This is an attempt to make IceBuildDefs more understandable
in the Doxygen produced output, as well as when the various
functions are later referenced from other parts of the subzero docs.

If you look at the doxygen for both the file and the IceBuildDefs namespace, I think it's definitely much
clearer.

I'm still learning Doxygen and always see new things and more that I could have done but Rome was not built in a day.

In my browser:
file:///home/rkotler/nacl_dir/native_client/toolchain_build/src/subzero/docs/html/namespaceIce_1_1BuildDefs.html

and

file:///home/rkotler/nacl_dir/native_client/toolchain_build/src/subzero/docs/html/IceBuildDefs_8h.html

BUG=
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1519113003 .

Patch from Reed Kotler <rkotlerimgtec@gmail.com>.

auto *Foo = llvm::cast<Foo>(...)
auto *Foo = llvm::dyn_cast<Foo>(...)
auto *Foo = llvm::dyn_cast_or_null<Foo>(...)
auto *Foo = Foo::create(...)

Some instances may have been missed due to line breaks or "const" mismatches.

BUG= none
R=kschimpf@google.com

Review URL: https://codereview.chromium.org/1516753008 .

BUG=
R=kschimpf@google.com, stichnot@chromium.org

Review URL: https://codereview.chromium.org/1514193003 .

Patch from Reed Kotler <rkotlerimgtec@gmail.com>.

Adds the data-processing "register-shifted register" form, as
well as the 5-bit immediate shift for mov instructions (which
unfortunately represent this form differently than other instructions).

This CL fixes the ARM integrated assembler to handle all non-V
(i.e. neon) instructions used by the spec2k test suite except:

   rsc: 59 instances.
   rev: 14 instances.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=jpp@chromium.org, stichnot@chromium.org

Review URL: https://codereview.chromium.org/1516063002 .

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=jpp@chromium.org, stichnot@chromium.org

Review URL: https://codereview.chromium.org/1517863002 .

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=jpp@chromium.org, stichnot@chromium.org

Review URL: https://codereview.chromium.org/1516103003 .

the comments now for the main program describe it very well
and the classes and methods in the comments are clickable.

BUG=
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1511483005 .

Patch from Reed Kotler <rkotlerimgtec@gmail.com>.

Defining this argument as "required=False, default=None" means it's not really optional.  It's possible to provide a reasonable default like in e.g. szbuild.py.

BUG= none
R=jpp@chromium.org

Review URL: https://codereview.chromium.org/1511963002 .

Note: There are no updates to the Dart source files, because Dart
doesn't implement this instruction (data memory barrier).

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1507873004 .

After some time of being neglected, this CL improves FP lowering for
ARM32.

1) It emits vpush {list}, and vpop {list} when possible.

2) It stops saving alised Vfp registers multiple times (yes, sz used to
save both D and S registers even when they aliased.)

3) Introduces Vmla (fp multiply and accumulate) and Vmls (multiply and
subtract.)

(1 + 2) minimally (but positively) affected SPEC.

(3) caused a 2% geomean improvement.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4076
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1481133002 .

The previous filter was too aggressive at changing "//" to "///".  The new filter does that transformation more selectively, starting at a commented TODO line and ending at the next non-commented line.

BUG= none

Review URL: https://codereview.chromium.org/1510893004 .

Fixes (at least) the obvious problems with sandboxing and the
integrated assembler. This includes:

Added assembly instruction Nop.

Fixed implementation of padWithNop.

Fixed linking to local label to only fire when persistent (i.e.  last
pass of assembly generation).

Removed restriction on single register push/pop, since the ARM
integrated assembler converts it to a corresopnding str/ldr.

Fixed OperandARM32FlexImm to use smallest rotation value, so that
external assemblers and the ARM integrated assembler will agree on
encoding.

Fixed ARM sandboxing requires test in sandboxing.ll

BUG=None
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1511653002 .

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1513543002 .

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1509243002 .

Refactors code to take advantage of these instructions with
Uxtb/Uxth.

Note. These instructions are used by Subzero, but not Dart.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1503273002 .

seems like these two lines are common to both paths and in fact
the different classes allocated are derived from the same common
base class so this makes sense to me.

BUG=
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1494753003 .

Patch from Reed Kotler <rkotlerimgtec@gmail.com>.

Also factors out the body of method lsl() to emitShift(), so
that all forms of shift instructions can use the same code.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1501073002 .

Uses a nasty regexp to turn something like:

  // ... TODO(stichnot): Fix
  // this.

into:

  /// ... @todo TODO(stichnot): Fix
  /// this.

so that doxygen can generate the TODO list.

Matches "TODO:" and "TODO " and "TODO(...".

