| commit | d138a7bb3f49cc92d0ab81ac68c63284adce2fbf | [log] [tgz] |
|---|---|---|
| author | Hal Finkel <hfinkel@anl.gov> | Sun Jan 04 12:35:03 2015 +0000 |
| committer | Hal Finkel <hfinkel@anl.gov> | Sun Jan 04 12:35:03 2015 +0000 |
| tree | 9bb3df24920e8493ef1e6664b3284d745983a982 | |
| parent | 5a9cd4d44e4bd15f835aec280ea158d2c7c5a920 [diff] |
[PowerPC] Materialize i64 constants using bit inversion Materializing full 64-bit constants on PPC64 can be expensive, requiring up to 5 instructions depending on the locations of the non-zero bits. Sometimes materializing the bit-reversed constant, and then flipping the bits, requires fewer instructions than the direct method. If so, do that instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225132 91177308-0d34-0410-b5e6-96231b3b80d8