llvm-project

ef89e3ef - [VPlan] Collect ephemeral values for VPlan.

[VPlan] Collect ephemeral values for VPlan. Port collectEphemeralValues to VPlan as collectEphemeralRecipesForVPlan, use it in willGenerateVectors. This fixes a regression caused by 29b8b72117 for loops where the only vector values are ephemeral.