r270609 - in /branches/gcc-8-branch/gcc: Change...

[zhroma@gcc.gnu.org]

Author: zhroma
Date: Fri Apr 26 16:04:54 2019
New Revision: 270609

URL: https://gcc.gnu.org/viewcvs?rev=270609&root=gcc&view=rev
Log:
Backport modulo-sched fixes from mainline

2019-04-23  Roman Zhuykov  <zhroma@ispras.ru>

modulo-sched: prevent division by zero (PR87979)

	PR rtl-optimization/87979
	* modulo-sched.c (sms_schedule): Start ii value "mii" should
	not equal zero.

modulo-sched: fix branch scheduling issue (PR84032)

	PR rtl-optimization/84032
	* modulo-sched.c (ps_insn_find_column): Change condition so that
	branch will always be the last insn in a row inside partial
	schedule.

gcc/testsuite:

	PR rtl-optimization/87979
	* gcc.dg/pr87979.c: New test.

	PR rtl-optimization/84032
	* gcc.dg/pr84032.c: New test.

Added:
    branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr84032.c
    branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr87979.c
Modified:
    branches/gcc-8-branch/gcc/ChangeLog
    branches/gcc-8-branch/gcc/modulo-sched.c
    branches/gcc-8-branch/gcc/testsuite/ChangeLog