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[WebAssembly] Optimizes [zext](and 63|32) for shl, srl and sra with selectShiftMask #170572

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[WebAssembly] Optimizes [zext](and 63|32) for shl, srl and sra with selectShiftMask #170572

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@badumbatish badumbatish commented Dec 3, 2025

selectShiftMask takes inspiration from RISCV's llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp.

@badumbatish badumbatish requested a review from lukel97 December 3, 2025 23:54
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