[Bug rtl-optimization/88751] Performance regression reload vs lra

[krebbel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88751

--- Comment #9 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Fri Sep 20 12:18:26 2019
New Revision: 276000

URL: https://gcc.gnu.org/viewcvs?rev=276000&root=gcc&view=rev
Log:
Fix PR88751

This patch implements a small improvement for the heuristic in lra
which decides when it has to activate the simpler register allocation
algorithm.

gcc/ChangeLog:

2019-09-20  Andreas Krebbel  <krebbel@linux.ibm.com>

        Backport from mainline
        2019-06-06  Andreas Krebbel  <krebbel@linux.ibm.com>

        PR rtl-optimization/88751
        * ira.c (ira): Use the number of the actually referenced registers
        when calculating the threshold.


Modified:
    branches/gcc-9-branch/gcc/ChangeLog
    branches/gcc-9-branch/gcc/ira.c