Refactor code to support it

llvm-svn: 1083

llvm-svn: 1079

llvm-svn: 873

llvm-svn: 697

the BasicBlock class where they should be.  pred_begin/pred_end become methods on BasicBlock,
and the cfg namespace isn't used anymore.

llvm-svn: 691

  * Eliminate DoRemoveUnusedConstants

llvm-svn: 453

llvm-svn: 325

llvm-svn: 279

llvm-svn: 182

llvm-svn: 172

Operands are maintained as a vector<Use> in the User class, and operator
iterators are provided as before.  Getting an operand no longer requires
a virtual function call.

WARNING: getOperand(x) where x >= getNumOperands() will now assert instead
of returning null!

llvm-svn: 149

Optimizations now live in the 'opt' namespace
include/llvm/Opt was renamed include/llvm/Optimizations

llvm-svn: 113

* Avoid messing around with this case:
  br label %A
%A:  br label %A
* Enable optimizations that are correct now.

llvm-svn: 102

  * Convert post to pre-increment for for loops
  * Use generic programming more
  * Use new Value::cast* instructions
  * Use new Module, Method, & BasicBlock forwarding methods
  * Use new facilities in STLExtras.h
  * Use new Instruction::isPHINode() method

llvm-svn: 96

llvm-svn: 45

llvm-svn: 29

* Changes in PHI node structure

llvm-svn: 25

llvm-svn: 15

but at least the stuff that is checked in, now works.

llvm-svn: 10

llvm-svn: 2