| commit | 97a29a5fee209769c52d78564ffe9dde514d5f03 | [log] [tgz] |
|---|---|---|
| author | Chris Lattner <sabre@nondot.org> | Fri Mar 13 05:22:11 2009 +0000 |
| committer | Chris Lattner <sabre@nondot.org> | Fri Mar 13 05:22:11 2009 +0000 |
| tree | faf14ba7ea8ee696b7a08aa3537cf772357e751c | |
| parent | 0582ae99ba75a556d6ff63b254da327d32ba036f [diff] |
optimize the case of cond ? 42 : 41 and friends. This compiles the
example to:
_test:
movl 4(%esp), %eax
cmpl $41, (%eax)
setg %al
movzbl %al, %eax
orl $4294967294, %eax
ret
instead of:
movl 4(%esp), %eax
cmpl $41, (%eax)
movl $4294967294, %ecx
movl $4294967295, %eax
cmova %ecx, %eax
ret
which is smaller in code size and faster. rdar://6668608
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66868 91177308-0d34-0410-b5e6-96231b3b80d8