search for: 9knbnp

Hello all again, take 2. Over in D68651 I would like to make code that attempt to saturate an value (using higher bitwidth integers) use a saturating intrinsic instead. Something like this: https://godbolt.org/z/9knBnP As can be seen, the unsigned cases are already being matched to llvm.uadd.sat intrinsics. I am hoping to extend that to the signed cases. This has numerous benefits including simpler vectorization, cost-modelling and matching in the backend. The current forms of the saturating intrinsics extend in...