r243070 - in /branches/ARM/sve-branch/gcc: conf...

[rsandifo@gcc.gnu.org]

Author: rsandifo
Date: Wed Nov 30 19:08:56 2016
New Revision: 243070

URL: https://gcc.gnu.org/viewcvs?rev=243070&root=gcc&view=rev
Log:
Add support for BRKA and LASTB

[Branch only patch -- not intended for trunk in its current state]

This patch uses BRKA and LASTB to optimise cases in which a value
produced by the final scalar iteration is live outside the loop.
Previously this situation would stop us from using a fully-masked
loop.

This patch lacks documentation but otherwise is almost ready
for trunk.

Added:
    branches/ARM/sve-branch/gcc/testsuite/gcc.target/aarch64/sve_live_1.c
    branches/ARM/sve-branch/gcc/testsuite/gcc.target/aarch64/sve_live_1_run.c
    branches/ARM/sve-branch/gcc/testsuite/gcc.target/aarch64/sve_live_2.c
    branches/ARM/sve-branch/gcc/testsuite/gcc.target/aarch64/sve_live_2_run.c
Modified:
    branches/ARM/sve-branch/gcc/config/aarch64/aarch64-sve.md
    branches/ARM/sve-branch/gcc/config/aarch64/iterators.md
    branches/ARM/sve-branch/gcc/internal-fn.def
    branches/ARM/sve-branch/gcc/optabs.def
    branches/ARM/sve-branch/gcc/tree-vect-loop.c