Subzero: Add "szbuild.py --no-sz" arg for suppressing the pnacl-sz run.

Subzero: Add "szbuild.py --no-sz" arg for suppressing the pnacl-sz run.

This enables the following workflow:

1. Run "szbuild.py --filetype=asm ..." to generate a .s file.
2. Edit the .s file to mock up a Subzero change.
3. Run "szbuild.py --filetype=asm --no-sz ..." to restart the build post pnacl-sz.

This workflow is good for trying out localized changes to hot basic blocks, though it isn't really appropriate for global optimizations like register allocation.

BUG= none
R=kschimpf@google.com

Committed: https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a=commit;h=42356fb7a19e5fe9c42a90851dc76f0a7f795d31

[Jim Stichnoth, 2015-11-10 01:29:01]

Description was changed from

==========
Subzero: Add "szbuild.py --no-sz" arg for suppressing the pnacl-sz run.

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

to

==========
Subzero: Add "szbuild.py --no-sz" arg for suppressing the pnacl-sz run.

This enables the following workflow:

1. Run "szbuild.py --filetype=asm ..." to generate a .s file.
2. Edit the .s file to mock up a Subzero change.
3. Run "szbuild.py --filetype=asm --no-sz ..." to restart the build post
pnacl-sz.

This workflow is good for trying out localized changes to hot basic blocks,
though it isn't really appropriate for global optimizations like register
allocation.

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

[Jim Stichnoth, 2015-11-10 01:29:01]

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

[Karl, 2015-11-10 16:34:20]

lgtm

[Jim Stichnoth, 2015-11-10 16:41:18]

Committed patchset #1 (id:1) manually as
42356fb7a19e5fe9c42a90851dc76f0a7f795d31 (presubmit successful).