[Bug target/51753] New: Many gcc.dg/simultate-thread tests fail on Solaris 10+/x86

["ro at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51753

             Bug #: 51753
           Summary: Many gcc.dg/simultate-thread tests fail on Solaris
                    10+/x86
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ro@gcc.gnu.org
                CC: ubizjak@gmail.com
              Host: i386-pc-solaris2.1[01]
            Target: i386-pc-solaris2.1[01]
             Build: i386-pc-solaris2.1[01]


Many of the new gcc.dg/simulate-thread tests FAIL on Solaris 10 and 11/x86,
both 32 and 64-bit:

FAIL: gcc.dg/simulate-thread/atomic-other-int.c  -O1 -g  thread simulation test
FAIL: gcc.dg/simulate-thread/atomic-other-int.c  -O2 -g  thread simulation test
FAIL: gcc.dg/simulate-thread/atomic-other-int.c  -O3 -g  thread simulation test
FAIL: gcc.dg/simulate-thread/atomic-other-int.c  -Os -g  thread simulation test
FAIL: gcc.dg/simulate-thread/atomic-other-longlong.c  -O0 -g  thread simulation
test
FAIL: gcc.dg/simulate-thread/atomic-other-longlong.c  -O1 -g  thread simulation
test
FAIL: gcc.dg/simulate-thread/atomic-other-longlong.c  -O2 -g  thread simulation
test
FAIL: gcc.dg/simulate-thread/atomic-other-longlong.c  -O3 -g  thread simulation
test
FAIL: gcc.dg/simulate-thread/atomic-other-longlong.c  -Os -g  thread simulation
test
FAIL: gcc.dg/simulate-thread/atomic-other-short.c  -O1 -g  thread simulation
test
FAIL: gcc.dg/simulate-thread/atomic-other-short.c  -O2 -g  thread simulation
test
FAIL: gcc.dg/simulate-thread/atomic-other-short.c  -O3 -g  thread simulation
test
FAIL: gcc.dg/simulate-thread/atomic-other-short.c  -Os -g  thread simulation
test

This happens neither on Solaris 8 and 9/x86 (32-bit only), nor on
x86_64-unknown-linux-gnu or i686-unknown-linux-gnu, using gdb 7.3.1 everywhere.

E.g. in atomic-other-int.c, the __atomic_fetch_sub FAILs; if I add logging code
to test_abort, I find

FAIL: invalid intermediate result for value

  value = 1 ret = 0


I'm uncertain if this is a code generation issue or a problem on the gdb side.

  Rainer