| commit | 3c9b5f394b1cb4008e782c807c094b872a760c29 | [log] [tgz] |
|---|---|---|
| author | Dan Gohman <gohman@apple.com> | Thu Sep 02 21:18:42 2010 +0000 |
| committer | Dan Gohman <gohman@apple.com> | Thu Sep 02 21:18:42 2010 +0000 |
| tree | ea498cabb8d700ced26f462c18e33871f642c8ec | |
| parent | 32e4c861c86e47d0d6da1631294c61117000c9bb [diff] |
Don't narrow the load and store in a load+twiddle+store sequence unless there are clearly no stores between the load and the store. This fixes this miscompile reported as PR7833. This breaks the test/CodeGen/X86/narrow_op-2.ll optimization, which is safe, but awkward to prove safe. Move it to X86's README.txt. llvm-svn: 112861