[llvm] [LV] Complete VPWidenCastRecipe cost model (PR #196918)

[Florian Hahn via llvm-commits]

fhahn wrote:

> When building for neoverse-v1, there are a total of 4 files in the whole LLVM test suite that hit the path where there is no underlying value:
> 
> SingleSource/Regression/C/gcc-c-torture/execute/mode-dependent-address.c: no change MultiSource/Benchmarks/mediabench/mpeg2/mpeg2dec/spatscal.c: no change MultiSource/Benchmarks/mediabench/jpeg/jpeg-6a/jdsample.c: no change MultiSource/Benchmarks/MiBench/consumer-jpeg/jdsample.c: no change
> 
> I think this PR is safe to land as it doesn't seem to have an adverse effect on real life workloads and fills in a hole in the vplan cost model.

Ok great, thanks for checking

https://github.com/llvm/llvm-project/pull/196918