[Bug target/19008] New: [3.3 regression] [arm] gcc-3.3 -O3 -fPIC produce wrong code via auto inlining

[debian-gcc at lists dot debian dot org]

[forwarded from http://bugs.debian.org/285238]

works with 3.4.3

gcc-3.3 -O3 -fPIC miscompile pari on ARM.
(see 
<http://buildd.debian.org/fetch.php?&pkg=pari&ver=2.1.6-1&arch=arm&stamp=1102707589&file=log&as=raw>)

More precisely the file src/basemath/alglin1.c
is miscompiled with -O3 -fPIC but correctly compiled with -O3 or -O2 -fPIC

This is a regression since gcc-3.3_1:3.3.2-0pre5 built the same
file correctly with -O3 -fPIC.

Apparenlty gcc inline the function use_maximal_pivot() inside
gauss_pivot_ker() and produce wrong code there.

Removing the static qualifier from use_maximal_pivot() (thus forbidding
the compiler to enable) work around the bug.

-- 
           Summary: [3.3 regression] [arm] gcc-3.3 -O3 -fPIC produce wrong
                    code via auto inlining
           Product: gcc
           Version: 3.3.5
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: arm-linux
  GCC host triplet: arm-linux
GCC target triplet: arm-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19008