| author | Benjamin Kramer <benny.kra@googlemail.com> | |
| Fri, 26 Apr 2013 09:19:19 +0000 (09:19 +0000) | ||
| committer | Benjamin Kramer <benny.kra@googlemail.com> | |
| Fri, 26 Apr 2013 09:19:19 +0000 (09:19 +0000) | ||
| commit | 6242fda42ad13eebc908e744426ae7bc8cf8d1c3 | |
| tree | 71212f305027e461844fc0631056819517c0d0ea | tree | snapshot (tar.xz tar.gz zip) |
| parent | 7557e521e50180817a165f8c897220b0e2020b7b | commit | diff |
DAGCombiner: Canonicalize vector integer abs in the same way we do it for scalars.
This already helps SSE2 x86 a lot because it lacks an efficient way to
represent a vector select. The long term goal is to enable the backend to match
a canonicalized pattern into a single instruction (e.g. vabs or pabs).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180597 91177308-0d34-0410-b5e6-96231b3b80d8
This already helps SSE2 x86 a lot because it lacks an efficient way to
represent a vector select. The long term goal is to enable the backend to match
a canonicalized pattern into a single instruction (e.g. vabs or pabs).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180597 91177308-0d34-0410-b5e6-96231b3b80d8
| lib/CodeGen/SelectionDAG/DAGCombiner.cpp | diff | blob | history | |
| test/CodeGen/X86/viabs.ll | [new file with mode: 0644] | blob |