[PATCH 0/9] S/390 rework shift count handling - v3

[Andreas Krebbel]

here is an updated version of the shift count rework in the S/390
backend.

Bootstrapped and regtested on s390 and s390x --with-arch=z196,zEC12,z13

Changes:

- Merge the address reg and immediate alternatives as suggested in:
  https://gcc.gnu.org/ml/gcc-patches/2016-02/msg01744.html

- Add constraints (jm6 and jm8) equivalent to the
  const_int_6bitset_operand and const_int_8bitset_operand predicates.

Andreas Krebbel (9):
  gensupport: Fix define_subst operand renumbering.
  S/390: Use enabled attribute overrides to disable alternatives.
  S/390: Get rid of Y constraint in rotate patterns.
  S/390: Get rid of Y constraint in left and logical right shift
    patterns.
  S/390: Get rid of Y constraint in arithmetic right shift patterns.
  S/390: Get rid of Y constraint in tabort.
  S/390: Get rid of Y constraint in vector.md.
  S/390: Use define_subst for the setmem patterns.
  S/390: Disallow SImode in s390_decompose_address

 gcc/config/s390/constraints.md |   9 +
 gcc/config/s390/predicates.md  |  10 +
 gcc/config/s390/s390.c         |  31 ++-
 gcc/config/s390/s390.md        | 530 ++++++++++++++---------------------------
 gcc/config/s390/subst.md       | 147 ++++++++++++
 gcc/config/s390/vector.md      | 127 +++++-----
 gcc/gensupport.c               |  45 ++--
 7 files changed, 453 insertions(+), 446 deletions(-)
 create mode 100644 gcc/config/s390/subst.md

-- 
1.9.1