dojump.c (do_jump): If the expression being compared against zero...
* dojump.c (do_jump): If the expression being compared against
zero, is the subreg of a promoted variable, perform the comparison
in the promoted mode.
* simplify-rtx.c (simplify_unary_operation): Optimize sign and
zero-extensions of subregs of promoted variables where the
extension is identical to that used to promote the variable.
git://gcc.gnu.org / gcc.git / commit