https://github.com/fhahn created https://github.com/llvm/llvm-project/pull/74761
This patch starts initial modeling of runtime VF * UF in VPlan. Initially, introduce a dedicated RuntimeVFxUF VPValue, which is then populated during VPlan::prepareToExecute. Initially, the runtime VF * UF applies only to the main vector loop region. Once we extend the scope of VPlan in the future, we may want to associate different VFxUFs with different vector loop regions (e.g. the epilogue vector loop) This allows explicitly parameterizing recipes that rely on the runtime VF * UF, like the canonical induction increment. At the moment, this mainly helps to avoid generating some duplicated calls to vscale with scalable vectors. It should also allow using EVL as induction increments explicitly in D99750. Referring to VF * UF is also needed in other places that we plan to migrate to VPlan, like the minimum trip count check during skeleton creation. The first version creates the value for VF * UF directly in prepareToExecute to limit the scope of the patch. A follow-on patch will model VF * UF computation explicitly in VPlan using recipes. Moved from Phabricator (https://reviews.llvm.org/D157322) _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
