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It seems llvm/lib/Target/X86/X86ISelLowering.cpp's LowerAVXCONCAT_VECTORS is relevant to efficient lowering of `shufflevector %x, freeze(poison), mask`. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D103874/new/ https://reviews.llvm.org/D103874 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits