[all-commits] [llvm/llvm-project] 4b7029: [LoongArch] Add a hook to sign extend i32 Constant...

[hev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4b702946006cfa9be9ab646ce5fc5b25248edd81
      https://github.com/llvm/llvm-project/commit/4b702946006cfa9be9ab646ce5fc5b25248edd81
  Author: hev <wangrui at loongson.cn>
  Date:   2024-06-06 (Thu, 06 Jun 2024)

  Changed paths:
    M llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
    M llvm/lib/Target/LoongArch/LoongArchISelLowering.h
    M llvm/test/CodeGen/LoongArch/sextw-removal.ll

  Log Message:
  -----------
  [LoongArch] Add a hook to sign extend i32 ConstantInt operands of phis on LA64 (#93813)

Materializing constants on LoongArch is simpler if the constant is sign
extended from i32. By default i32 constant operands of phis are zero
extended.
    
This patch adds a hook to allow LoongArch to override this for i32. We
have an existing isSExtCheaperThanZExt, but it operates on EVT which we
don't have at these places in the code.



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