 } 
 else if (mle->type == 0) {
  if (res == 0) {
    asm volatile("nop" : : "i" (0)); 
  }
 }
}

void foo(void) { stuck(0, 0); }
void bar(void) { stuck(0, 0); }


And some infos about the compiler used:

Using built-in specs.
Target: hppa64-linux-gnu
Configured with: ../src/configure --enable-languages=c --prefix=/usr
--libexecdir=/usr/lib --disable-shared --disable-nls --disable-threads
--disable-libffi --disable-libgomp --disable-libmudflap --disable-libssp
--with-as=/usr/bin/hppa64-linux-gnu-as --with-ld=/usr/bin/hppa64-linux-gnu-ld
--includedir=/usr/hppa64-linux-gnu/include --host=hppa-linux-gnu
--build=hppa-linux-gnu --target=hppa64-linux-gnu
Thread model: single
gcc version 4.1.3 20070429 (prerelease) (Debian 4.1.2-6)


-- 
           Summary: Endless loop while building a 64-bit 2.6.20 kernel
           Product: gcc
           Version: 4.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: aurelien at aurel32 dot net
 GCC build triplet: hppa1.1-linux-gnu
  GCC host triplet: hppa1.1-linux-gnu
GCC target triplet: hppa64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31944


^ permalink raw reply	[flat|nested] 34+ messages in thread
end of thread, other threads:[~2008-01-14 12:23 UTC | newest]

Thread overview: 34+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2007-05-15 23:14 [Bug c/31944] New: Endless loop while building a 64-bit 2.6.20 kernel aurelien at aurel32 dot net
2007-05-16 10:08 ` [Bug rtl-optimization/31944] " aurelien at aurel32 dot net
2007-05-17  2:55 ` danglin at gcc dot gnu dot org
2007-05-20 16:38 ` danglin at gcc dot gnu dot org
2007-05-20 17:15 ` danglin at gcc dot gnu dot org
2007-05-20 18:02 ` danglin at gcc dot gnu dot org
2007-05-20 20:31 ` danglin at gcc dot gnu dot org
2007-12-05 20:33 ` [Bug rtl-optimization/31944] [4.1/4.2/4.3 Regression] " danglin at gcc dot gnu dot org
2007-12-05 21:51 ` rguenth at gcc dot gnu dot org
2007-12-05 22:29 ` steven at gcc dot gnu dot org
2007-12-15 23:17 ` dave at hiauly1 dot hia dot nrc dot ca
2007-12-26  1:34 ` pinskia at gcc dot gnu dot org
2008-01-01  2:11 ` [Bug rtl-optimization/31944] [4.1/4.2 " danglin at gcc dot gnu dot org
2008-01-01 17:00 ` rguenther at suse dot de
2008-01-01 21:34 ` [Bug rtl-optimization/31944] [4.1/4.2/4.3 " danglin at gcc dot gnu dot org
2008-01-08 16:18 ` steven at gcc dot gnu dot org
2008-01-08 16:45 ` rguenth at gcc dot gnu dot org
2008-01-09 15:54 ` rguenth at gcc dot gnu dot org
2008-01-09 19:23 ` steven at gcc dot gnu dot org
2008-01-10  1:00 ` steven at gcc dot gnu dot org
2008-01-10 23:59 ` janis at gcc dot gnu dot org
2008-01-11  1:02 ` steven at gcc dot gnu dot org
2008-01-11  1:03 ` janis at gcc dot gnu dot org
2008-01-11  1:08 ` steven at gcc dot gnu dot org
2008-01-11  1:24 ` steven at gcc dot gnu dot org
2008-01-11 19:13 ` ebotcazou at gcc dot gnu dot org
2008-01-11 19:46 ` ebotcazou at gcc dot gnu dot org
2008-01-11 21:52 ` dave at hiauly1 dot hia dot nrc dot ca
2008-01-12  4:00 ` steven at gcc dot gnu dot org
2008-01-12  8:36 ` ebotcazou at gcc dot gnu dot org
2008-01-14 12:36 ` ebotcazou at gcc dot gnu dot org
2008-01-14 12:46 ` ebotcazou at gcc dot gnu dot org
2008-01-14 12:46 ` ebotcazou at gcc dot gnu dot org
2008-01-14 12:48 ` ebotcazou at gcc dot gnu dot 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).