[Bug rtl-optimization/59649] [4.9 regression] conftest.c miscompiled

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59649

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, IMHO either get_mode_bounds needs to special case BImode like
trunc_int_for_mode does and make the bounds of BImode include values of 0 and
STORE_FLAG_VALUE, or the BImode hunk in trunc_int_for_mode needs to be dropped
and everything analyzed for assumption that BImode true is CONST_INT equal to
STORE_FLAG_VALUE, or ia64 needs to use STORE_FLAG_VALUE -1 (there is a comment
about it in ia64.h that it should be investigated).