[Bug tree-optimization/62114] [graphite] ICE using -floop-parallelize-all and -ffast-math

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62114

Matthias Klose <doko at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |doko at gcc dot gnu.org
      Known to fail|                            |4.8.3

--- Comment #4 from Matthias Klose <doko at gcc dot gnu.org> ---
this test case fails on the 4.8 and 4.9 branches, but succeeds with trunk
20140815.

$ cat tst.c  
int a, b;
fn1() {
  for (; a; a++)
    b |= 1;
}

$ gcc -c -Ofast -floop-parallelize-all tst.c   tst.c: In function 'fn1':
tst.c:2:1: internal compiler error: Segmentation fault
 fn1() {
 ^
Please submit a full bug report,
with preprocessed source if appropriate.


(gdb) bt
#0  0x0000000000cdf3ea in compute_deps(scop*, vec<poly_bb*, va_heap, vl_ptr>,
isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**,
isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**,
isl_union_map**, isl_union_map**, isl_union_map**, isl_union_map**) ()
#1  0x0000000000cdf913 in loop_is_parallel_p(loop*, hash_table<bb_pbb_hasher,
xcallocator>, int)
    ()
#2  0x0000000000cdd9fd in ?? ()
#3  0x0000000000cddd72 in gloog(scop*, hash_table<bb_pbb_hasher, xcallocator>)
()
#4  0x0000000000cdac09 in graphite_transform_loops() ()
#5  0x0000000000cdb0f7 in ?? ()
#6  0x0000000000818b3b in execute_one_pass(opt_pass*) ()
#7  0x0000000000818dd6 in execute_pass_list(opt_pass*) ()
#8  0x0000000000818de8 in execute_pass_list(opt_pass*) ()
#9  0x0000000000818de8 in execute_pass_list(opt_pass*) ()
#10 0x0000000000818de8 in execute_pass_list(opt_pass*) ()
#11 0x000000000063f656 in ?? ()
#12 0x0000000000640f4d in compile() ()
#13 0x00000000006413a5 in finalize_compilation_unit() ()
#14 0x00000000005648ec in c_write_global_declarations() ()
#15 0x00000000008b353d in ?? ()
#16 0x00000000008b50d0 in toplev_main(int, char**) ()
#17 0x00007ffff66e7b45 in __libc_start_main (main=0x552750 <main>, argc=18, 
    argv=0x7fffffffe588, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, 
    stack_end=0x7fffffffe578) at libc-start.c:287
#18 0x000000000055297f in _start ()