| commit | 63b29821f9dc8a908ba3bdee27686c71d7343bad | [log] [tgz] |
|---|---|---|
| author | Sanjay Patel <spatel@rotateright.com> | Sat Dec 12 00:33:36 2015 +0000 |
| committer | Sanjay Patel <spatel@rotateright.com> | Sat Dec 12 00:33:36 2015 +0000 |
| tree | dcdbd976fce5037b207326db393799c4c0518995 | |
| parent | 8f2bcca5c759d0c46f86b852aa1747768e954d38 [diff] |
[InstCombine] allow any pair of bitcasts to be combined This change is discussed in D15392 and should allow us to effectively revert: http://llvm.org/viewvc/llvm-project?view=revision&revision=255261 if we canonicalize bitcasts ahead of extracts. It should be safe to convert any pair of bitcasts into a single bitcast, however, it was mentioned here: http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20110829/127089.html that we're not allowed to bitcast from an x86_mmx to some other types, but I'm not seeing any failures from that, and we have regression tests in CodeGen/X86 that appear to cover all of those cases. Some day we'll get to remove that MMX wart from LLVM IR completely? Differential Revision: http://reviews.llvm.org/D15468 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@255399 91177308-0d34-0410-b5e6-96231b3b80d8