[Bug rtl-optimization/82982] [8 Regression] ICE: qsort checking failed (error: qsort comparator non-negative on sorted output: 5) in ready_sort_real in haifa scheduler

[willschm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82982

Will Schmidt <willschm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |willschm at gcc dot gnu.org

--- Comment #4 from Will Schmidt <willschm at gcc dot gnu.org> ---
Tried to re-create locally, I've gotten two ICE's using the provided testcode
snippet, neither look quite like the originally reported issue.  (thus I don't
know if this is actually the same issue).

Neither of these require the -fgraphite-identity option be specified.  -m32 or
-m64 doesn't seem to matter for me. 

Target: powerpc64-unknown-linux-gnu
Configured with: /home/willschm/gcc/gcc-mainline-regtest_patches/configure
--enable-languages=c,c++,fortran,objc,obj-c++ --with-cpu=power7
--with-long-double-128
--prefix=/home/willschm/gcc/install/gcc-mainline-regtest_patches
--disable-bootstrap --with-isl --with-graphite : (reconfigured)
/home/willschm/gcc/gcc-mainline-regtest_patches/configure
--enable-languages=c,c++ --with-cpu=power7 --with-long-double-128
--prefix=/home/willschm/gcc/install/gcc-mainline-regtest_patches
--disable-bootstrap --with-isl --with-graphite

# with -O2.  
> $GCC_INSTALL/bin/gcc ./pr82982.c  -c -O2 -m32
during GIMPLE pass: store-merging
./pr82982.c: In function ‘km’:
./pr82982.c:4:1: internal compiler error: Segmentation fault
 km (void)
 ^~
0x10f75447 crash_signal
        /home/willschm/gcc/gcc-mainline-regtest_patches/gcc/toplev.c:325

# with -O3.
> $GCC_INSTALL/bin/gcc ./pr82982.c  -c -O3
during IPA pass: cp
./pr82982.c:31:1: internal compiler error: Segmentation fault
 }
 ^
0x10f75447 crash_signal
        /home/willschm/gcc/gcc-mainline-regtest_patches/gcc/toplev.c:325
0x103de084 tree_check(tree_node*, char const*, int, char const*, tree_code)
        /home/willschm/gcc/gcc-mainline-regtest_patches/gcc/tree.h:3131
0x10da9e77 opts_for_fn
        /home/willschm/gcc/gcc-mainline-regtest_patches/gcc/tree.h:5319
0x10dbe04b cgraph_node::optimize_for_size_p()
        /home/willschm/gcc/gcc-mainline-regtest_patches/gcc/cgraph.h:3152
0x11e50afb ipcp_cloning_candidate_p
        /home/willschm/gcc/gcc-mainline-regtest_patches/gcc/ipa-cp.c:709
0x11e50ef3 initialize_node_lattices
        /home/willschm/gcc/gcc-mainline-regtest_patches/gcc/ipa-cp.c:1177
0x11e5df7b ipcp_propagate_stage
        /home/willschm/gcc/gcc-mainline-regtest_patches/gcc/ipa-cp.c:3284
0x11e5e317 ipcp_driver
        /home/willschm/gcc/gcc-mainline-regtest_patches/gcc/ipa-cp.c:5026
0x11e5e3ff execute
        /home/willschm/gcc/gcc-mainline-regtest_patches/gcc/ipa-cp.c:5120