llvm-svn: 6890

llvm-svn: 6889

llvm-svn: 6888

want to mark it live if it is an unconditional branch.  This fixes bug:
ADCE/2002-05-28-Crash.ll and makes this pass _much_ more useful.

llvm-svn: 6887

llvm-svn: 6886

llvm-svn: 6885

llvm-svn: 6884

llvm-svn: 6883

llvm-svn: 6882

llvm-svn: 6881

llvm-svn: 6880

llvm-svn: 6879

llvm-svn: 6876

  Replace (cast (sub A, B) to bool) -> (setne A, B)
  Replace (cast (add A, B) to bool) -> (setne A, -B)

llvm-svn: 6873

llvm-svn: 6872

llvm-svn: 6871

llvm-svn: 6870

explicitly cast the result to be a byte, or C will gleefully promote it
to int.

llvm-svn: 6869

llvm-svn: 6868

llvm-svn: 6867

Remove isnan; it's too unportable to handle cleanly at this point.

llvm-svn: 6866

llvm-svn: 6865

llvm-svn: 6863

llvm-svn: 6862

llvm-svn: 6859

llvm-svn: 6858

llvm-svn: 6857

llvm-svn: 6856

llvm-svn: 6855

llvm-svn: 6854

llvm-svn: 6853

llvm-svn: 6852

Other minor reorganizations

llvm-svn: 6849

llvm-svn: 6847

llvm-svn: 6846

llvm-svn: 6844

llvm-svn: 6843

llvm-svn: 6842

llvm-svn: 6841

llvm-svn: 6840