llvm-svn: 5200

* Use new FunctionFrameInfo object to manage stack slots instead of doing
  it directly
* Adjust to new MRegisterInfo API
* Don't take a TM as a ctor argument
* Don't keep track of which callee saved registers are modified
* Don't emit prolog/epilog code or spill/restore code for callee saved regs
* Use new allocation_order_begin/end iterators to simplify dramatically the
  logic for picking registers to allocate
* Machine PHI nodes can no longer contain constant arguments

llvm-svn: 5195

Only spill and reload caller saved registers that are actually modified.

llvm-svn: 5145

strtol to not miscompile, and fixing bug: 2002-12-23-LocalRAProblem.llx

llvm-svn: 5132

* Add a new option to eliminate spilling of registers that are only used
  within a basic block.

llvm-svn: 5106

llvm-svn: 5099

Move X86 specific alignment gunk to X86 files

llvm-svn: 5096

llvm-svn: 5093

* Implement register alias set support

llvm-svn: 5082

llvm-svn: 5078