[llvm] [VPlan] Manage noalias/alias_scope metadata in VPlan. (NFC) (PR #136450)

[Florian Hahn via llvm-commits]

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@@ -2459,7 +2465,7 @@ class VPReductionEVLRecipe : public VPReductionRecipe {
 /// copies of the original scalar type, one per lane, instead of producing a
 /// single copy of widened type for all lanes. If the instruction is known to be
 /// uniform only one copy, per lane zero, will be generated.
-class VPReplicateRecipe : public VPRecipeWithIRFlags {
+class VPReplicateRecipe : public VPRecipeWithIRFlags, public VPIRMetadata {
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fhahn wrote:

It would be good to break up the recipes, to remove the reliance on the underlying IR instruction. Other case to split off would probably be calls, but probably best done separately, as this will require quite a bit of work (currently it is all based on cloning the existing IR instruction).

VPReplicateRecipes other than loads should also have metadata; currently they use all metadata from the original instruction (due to cloning); this may be incorrect, as only certain IR metadata should be preserved (like widen-recipes, which only preserve a subset of the original metadata), again probably best to fix separately.



https://github.com/llvm/llvm-project/pull/136450