Benjamin Kramer f43438b6c3 X86: Emit test instead of constant shift + compare if the shift result is unused.
This allows us to compile
  return (mask & 0x8 ? a : b);
into
  testb $8, %dil
  cmovnel %edx, %esi
instead of
  andl  $8, %edi
  shrl  $3, %edi
  cmovnel %edx, %esi

which we formed previously because dag combiner canonicalizes setcc of and into shift.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207088 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-24 08:15:31 +00:00
..
2014-04-23 11:16:03 +00:00
2014-04-22 17:47:03 +00:00
2014-04-24 06:03:01 +00:00