[all-commits] [llvm/llvm-project] 02fad0: [RISCV][SDAG] Fold `select c, ~x, x` into `xor -c, ...

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 02fad0565fe7f061bdaa79ff33b29f64b2c290eb
      https://github.com/llvm/llvm-project/commit/02fad0565fe7f061bdaa79ff33b29f64b2c290eb
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2024-02-21 (Wed, 21 Feb 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/select.ll

  Log Message:
  -----------
  [RISCV][SDAG] Fold `select c, ~x, x` into `xor -c, x` (#82462)

This patch lowers select of constants if `TrueV == ~FalseV`.
Address the comment in
https://github.com/llvm/llvm-project/pull/82456#discussion_r1496881603.



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