r257137 - in /branches/gcc-6-branch/gcc: Change...

[amodra@gcc.gnu.org]

Author: amodra
Date: Mon Jan 29 04:31:18 2018
New Revision: 257137

URL: https://gcc.gnu.org/viewcvs?rev=257137&root=gcc&view=rev
Log:
[PATCH] PR84033, powerpc64le -moptimize-swaps bad code with vec_vbpermq

vbpermq produces its output in bits 48..63 of the target vector reg,
so the output cannot be lane swapped.

gcc/
	PR target/84033
	* config/rs6000/rs6000.c (rtx_is_swappable_p): Exclude
	UNSPEC_VBPERMQ.
gcc/testsuite/
	PR target/84033
	* gcc.target/powerpc/swaps-p8-46.c: New.

Backport svn r257070

Added:
    branches/gcc-6-branch/gcc/testsuite/gcc.target/powerpc/swaps-p8-46.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/config/rs6000/rs6000.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog