[Bug middle-end/52940] conversion from MODE_PARTIAL_INT uses sign extension for unsigned types

[bernds at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52940

--- Comment #2 from Bernd Schmidt <bernds at gcc dot gnu.org> 2012-04-26 14:20:50 UTC ---
Author: bernds
Date: Thu Apr 26 14:20:39 2012
New Revision: 186877

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186877
Log:
    PR middle-end/52940
    * machmode.h (CLASS_HAS_WIDER_MODES_P): True for MODE_PARTIAL_INT.
    * expr.c (convert_move): Honor unsignedp when extending partial int
    modes.
    * genmodes.c (complete_mode): Don't clear component field of partial
    int modes.
    (emit_mode_inner): Don't emit it however.
    (calc_wider_mode): Partial int modes widen to their component.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/expr.c
    trunk/gcc/genmodes.c
    trunk/gcc/machmode.h