[Bug rtl-optimization/25195] New: code fails at -O1, works at -O0

[duraid at octopus dot com dot au]

the ATerm library (not the terminal!) available here:

http://www.cwi.nl/projects/MetaEnv/aterm/aterm-2.4.2.tar.gz

seems to miscompile at -O1, but I cannot say for sure that this is not due to a
bug in the C code. To reproduce the failure, grab the above file and try:

export CC=gcc-4.0.2
export CFLAGS="-O1"
./configure; make; make check

this takes about a minute. On ia64-hpux, with GCC 4.0.2, 2 of the 4 test
programs fail. with GCC 3.4.4, only 1 of the 4 test programs fails. At -O0, all
tests pass with either compiler.

If anyone can shed some light on this I would really appreciate it, but I have
a funny feeling this might not be a GCC issue, so marking this minor.


-- 
           Summary: code fails at -O1, works at -O0
           Product: gcc
           Version: 4.0.2
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: duraid at octopus dot com dot au
  GCC host triplet: ia64-hp-hpux11.23


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25195