[PATCH 0/4] Move pass-creation logic into a passes.def file

[David Malcolm <dmalcolm at redhat dot com>]

The following patch series moves the logic for creating the
pipeline of optimization passes out from passes.c and into a new
passes.def file (patches 1 and 2).

It then explicitly numbers those passes that have multiple instances, by
using a NEXT_PASS_NUM macro in place of NEXT_PASS (patch 3)

The motivation for this is subsequent work towards removing global
variables from GCC's internals: by numbering the instances it becomes
possible to create a "class pipeline" and have the fields be declared
via suitable use of passes.def.  See:
http://dmalcolm.fedorapeople.org/gcc/global-state/new-classes.html#pass-classes

The final patch in the sequence adds a script which sanity-checks
passes.def, and prints some stats about the passes.  You can see output
from the script at:

  http://dmalcolm.fedorapeople.org/gcc/2013-07-17/pass-stats.txt

Specifically, it lists single-instanced passes, then all multi-instance
passes, giving the number of instances of each (alphabetically within
each list).

I've successfully bootstrapped and tested the sequence of patches on
x86_64-unknown-linux-gnu: all testcases show the same results as an
unpatched build (relative to r201011).

OK to commit these to trunk?

David Malcolm (4):
  Introduce macros when constructing the tree of passes
  Move the construction of the pass hierarchy into a new passes.def
    file.
  Introduce NEXT_PASS_NUM macro
  Add contrib/check_passes.py script

 contrib/check_passes.py |  58 +++++++
 gcc/Makefile.in         |   2 +-
 gcc/passes.c            | 401 ++---------------------------------------------
 gcc/passes.def          | 406 ++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 481 insertions(+), 386 deletions(-)
 create mode 100644 contrib/check_passes.py
 create mode 100644 gcc/passes.def

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1.7.11.7