r241735 - in /branches/gcc-6-branch/gcc: Change...

[ktkachov@gcc.gnu.org]

Author: ktkachov
Date: Tue Nov  1 10:29:40 2016
New Revision: 241735

URL: https://gcc.gnu.org/viewcvs?rev=241735&root=gcc&view=rev
Log:
[ree] PR rtl-optimization/78038: Handle global register dataflow definitions in ree

	Backport from mainline
	2016-10-21  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

	PR rtl-optimization/78038
	* ree.c (get_defs): Return NULL if a defining insn for REG cannot
	be deduced to set REG through the RTL structure.
	(make_defs_and_copies_lists): Return false on a failing get_defs call.

	* gcc.target/aarch64/pr78038.c: New test.


Added:
    branches/gcc-6-branch/gcc/testsuite/gcc.target/aarch64/pr78038.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/ree.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog