broke obsequi and a lot of other things.  It all boiled down to MBB being
overloaded in an inner scope and me confusing it with the one in the outer
scope.  Ugh!

llvm-svn: 13517

line by itself.

llvm-svn: 13516

llvm-svn: 13515

MBBs start out as #-1. When a MBB is added to a MachineFunction, it
gets the next available unique MBB number. If it is removed from a
MachineFunction, it goes back to being #-1.

llvm-svn: 13514

function-level unique numbering of MBBs.

llvm-svn: 13513

of MBBs.

Add non-const MachineBasicBlock::getParent() accessor method.

llvm-svn: 13512

llvm-svn: 13511

llvm-svn: 13510

llvm-svn: 13509

and consistent with the LLVM website.

llvm-svn: 13508

formatting.

llvm-svn: 13507

llvm-svn: 13506

llvm-svn: 13505

llvm-svn: 13504

llvm-svn: 13503

llvm-svn: 13502

llvm-svn: 13501

llvm-svn: 13500

llvm-svn: 13499

llvm-svn: 13498

llvm-svn: 13497

llvm-svn: 13496

  of the documentation)
* Do not make the link text be the link itself, use some keywords
* Make doc use stylesheets and HTML markup for lists instead of definitions
* Shorten page by not making multiple lines per link with description + link of
  the same name as the target

llvm-svn: 13495

        mov DWORD PTR [%ESP + 4], 1

instead of:

        mov %EAX, 1
        mov DWORD PTR [%ESP + 4], %EAX

llvm-svn: 13494

give the extracted function a more useful name than just foo_code.

llvm-svn: 13493

llvm-svn: 13491

instruction in them.

llvm-svn: 13490

PHI node entries from multiple outside-the-region blocks.  This also fixes
extraction of the entry block in a function.  Yaay.

This has successfully block extracted all (but one) block from the score_move
function in obsequi (out of 33).  Hrm, I wonder which block the bug is in.  :)

llvm-svn: 13489

* Add a stub for the severSplitPHINodes which will allow us to bbextract
  bb's with PHI nodes in them soon.
* Remove unused arguments from findInputsOutputs
* Dramatically simplify the code in findInputsOutputs.  In particular,
  nothing really cares whether or not a PHI node is using something.
* Move moveCodeToFunction to after emitCallAndSwitchStatement as that's the
  order they get called.
* Fix a bug where we would code extract a region that included a call to
  vastart.  Like 'alloca', calls to vastart must stay in the function that
  they are defined in.
* Add some comments.

llvm-svn: 13482

from the extracted region.  If the return has 0 or 1 exit blocks, the new
function returns void.  If it has 2 exits, it returns bool, otherwise it
returns a ushort as before.

This allows us to use a conditional branch instruction when there are two
exit blocks, as often happens during block extraction.

llvm-svn: 13481

  1. Get rid of the silly abort block.  When doing bb extraction, we get one
     abort block for every block extracted, which is kinda annoying.
  2. If the switch ends up having a single destination, turn it into an
     unconditional branch.

I would like to add support for conditional branches, but to do this we will
want to have the function return a bool instead of a ushort.

llvm-svn: 13478

llvm-svn: 13477

llvm-svn: 13476

can extract basic blocks up to the limit of the block extractor implementation.

llvm-svn: 13475

llvm-svn: 13472

two things: the FIXME in ExtractBlocks needs to be implemented, and the basic block
extractor itself needs to have enough bugs fixed for this to be more or less
useful.

Until the time that this is generally useful, it is hidden behind the new bugpoint
-enable-block-extraction option.  I hope to get the FIXME done tonight.

Also of note, this patch adds a -extract-bbs option to bugpoint which can be used
to debug the block extractor.  (hint hint Misha :)

llvm-svn: 13471

llvm-svn: 13470

llvm-svn: 13464

llvm-svn: 13462

llvm-svn: 13461