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| author | Nikita Popov <nikita.ppv@gmail.com> | 2018-11-24 19:00:45 +0000 |
|---|---|---|
| committer | Nikita Popov <nikita.ppv@gmail.com> | 2018-11-24 19:00:45 +0000 |
| commit | 2c779c0e342b310ead9461d5eac0b58886241c75 (patch) | |
| tree | 5b5d26900984e7ba4633e3291d23e4c59420ab63 /compiler-rt/lib | |
| parent | 42720603c44a398b0ffeeecf8d15dc9adf808e17 (diff) | |
| download | bcm5719-llvm-2c779c0e342b310ead9461d5eac0b58886241c75.tar.gz bcm5719-llvm-2c779c0e342b310ead9461d5eac0b58886241c75.zip | |
[InstCombine] Determine demanded and known bits for funnel shifts
Support funnel shifts in InstCombine demanded bits simplification.
If the shift amount is constant, we can determine both the demanded
bits of the operands, as well as the known bits of the result.
If one of the operands has no demanded bits, it will be replaced
by undef and the funnel shift will be simplified into a simple shift
due to the simplifications added in D54778.
Differential Revision: https://reviews.llvm.org/D54869
llvm-svn: 347515
Diffstat (limited to 'compiler-rt/lib')
0 files changed, 0 insertions, 0 deletions
