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| author | Sam Elliott <selliott@lowrisc.org> | 2020-05-02 15:00:38 +0100 |
|---|---|---|
| committer | Sam Elliott <selliott@lowrisc.org> | 2020-05-02 15:01:04 +0100 |
| commit | a4a9a1f671ed79b648b41fca1a9c01b14cc1cbfc (patch) | |
| tree | 412601b6867922cfaec531f0a8b12038351598b5 /llvm/unittests/ADT/StringMapTest.cpp | |
| parent | 910ca0e435913be2c4cd8e7d9d12a0f4c759a215 (diff) | |
| download | llvm-a4a9a1f671ed79b648b41fca1a9c01b14cc1cbfc.zip llvm-a4a9a1f671ed79b648b41fca1a9c01b14cc1cbfc.tar.gz llvm-a4a9a1f671ed79b648b41fca1a9c01b14cc1cbfc.tar.bz2 | |
[RISCV] Add patterns for checking isnan
Summary:
This patch addresses some weird assembly sequences we were seeing during
comparing floats. In particular, comparing a float to itself tells you whether
it is NaN or not, which we were doing correctly, but with an extra unneeded
`and` instruction.
This patch specialises the existing patterns to remove the `and` instructions
when both their operands are the same.
Reviewed By: luismarques, asb
Differential Revision: https://reviews.llvm.org/D78908
Diffstat (limited to 'llvm/unittests/ADT/StringMapTest.cpp')
0 files changed, 0 insertions, 0 deletions