r254596 - in /trunk/gcc: ChangeLog doc/sourcebu...

[rsandifo@gcc.gnu.org]

Author: rsandifo
Date: Thu Nov  9 15:18:59 2017
New Revision: 254596

URL: https://gcc.gnu.org/viewcvs?rev=254596&root=gcc&view=rev
Log:
Add a vect_align_stack_vars target selector

This patch adds a target selector to say whether it's possible to
align a local variable to the target's preferred vector alignment.
This can be false for large vectors if the alignment is only
a preference and not a hard requirement (and thus if there is no
need to support a stack realignment mechanism).

2017-11-09  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* doc/sourcebuild.texi (vect_align_stack_vars): Document.

gcc/testsuite/
	* lib/target-supports.exp
	(check_effective_target_vect_align_stack_vars): New proc.
	* gcc.dg/vect/vect-23.c: Only expect the array to be aligned if
	vect_align_stack_vars.
	* gcc.dg/vect/vect-24.c: Likewise.
	* gcc.dg/vect/vect-25.c: Likewise.
	* gcc.dg/vect/vect-26.c: Likewise.
	* gcc.dg/vect/vect-32-big-array.c: Likewise.
	* gcc.dg/vect/vect-32.c: Likewise.
	* gcc.dg/vect/vect-40.c: Likewise.
	* gcc.dg/vect/vect-42.c: Likewise.
	* gcc.dg/vect/vect-46.c: Likewise.
	* gcc.dg/vect/vect-48.c: Likewise.
	* gcc.dg/vect/vect-52.c: Likewise.
	* gcc.dg/vect/vect-54.c: Likewise.
	* gcc.dg/vect/vect-62.c: Likewise.
	* gcc.dg/vect/vect-67.c: Likewise.
	* gcc.dg/vect/vect-75-big-array.c: Likewise.
	* gcc.dg/vect/vect-75.c: Likewise.
	* gcc.dg/vect/vect-77-alignchecks.c: Likewise.
	* gcc.dg/vect/vect-78-alignchecks.c: Likewise.
	* gcc.dg/vect/vect-89-big-array.c: Likewise.
	* gcc.dg/vect/vect-89.c: Likewise.
	* gcc.dg/vect/vect-96.c: Likewise.
	* gcc.dg/vect/vect-multitypes-3.c: Likewise.
	* gcc.dg/vect/vect-multitypes-6.c: Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/doc/sourcebuild.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/vect/vect-23.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-24.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-25.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-26.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-32-big-array.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-32.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-40.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-42.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-46.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-48.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-52.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-54.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-62.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-67.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-75-big-array.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-75.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-77-alignchecks.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-78-alignchecks.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-89-big-array.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-89.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-96.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-multitypes-3.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-multitypes-6.c
    trunk/gcc/testsuite/lib/target-supports.exp