fixes bug: DSGraph/buglobals.ll

llvm-svn: 6947

read or written to.  Keep track of how many times this happens.  This should
be good for deleting things like references to type information in C++ classes

llvm-svn: 6946

llvm-svn: 6945

globals into constants if we can prove it's safe

llvm-svn: 6941

llvm-svn: 6903

llvm-svn: 6840

* Add new MultiObject flag to DSNode which keeps track of whether or not
  multiple objects have been merged into the node, allowing must-alias info
  to be tracked.

llvm-svn: 6794

BasicAA/featuretest.ll:constexpr_test

llvm-svn: 6740

llvm-svn: 6738

llvm-svn: 6696

Remove bogus assertion: a node with no referrers could be collapsed if field-sensitivity was disabled

llvm-svn: 6695

This implements: GCSE/2003-06-13-LoadStoreEliminate.ll

llvm-svn: 6694

Fixes bug: BasicAA/2003-06-01-AliasCrash.ll

llvm-svn: 6538

llvm-svn: 6495

llvm-svn: 6397

and related functions and flags.  Fixed several bugs where only
"isDef" was being checked, not "isDefAndUse".

llvm-svn: 6342

llvm-svn: 6270

llvm-svn: 6250

llvm-svn: 6249

llvm-svn: 6248

llvm-svn: 6230

llvm-svn: 5994

llvm-svn: 5959

llvm-svn: 5940

llvm-svn: 5871

llvm-svn: 5858

llvm-svn: 5795

llvm-svn: 5710

llvm-svn: 5695

llvm-svn: 5691

llvm-svn: 5684

llvm-svn: 5681

llvm-svn: 5671

llvm-svn: 5662

llvm-svn: 5661

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

llvm-svn: 5656

llvm-svn: 5650

information for various accesses.  What a concept.

llvm-svn: 5647

llvm-svn: 5645

llvm-svn: 5643