| commit | a0c9939873c404f272b3e0abb102c335146764fe | [log] [tgz] |
|---|---|---|
| author | Shuxin Yang <shuxin.llvm@gmail.com> | Thu Mar 14 18:08:26 2013 +0000 |
| committer | Shuxin Yang <shuxin.llvm@gmail.com> | Thu Mar 14 18:08:26 2013 +0000 |
| tree | 84f6e3312578dad30c29dacf3e2a37323695fa74 | |
| parent | d9e90b20e28c42bc35d0668cab5c07b44d28f0cc [diff] |
Perform factorization as a last resort of unsafe fadd/fsub simplification.
Rules include:
1)1 x*y +/- x*z => x*(y +/- z)
(the order of operands dosen't matter)
2) y/x +/- z/x => (y +/- z)/x
The transformation is disabled if the new add/sub expr "y +/- z" is a
denormal/naz/inifinity.
rdar://12911472
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177088 91177308-0d34-0410-b5e6-96231b3b80d8