* Remove bogus assertion: there may be a single outside predecessor and
    still need a new loop-preheader if the predecessor has multiple
    successors.  See bug: LICM/2003-02-27-PreheaderProblem.ll

llvm-svn: 5655

llvm-svn: 5653

   - Now we perform loop exit-block splitting to ensure exit blocks are
     always dominated by the loop header.
   - We now preserve dominance frontier information
   - This fixes bug: LICM/2003-02-26-LoopExitNotDominated.ll

llvm-svn: 5652

Convert to work with new AliasAnalysis interface by conservatively assuming all pointers are arbitrarily large accesses

llvm-svn: 5636

llvm-svn: 5620

llvm-svn: 5613

a pass which wraps the function.  This allows other passes to use the functionality

llvm-svn: 5610

llvm-svn: 5608

  * X*C + X --> X * (C+1)
  * X + X*C --> X * (C+1)
  * X - X*C --> X * (1-C)
  * X*C - X --> X * (C-1)

llvm-svn: 5592

  * A & ~A == 0
  * A / (2^c) == A >> c  if unsigned
  * 0 / A == 0
  * 1.0 * A == A
  * A * (2^c) == A << c
  * A ^ ~A == -1
  * A | ~A == -1
  * 0 % X = 0
  * A % (2^c) == A & (c-1) if unsigned
  * A - (A & B) == A & ~B
  * -1 - A == ~A

llvm-svn: 5587

llvm-svn: 5572

llvm-svn: 5567

llvm-svn: 5565

llvm-svn: 5562

llvm-svn: 5525

llvm-svn: 5522

llvm-svn: 5499

llvm-svn: 5472

This change provides a small (3%) but consistent speedup

llvm-svn: 5460

llvm-svn: 5458

llvm-svn: 5446

llvm-svn: 5443

* Fix bug: Linker/2003-01-30-LinkerTypeRename.ll

llvm-svn: 5441

llvm-svn: 5439

* remove using decls
 CVS: ----------------------------------------------------------------------

llvm-svn: 5437

llvm-svn: 5435

llvm-svn: 5432

llvm-svn: 5422

llvm-svn: 5407

llvm-svn: 5405

llvm-svn: 5281

llvm-svn: 5278

llvm-svn: 5277

Move graph.h into local directory

llvm-svn: 5276

llvm-svn: 5264

llvm-svn: 5235

Make sure to handle %'s in strings correctly so that the names of BB's and functions are actually printed!

llvm-svn: 5234

llvm-svn: 5222

rank map cache for instruction ranks

llvm-svn: 5030

  * Reword comment to make more clear
  * Don't print out BB's after modification made
  * Don't delete and new an instruction when we need to move something, just move it.

llvm-svn: 5029