llvm-project

b49a6b2a - [AArch64] Consider histcnt smaller than i32 in the cost model (#108521)

[AArch64] Consider histcnt smaller than i32 in the cost model (#108521) This PR updates the AArch64 cost model to consider the cheaper cost of <i32 histograms to reflect the improvements from https://github.com/llvm/llvm-project/pull/101017 and https://github.com/llvm/llvm-project/pull/103037 Work by Max Beck-Jones (@DevM-uk) --------- Co-authored-by: DevM-uk <max.beck-jones@arm.com>