Also add functions to access pointer argument nodes cleanly.

llvm-svn: 4235

llvm-svn: 4234

llvm-svn: 4233

llvm-svn: 4232

llvm-svn: 4231

llvm-svn: 4230

used in the DS graphs in DSGraph.h.  With that, the special-purpose
class BUDataStructure::CallSite is no longer needed here.

llvm-svn: 4229

used in the DS graphs.  Essentially, what was vector<DSNodeHandle>
before is now a DSCallSite with the same vector, plus pointers to the
CallInst and the caller Function.  The special-purpose class
BUDataStructure::CallSite is no longer needed.

llvm-svn: 4228

in the DS graphs.

llvm-svn: 4227

llvm-svn: 4226

llvm-svn: 4225

llvm-svn: 4224

llvm-svn: 4223

llvm-svn: 4222

llvm-svn: 4221

 * BUClosure doesn't have to worry about global nodes
 * TDClosure now works with global nodes
 * Reenable DNE on TD pass, now that globals work right

llvm-svn: 4220

llvm-svn: 4219

llvm-svn: 4218

llvm-svn: 4217

llvm-svn: 4216

    among other things.
  * Significant rewrite of TD pass to avoid potentially N^2 algorithms if
    possible.  It is still not complete, but at least it's checked in now.

llvm-svn: 4215

llvm-svn: 4214

llvm-svn: 4213

  * Reenable the TD analysis

llvm-svn: 4212

 * Add a simple getNodeForValue method to access the ValueMap.

llvm-svn: 4211

the header

llvm-svn: 4210

favor of generic printer.

llvm-svn: 4209

llvm-svn: 4208

llvm-svn: 4207

llvm-svn: 4206

llvm-svn: 4205

llvm-svn: 4204

llvm-svn: 4203

llvm-svn: 4202

llvm-svn: 4201

llvm-svn: 4200

llvm-svn: 4199

llvm-svn: 4198

llvm-svn: 4197

llvm-svn: 4196