Subzero: Refine the memory usage report with -szstats .

Subzero: Refine the memory usage report with -szstats .

The problem is that the memory usage that comes from the -track-memory option is not very well-defined (it's a hidden LLVM option after all).  It gives an OK sense of memory growth over time, but sometimes we really want to know how much CFG-local arena memory was allocated for a particular function.

To help with this, we add another row to the stats output, giving the MB size of the CFG arena at the end of translating the method.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4366
R=kschimpf@google.com

Committed: https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a=commit;h=b5eee3d7bc9dfb37535e414051d177af1a517bfc

[Jim Stichnoth, 2016-03-31 17:38:00]

Description was changed from

==========
Subzero: Refine the memory usage report with -szstats .

BUG=
==========

to

==========
Subzero: Refine the memory usage report with -szstats .

The problem is that the memory usage that comes from the -track-memory option is
not very well-defined (it's a hidden LLVM option after all).  It gives an OK
sense of memory growth over time, but sometimes we really want to know how much
CFG-local arena memory was allocated for a particular function.

To help with this, we add another row to the stats output, giving the MB size of
the CFG arena at the end of translating the method.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4366
==========

[Jim Stichnoth, 2016-03-31 17:56:25]

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

[Karl, 2016-03-31 18:04:06]

lgtm

[Jim Stichnoth, 2016-03-31 18:05:41]

Description was changed from

==========
Subzero: Refine the memory usage report with -szstats .

The problem is that the memory usage that comes from the -track-memory option is
not very well-defined (it's a hidden LLVM option after all).  It gives an OK
sense of memory growth over time, but sometimes we really want to know how much
CFG-local arena memory was allocated for a particular function.

To help with this, we add another row to the stats output, giving the MB size of
the CFG arena at the end of translating the method.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4366
==========

to

==========
Subzero: Refine the memory usage report with -szstats .

The problem is that the memory usage that comes from the -track-memory option is
not very well-defined (it's a hidden LLVM option after all).  It gives an OK
sense of memory growth over time, but sometimes we really want to know how much
CFG-local arena memory was allocated for a particular function.

To help with this, we add another row to the stats output, giving the MB size of
the CFG arena at the end of translating the method.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4366
R=kschimpf@google.com

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

[Jim Stichnoth, 2016-03-31 18:05:43]

Committed patchset #4 (id:60001) manually as
b5eee3d7bc9dfb37535e414051d177af1a517bfc (presubmit successful).