r243069 - in /branches/ARM/sve-branch/gcc: conf...

[rsandifo at gcc dot gnu dot org]

Author: rsandifo
Date: Wed Nov 30 19:08:51 2016
New Revision: 243069

URL: https://gcc.gnu.org/viewcvs?rev=243069&root=gcc&view=rev
Log:
Allow capped vectorisation factors

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

This patch allows the controlling mask for a loop to be clamped to
a compile-time maximum.  We can then vectorise code that has a
known dependence distance, even if it is (or might be) smaller
than a vector.

This is almost ready for trunk, but I'd prefer to do some more
checking first.

Added:
    branches/ARM/sve-branch/gcc/testsuite/gcc.target/aarch64/sve_cap_1.c
    branches/ARM/sve-branch/gcc/testsuite/gcc.target/aarch64/sve_cap_1_run.c
    branches/ARM/sve-branch/gcc/testsuite/gcc.target/aarch64/sve_cap_2.c
    branches/ARM/sve-branch/gcc/testsuite/gcc.target/aarch64/sve_cap_2_run.c
    branches/ARM/sve-branch/gcc/testsuite/gcc.target/aarch64/sve_cap_3.c
    branches/ARM/sve-branch/gcc/testsuite/gcc.target/aarch64/sve_cap_3_run.c
Modified:
    branches/ARM/sve-branch/gcc/config/aarch64/aarch64-sve.md
    branches/ARM/sve-branch/gcc/config/aarch64/aarch64.md
    branches/ARM/sve-branch/gcc/internal-fn.def
    branches/ARM/sve-branch/gcc/optabs.def
    branches/ARM/sve-branch/gcc/testsuite/gcc.dg/vect/slp-28.c
    branches/ARM/sve-branch/gcc/tree-ssa-loop-ivopts.c
    branches/ARM/sve-branch/gcc/tree-vect-data-refs.c
    branches/ARM/sve-branch/gcc/tree-vect-loop-manip.c
    branches/ARM/sve-branch/gcc/tree-vect-loop.c
    branches/ARM/sve-branch/gcc/tree-vect-stmts.c
    branches/ARM/sve-branch/gcc/tree-vectorizer.h