llvm-svn: 79664

This preserves the existing behavior much more closely than my previous attempt.

llvm-svn: 79663

llvm-svn: 79659

llvm-svn: 79657

llvm-svn: 79656

llvm-svn: 79652

llvm-svn: 79651

llvm-svn: 79649

llvm-svn: 79648

llvm-svn: 79643

  warning: comparison is always true due to limited range of data type.

llvm-svn: 79642

offset computations. This fixes a truncation bug on targets that
don't have 64-bit pointers.

llvm-svn: 79639

llvm-svn: 79638

llvm-svn: 79636

llvm-svn: 79635

llvm-svn: 79634

llvm-svn: 79633

leaf functions. This pass will be extended to color other nodes of the call tree 
as well in future.

llvm-svn: 79631

llvm-svn: 79629

llvm-svn: 79626

llvm-svn: 79625

llvm-svn: 79624

Add simple cost model to perfect shuffle. Currently we're doing just greedy search for cost instead of (proper) dynamic programming approach.

llvm-svn: 79623

llvm-svn: 79622

llvm-svn: 79621

llvm-svn: 79620

Use masks not nodes for vector shuffle predicates. Provide set of 'legal' masks, so legalizer won't infinite cycle

llvm-svn: 79619

llvm-svn: 79618

llvm-svn: 79617

llvm-svn: 79616

llvm-svn: 79615

llvm-svn: 79614

 - Together these form the (Mach-O) back end of the assembler.

 - MCAssembler is the actual assembler backend, which is designed to have a
   reasonable API. This will eventually grow to support multiple object file
   implementations, but for now its Mach-O/i386 only.

 - MCMachOStreamer adapts the MCStreamer "actions" API to the MCAssembler API,
   e.g. converting the various directives into fragments, managing state like
   the current section, and so on.

 - llvm-mc will use the new backend via '-filetype=obj', which may eventually
   be, but is not yet, since I hear that people like assemblers which actually
   assemble.

 - The only thing that works at the moment is changing sections. For the time
   being I have a Python Mach-O dumping tool in test/scripts so this stuff can
   be easily tested, eventually I expect to replace this with a real LLVM tool.

 - More doxyments to come.

I assume that since this stuff doesn't touch any of the things which are part of
2.6 that it is ok to put this in not so long before the freeze, but if someone
objects let me know, I can pull it.

llvm-svn: 79612

 - Add missing flags for various Objective-C sections.

 - Fix names for [non_]lazy_symbol_pointer (these are misspelled in the manual).

 - .symbol_stub does not have the self modifying code flag set (this appears to
   be wrong in the manual?).

 - Add implicit alignment values; not yet used.

Also, call MCStreamer::Finish at the end of a successful parse.

llvm-svn: 79611

llvm-svn: 79607

llvm-svn: 79604

llvm-svn: 79603

llvm-svn: 79602

llvm-svn: 79601

llvm-svn: 79598