[Bug c/12864] New: tree-ssa miscompiling libiberty

[Bug c/12864] New: tree-ssa miscompiling libiberty

[green at redhat dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12864

           Summary: tree-ssa miscompiling libiberty
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: green at redhat dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu

A change that happened within the past day or so is causing gcc to miscompile
libiberty.

I discovered this while compiling an frv-elf toolchain with the tree-ssa native
Linux toolchain.

Check out uberbaum and configure/build an frv-elf gas with the tree-ssa native
tools.  Then run "make check" on gas.  All of the tests to recognize machine
instructions fail (although psuedo-ops are recognized).

Now make clean-libiberty and rebuild libiberty with a stable compiler.  Then
relink your gas and try "make check" again.  All tests should pass.


This is a very recent regression.  I'll upload the diffs between the working and
non-working compilers.

AG

[Bug c/12864] tree-ssa miscompiling libiberty

[green at redhat dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12864



------- Additional Comments From green at redhat dot com  2003-10-31 21:33 -------
Created an attachment (id=5030)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5030&action=view)
changelog diff between working and broken compilers

[Bug c/12864] tree-ssa miscompiling libiberty

[pinskia at gcc dot gnu dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12864


pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |wrong-code
   Last reconfirmed|0000-00-00 00:00:00         |2003-11-02 22:48:40
               date|                            |
   Target Milestone|---                         |tree-ssa

[Bug optimization/12864] tree-ssa miscompiling libiberty

[green at redhat dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12864


green at redhat dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


------- Additional Comments From green at redhat dot com  2003-11-05 06:14 -------
This appears to have been fixed somehow between Nov 3 and Nov 4.

Thanks!

AG