Subzero: Remove unneeded ScratchRegs.

Subzero: Remove unneeded ScratchRegs.

These static members of the various TargetLowering classes are no longer used anywhere and can therefore be removed.

BUG= none
R=jpp@chromium.org

Committed: https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a=commit;h=29d15fd619f1d46f8e0c3d22932b9931c4b81367

[Jim Stichnoth, 2016-01-16 18:48:42]

Description was changed from

==========
Subzero: Remove unneeded ScratchRegs.

BUG= none
==========

to

==========
Subzero: Remove unneeded ScratchRegs.

These static members of the various TargetLowering classes are no longer used
anywhere and can therefore be removed.

BUG= none
==========

[Jim Stichnoth, 2016-01-16 18:48:42]

stichnot@chromium.org changed reviewers:
+ jpp@chromium.org, kschimpf@google.com, sehr@chromium.org

[John, 2016-01-19 15:14:40]

lgtm

Can the columns in the .def file(s) be removed as well?

[Jim Stichnoth, 2016-01-19 17:55:58]

On 2016/01/19 15:14:40, John wrote:
> Can the columns in the .def file(s) be removed as well?

Not really.  The "scratch" column is still accessed in the *Traits.h files.  In
particular, we use it to compute the set of registers killed by a call
instruction, and it also feeds into the equivalence class computation for
register randomization.

[Jim Stichnoth, 2016-01-19 18:25:40]

Description was changed from

==========
Subzero: Remove unneeded ScratchRegs.

These static members of the various TargetLowering classes are no longer used
anywhere and can therefore be removed.

BUG= none
==========

to

==========
Subzero: Remove unneeded ScratchRegs.

These static members of the various TargetLowering classes are no longer used
anywhere and can therefore be removed.

BUG= none
R=jpp@chromium.org

Committed:
https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a...
==========

[Jim Stichnoth, 2016-01-19 18:25:41]

Committed patchset #2 (id:20001) manually as
29d15fd619f1d46f8e0c3d22932b9931c4b81367 (presubmit successful).