Nikita Popov 46ee652c70 Revert "[InstSimplify] Remove known bits constant folding"
This reverts commit 08556afc54e7ddfa7cc2fdd69c615ad417722517.

This breaks some AMDGPU tests.
2020-05-03 20:45:10 +02:00
..
2020-05-01 10:06:56 -04:00