r254859 - in /trunk/gcc: ChangeLog config/arm/a...

[thopre01@gcc.gnu.org]

Author: thopre01
Date: Fri Nov 17 10:00:02 2017
New Revision: 254859

URL: https://gcc.gnu.org/viewcvs?rev=254859&root=gcc&view=rev
Log:
[ARM] Fix ICE in Armv8-M Security Extensions code

Commit r253825 which introduced some sanity checks for sbitmap revealed
a bug in the conversion of cmse_nonsecure_entry_clear_before_return ()
to using bitmap structure. bitmap_and expects that the two bitmaps have
the same length, yet the code in
cmse_nonsecure_entry_clear_before_return () have different size for
to_clear_bitmap and to_clear_arg_regs_bitmap, with the assumption that
bitmap_and would behave has if the bits not allocated were in fact zero.
This commit makes sure both bitmap are equally sized.

2017-11-17  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * config/arm/arm.c (cmse_nonsecure_entry_clear_before_return): Allocate
    to_clear_arg_regs_bitmap to the same size as to_clear_bitmap.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm.c