[all-commits] [llvm/llvm-project] f2f584: [WebAssembly][FastISel] Fold AND mask operations i...

[hanbeom via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f2f5845f195aa5bb25d28702daadc628cfdeabea
      https://github.com/llvm/llvm-project/commit/f2f5845f195aa5bb25d28702daadc628cfdeabea
  Author: hanbeom <kese111 at gmail.com>
  Date:   2026-03-11 (Wed, 11 Mar 2026)

  Changed paths:
    M llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
    M llvm/test/CodeGen/WebAssembly/load-ext.ll
    M llvm/test/CodeGen/WebAssembly/offset-fastisel.ll

  Log Message:
  -----------
  [WebAssembly][FastISel] Fold AND mask operations into ZExt load (#183743)

FastISel emits separate load and AND instructions for bitmasking.
(before) %1:i32 = LOAD_I32 %addr; %2:i32 = AND_I32 %1, 255

Fold AND masks into ZExt loads by verifying operands with
maskTrailingOnes. A getFoldedLoadOpcode wrapper is implemented
to manage dispatching logic for better extensibility.
(after) %1:i32 = LOAD8_U_I32 %addr

Fixed: https://github.com/llvm/llvm-project/issues/180783



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