llvm-svn: 34751

llvm-svn: 34750

llvm-svn: 34741

llvm-svn: 34740

llvm-svn: 34738

llvm-svn: 34736

llvm-svn: 34735

llvm-svn: 34711

llvm-svn: 34706

llvm-svn: 34700

llvm-svn: 34698

llvm-svn: 34691

llvm-svn: 34690

llvm-svn: 34656

llvm-svn: 34655

forward() should not increment internal iterator. Its client may insert instruction between now and next forward() call.

llvm-svn: 34649

llvm-svn: 34645

sextinreg if not needed.   This is useful in two cases: before legalize,
it avoids creating a sextinreg that will be trivially removed.  After legalize
if the target doesn't support sextinreg, the trunc/sext would not have been
removed before.

llvm-svn: 34621

llvm-svn: 34620

llvm-svn: 34610

llvm-svn: 34599

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