diff options
| author | Fiona Glaser <escha@apple.com> | 2015-07-10 18:29:02 +0000 |
|---|---|---|
| committer | Fiona Glaser <escha@apple.com> | 2015-07-10 18:29:02 +0000 |
| commit | b08ae7affb16f9f2efb8b9d77f2e581cb7d5b21f (patch) | |
| tree | ab19726fc1339db141cd4c3cd6e153a39cd8d88d /llvm/test/CodeGen/ARM/ldrd.ll | |
| parent | e4ba6b8c242823e7feafe3bca12173d56930254c (diff) | |
| download | bcm5719-llvm-b08ae7affb16f9f2efb8b9d77f2e581cb7d5b21f.tar.gz bcm5719-llvm-b08ae7affb16f9f2efb8b9d77f2e581cb7d5b21f.zip | |
ComputeKnownBits: be a bit smarter about ADDs
If our two inputs have known top-zero bit counts M and N, we trivially
know that the output cannot have any bits set in the top (min(M, N)-1)
bits, since nothing could carry past that point.
llvm-svn: 241927
Diffstat (limited to 'llvm/test/CodeGen/ARM/ldrd.ll')
0 files changed, 0 insertions, 0 deletions
