| commit | 32dfbeada7292167bb488f36a71a5a6a519ddaff | [log] [tgz] |
|---|---|---|
| author | Evan Cheng <evan.cheng@apple.com> | Fri Oct 12 08:50:34 2007 +0000 |
| committer | Evan Cheng <evan.cheng@apple.com> | Fri Oct 12 08:50:34 2007 +0000 |
| tree | 31e4a518a9a2e6d39858b20921f868948a28ec0b | |
| parent | 10136e7c7f599a559917e04f04e6dfbf025e451b [diff] |
EXTRACT_SUBREG coalescing support. The coalescer now treats EXTRACT_SUBREG like (almost) a register copy. However, it always coalesced to the register of the RHS (the super-register). All uses of the result of a EXTRACT_SUBREG are sub- register uses which adds subtle complications to load folding, spiller rewrite, etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42899 91177308-0d34-0410-b5e6-96231b3b80d8