| commit | 952210e39439fae6eb5b9832a36253bd430fd1be | |
| author | Chris Lattner <sabre@nondot.org> | |
| Sun, 21 Nov 2010 00:28:59 +0000 (21 00:28 +0000) | ||
| committer | Chris Lattner <sabre@nondot.org> | |
| Sun, 21 Nov 2010 00:28:59 +0000 (21 00:28 +0000) | ||
| tree | 0368003df16ef9b625afc9cdca10357bf6f22268 | treesnapshot (tar.gz zip) |
| parent | bbb7839cd5f8dfc827a9175efe6e898cb522f6ff | commitdiff |
Implement PR8644: forwarding a memcpy value to a byval,
allowing the memcpy to be eliminated.
Unfortunately, the requirements on byval's without explicit
alignment are really weak and impossible to predict in the
mid-level optimizer, so this doesn't kick in much with current
frontends. The fix is to change clang to set alignment on all
byval arguments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119916 91177308-0d34-0410-b5e6-96231b3b80d8
allowing the memcpy to be eliminated.
Unfortunately, the requirements on byval's without explicit
alignment are really weak and impossible to predict in the
mid-level optimizer, so this doesn't kick in much with current
frontends. The fix is to change clang to set alignment on all
byval arguments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119916 91177308-0d34-0410-b5e6-96231b3b80d8