[Bug middle-end/59327] warning in expand_used_vars

[amylaar at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59327

--- Comment #2 from Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> ---
sz is HOST_WIDE_INT, ASAN_RED_ZONE_SIZE is an int literal, and data.asan_alignb
is an unsigned int.

With 32 bit int and HOST_WIDE_INT, this results in a 32 bit signed/unsigned
comparison.

When building a target with need_64bit_hwint (according to config.gcc),
on a host with 32 bit int, the right hand side of the comparison gets
sign extended to HOST_WIDE_INT, thus the warning will not show up when
testing such a combination / bootstrapping such a host/target.