9bb0eedb59
We can perform CSE on recipes that do not directly map to Instruction opcodes. One example is VPVectorPointerRecipe. Currently this is handled by supporting them in ::canHandle, but currently that means that we return std::nullopt from getOpcodeOrIntrinsicID() for it. This currently only works, because the only case we return std::nullopt and perform CSE is VPVectorPointerRecipe. But that does not work if we support more such recipes, like VPPredInstPHIRecipe (https://github.com/llvm/llvm-project/pull/162110). To fix this, return a custom opcode from getOpcodeOrIntrinsicID for recipes like VPVectorPointerRecipe, using the VPDefID after all regular instruction opcodes. PR: https://github.com/llvm/llvm-project/pull/162267