llvm-svn: 5657

There may be a single outside predecessor and
still need a new loop-preheader if the predecessor has multiple
successors.

llvm-svn: 5656

  * 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: 5654

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

llvm-svn: 5651

llvm-svn: 5650

  * New LoopInfo::isLoopHeader method
  * Remove some #if 0 code

llvm-svn: 5649

llvm-svn: 5648

information for various accesses.  What a concept.

llvm-svn: 5647

llvm-svn: 5646

llvm-svn: 5645

llvm-svn: 5644

llvm-svn: 5643

llvm-svn: 5642

llvm-svn: 5641

llvm-svn: 5640

llvm-svn: 5639

llvm-svn: 5638

llvm-svn: 5637

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

llvm-svn: 5636

llvm-svn: 5635

Add tracking for Mod/Ref info

llvm-svn: 5634

    * Takes into account the size of the memory reference to determine aliasing.
    * Expose mod/ref information in a more consistent way
    * BasicAA can now disambiguate A[i][1] and A[j][2] for conservative request
      sizes

llvm-svn: 5633

llvm-svn: 5632

  * Takes into account the size of the memory reference to determine aliasing.
  * Expose mod/ref information in a more consistent way

llvm-svn: 5631

llvm-svn: 5630

* Add a new initializePass() method to ImmutablePass

llvm-svn: 5629

llvm-svn: 5628

llvm-svn: 5627

llvm-svn: 5626

llvm-svn: 5625

llvm-svn: 5624

llvm-svn: 5623

llvm-svn: 5622

llvm-svn: 5621

llvm-svn: 5620

a union-find based algorithm, is significantly faster, and is more general.
It will also scale to handle call instructions correctly, which is a nice
added bonus.

This includes a new pass -print-alias-sets which can be used to show how
alias sets are formed for a particular analysis.

llvm-svn: 5619

llvm-svn: 5618