BUG= none
R=rkotlerimgtec@gmail.com

Review URL: https://codereview.chromium.org/1489413007 .

(See https://codereview.chromium.org/1491473002/ for the steps taken
while implementing sandboxing.)

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4076
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1499983002 .

Adds RSB (immediate) and RSB (register) to the ARM integrated assembler.

Also moves udiv method to corresponding (sorted) position in cpp file.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1494433005 .

Add allowing movt to work on integer constants that aren't relocatable.

Also clean up code sharing between movw and movt.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1500073002 .

Once again, the configuration file that comes with Doxygen
seems to have defaults set for those generating API
Documentation and not for documenting the code in a whole
project.

With this turned off, even todos and such are ignored in
an anonymous namespace.

BUG=
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1501503002 .

Up to now, all error handling in the ARM integrated assembler was
handled by forcing a text fixup. This CL tries to minimize the use of
fixup's to only be applied when there is an unimplemented form of an
instruction. All other cases now generate fatal error messages.

This CL should make it easier to determine what instructions still need
to be extended.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1495093002 .

This reverts commit 38ac6bee (mistakenly
TBRed.)

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4076

Review URL: https://codereview.chromium.org/1499973002 .

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4076

Review URL: https://codereview.chromium.org/1491473002 .

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4076
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1477873002 .

There is a consistent mistake in most of the file level subzero doxygen
comments which stems from a problem with brief.

Basically, there are two types of documentation in Doxygen, inline and
structural documentation. File level documentation is always structural
because inline documentation must either come before or after the entity
and for a file that would be impossible.

When you have structure documentation, the brief and detailed is
handled differently and you have to explicity put the \brief qualifier in.

We were only doing this for a few files so when you looked the doxygen
for the source directory, the description was blank for almost all of them.
If you build docs with this patch and look at the "files" and src
directory, you will see all the brief descriptions now.

In addition I deleted the text "This file ..." from the
beginning of all the file desriptions because it's redundant when you look at the doxygen output and adds
no information but takes up space in the descripton.
BUG=
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1488913002 .

Cleans up function names containing "decode" and "encode". Change
"encode" to represent the conversion of values into bit-sequences, as
they appear in instructions. Change "decode" to represent the extraction
of values from bit sequences.

BUG=None
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1490383002 .

Adds many more cases of ldr{b,h}/str{b,h} instructions to the ARM
integerated assembler.

Also refactored decodeAddress() to deal with the fact that
immediate/register arguments for LDR/LDRB/STR/STRB differ for
LDRH/LDRD/STRH/STRD, by passing in the layout wanted.

Note: LDRD/STRD instructions are currently not used by Subzero.

BUG=https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1486263002 .

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4076
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1474883002 .

Moves APInt and corresponding convert to float method into the pnacl
translator. Renames APInt to BitcodeInt to be more clear that we aren't referring to LLVM's APInt. Rather, it is the representation in PNaCl bitcode.

BUG=None
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1484003003 .

Fixes nits found in landed CL's
https://codereview.chromium.org/1456783003,
https://codereview.chromium.org/1452293003, and
https://codereview.chromium.org/1460523005

BUG=None
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1484023002 .

BUG= none
R=sehr@chromium.org

Review URL: https://codereview.chromium.org/1479873002 .

1) Move helper creation to separate method, which also computes the maximum outgoing argument size.  The computed size is checked against call lowering's size.
2) Make addProlog use the outgoing argument size and remove the adjustments in lowerCall.
3) Remove AdjustStack instructions and friends.

BUG=
R=jpp@chromium.org, stichnot@chromium.org

Review URL: https://codereview.chromium.org/1472623002 .

This makes it easier to do bisection debugging.

Note that this could be used to simplify "make -f Makefile.standalone check-spec", but I chose not to do that because shellcmd() buffers all of the stdout until completion, which is not a great user experience (at least for this user).

BUG= none
R=sehr@chromium.org

Review URL: https://codereview.chromium.org/1472833006 .

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4076
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1469113003 .

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4076
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1465213002 .

This way, the g++ build for the "make presubmit" target gets a separate build directory, and gets to use ccache.

Also, get rid of the "git diff" test, because uncommitted changes are already checked by "git cl upload" and "git cl land".

BUG= none
R=jpp@chromium.org

Review URL: https://codereview.chromium.org/1468823002 .

BUG=
R=jpp@chromium.org

Review URL: https://codereview.chromium.org/1458713002 .

Extends the ARM integrated assembler to understand register-shifted
data processing instructions (add, sub, etc.), as well as cmp/test
instructions.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=jpp@chromium.org

Review URL: https://codereview.chromium.org/1459673003 .