A couple of more places where a register liveness has been extended and its last kill should be updated accordingly.

llvm-svn: 34597

llvm-svn: 34596

llvm-svn: 34595

llvm-svn: 34594

llvm-svn: 34593

test/CodeGen/X86/fp-stack-ret.ll into:

        movl 4(%esp), %eax
        fldl (%eax)
        ret

instead of:

        subl $12, %esp
        movl 16(%esp), %eax
        movsd (%eax), %xmm0
        movsd %xmm0, (%esp)
        fldl (%esp)
        addl $12, %esp
        ret

by eliminating a token factor that blocked a check.

llvm-svn: 34584

llvm-svn: 34567

llvm-svn: 34556

llvm-svn: 34555

llvm-svn: 34551

llvm-svn: 34536

llvm-svn: 34535

llvm-svn: 34534

llvm-svn: 34525

A spill kills the register being stored. But it is later being reused by spiller, its live range has to be extended.

llvm-svn: 34517

llvm-svn: 34516

llvm-svn: 34512

Initial check in of register scavenger. Its only current functionality is tracking live registers per MBB.

llvm-svn: 34511

llvm-svn: 34503

llvm-svn: 34502

llvm-svn: 34501

llvm-svn: 34500

llvm-svn: 34499

llvm-svn: 34497

llvm-svn: 34496

llvm-svn: 34494

llvm-svn: 34493

llvm-svn: 34492

llvm-svn: 34491

llvm-svn: 34481

llvm-svn: 34479

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llvm-svn: 34476

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llvm-svn: 34461

llvm-svn: 34460

llvm-svn: 34435

llvm-svn: 34428

Revert patches that caused the problem. Evan, please investigate and reapply
when you've discovered the problem.

llvm-svn: 34399