[all-commits] [llvm/llvm-project] 0ade26: [DAG] visitBITCAST - fold (bitcast (freeze (load x...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0ade2604f2e135c5a8f081cb6a11cd2404aff38e
      https://github.com/llvm/llvm-project/commit/0ade2604f2e135c5a8f081cb6a11cd2404aff38e
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-11-07 (Fri, 07 Nov 2025)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/avx10_2_512bf16-arith.ll
    M llvm/test/CodeGen/X86/avx10_2bf16-arith.ll
    M llvm/test/CodeGen/X86/widen-load-of-small-alloca.ll

  Log Message:
  -----------
  [DAG] visitBITCAST - fold (bitcast (freeze (load x))) -> (freeze (load (bitcast*)x)) (#164618)

Tweak the existing (bitcast (load x)) -> (load (bitcast*)x) fold to handle oneuse freeze as well

Inspired by #163070 - this tries to avoid in place replacement of frozen nodes which has caused infinite loops in the past



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