[Bug rtl-optimization/78617] LRA clobbers live register during rematerialization

[thopre01 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78617

--- Comment #4 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Author: thopre01
Date: Wed Dec  7 18:15:52 2016
New Revision: 243375

URL: https://gcc.gnu.org/viewcvs?rev=243375&root=gcc&view=rev
Log:
2016-12-07  Thomas Preud'homme  <thomas.preudho...@arm.com>

        Backport from mainline
        2016-12-07  Thomas Preud'homme  <thomas.preudho...@arm.com>

        gcc/
        PR rtl-optimization/78617
        * lra-remat.c (do_remat): Initialize live_hard_regs from live in
        registers, also setting hard registers mapped to pseudo registers.

        gcc/testsuite/
        PR rtl-optimization/78617
        * gcc.c-torture/execute/pr78617.c: New test.


Added:
   
branches/ARM/embedded-6-branch/gcc/testsuite/gcc.c-torture/execute/pr78617.c
Modified:
    branches/ARM/embedded-6-branch/gcc/ChangeLog.arm
    branches/ARM/embedded-6-branch/gcc/lra-remat.c
    branches/ARM/embedded-6-branch/gcc/testsuite/ChangeLog.arm