Supports GAS flags "abdnrswxy". No support for alignment or subsections.

Fixes PR16366.

llvm-svn: 185669

llvm-svn: 185668

This transform was originally added in r185257 but later removed in
r185415.  The original transform would create instructions speculatively
and then discard them if the speculation was proved incorrect.  This has
been replaced with a scheme that splits the transform into two parts:
preflight and fold.  While we preflight, we build up fold actions that
inform the folding stage on how to act.

llvm-svn: 185667

Removed extension in [unordered_][multi]map which allowed one to emplace using just an argument for the key, as opposed to using piecewise_construct.  However a bug report exposed that this created an unfortunate ambiguity.  People who are currently using the extension will be notified the next time they compile, and will have to change to using piecewise_construct.  There are no ABI issues with the removal of this extension.  This fixes http://llvm.org/bugs/show_bug.cgi?id=16542

llvm-svn: 185666

Simplify comparators of [unordered_][multi]map.  This fixes http://llvm.org/bugs/show_bug.cgi?id=16538

llvm-svn: 185665

llvm-svn: 185664

llvm-svn: 185663

[PowerPC] Implement writeNopData

This implements a proper PPCAsmBackend::writeNopData routine
that actually writes PowerPC nop instructions.

This fixes the last remaining difference in object file output
(text section) between the integrated assembler and GNU as
that I've seen anywhere.

llvm-svn: 185662

llvm-svn: 185661

* all transforms are in the same category
* all transforms' options are in the same category
* display the CommonOptionParser extra-help (which describe in more details the
  compilation database stuff)
* add EXAMPLES section

Author: Guillaume Papin <guillaume.papin@epitech.eu>
llvm-svn: 185660

llvm-svn: 185659

llvm-svn: 185658

llvm-svn: 185657

llvm-svn: 185656

llvm-svn: 185655

llvm-svn: 185654

Some versions of python will expand the glob used in the test, others wont,
causing the test to fail when run with LIT_USE_INTERNAL_SHELL=1.

llvm-svn: 185653

This is at least good documentation, but also opens the possibility of
using pipefail.

llvm-svn: 185652

llvm-svn: 185651

llvm-svn: 185650

llvm-svn: 185649

This avoids depending on pipefail not being used.

llvm-svn: 185648

llvm-svn: 185647

llvm-svn: 185646

llvm-svn: 185645

llvm-svn: 185644

llvm-svn: 185643

This adds a new decoder table/namespace 'VFPV8', as these instructions have their
top 4 bits as 0b1111, while other Thumb instructions have 0b1110.

llvm-svn: 185642

llvm-svn: 185641

llvm-svn: 185640

llvm-svn: 185639

[PowerPC] Add all trap mnemonics

This adds support for all basic and extended variants
of the trap instructions to the asm parser.

llvm-svn: 185638

llvm-svn: 185637

llvm-svn: 185636

llvm-svn: 185635

The test was passing because clang would still print the ast before exiting
with an error. Since that didn't seem to be the intent of the test, I change
the test instead of adding 'not' to the command line.

llvm-svn: 185634

[PowerPC] Add asm parser support for CR expressions

This adds support for specifying condition registers and
condition register fields via expressions using the symbols
defined by the PowerISA, like "4*cr2+eq".

llvm-svn: 185633

This allows us to create switches even if instcombine has munged two of the
incombing compares into one and some bit twiddling. This was motivated by enum
compares that are common in clang.

llvm-svn: 185632

llvm-svn: 185631

It was trivially passing because of the tcl quotes and we have better datalayout
tests.

llvm-svn: 185630