[Bug target/77904] [ARM Cortex-M0] Frame pointer thrashes registers if assembly statements with "sp" clobber are used

[thopre01 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77904

--- Comment #6 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Author: thopre01
Date: Tue Nov 22 10:57:55 2016
New Revision: 242694

URL: https://gcc.gnu.org/viewcvs?rev=242694&root=gcc&view=rev
Log:
Fix PR77904: callee-saved register trashed when clobbering sp

2016-11-22  Thomas Preud'homme  <thomas.preudho...@arm.com>

        Backport from mainline
        2016-11-22  Thomas Preud'homme  <thomas.preudho...@arm.com>

        gcc/
        PR target/77904
        * config/arm/arm.c (thumb1_compute_save_reg_mask): Mark frame pointer
        in save register mask if it is needed.

        gcc/testsuite/
        PR target/77904
        * gcc.target/arm/pr77904.c: New test.


Added:
    branches/ARM/embedded-6-branch/gcc/testsuite/gcc.target/arm/pr77904.c
Modified:
    branches/ARM/embedded-6-branch/gcc/ChangeLog.arm
    branches/ARM/embedded-6-branch/gcc/config/arm/arm.c
    branches/ARM/embedded-6-branch/gcc/testsuite/ChangeLog.arm