Addresses issue #126809
- Made `uadd_with_overflow`, `sadd_with_overflow`, `usub_with_overflow`,
`ssub_with_overflow`, `umul_with_overflow`, and `smul_with_overflow`
trivially scalarizable in `isTriviallyScalarizable()` from
`VectorUtils.cpp`
- Renamed and updated the test `Scalarizer/uadd_overflow.ll` to
`Scalarizer/uadd_with_overflow.ll` to check that `uadd_with_overflow`
gets scalarized
- Added a test `Scalarizer/sincos.ll` to ensure the bug fix#113625
still works
37ed2e6b33