[all-commits] [llvm/llvm-project] dcdeee: [DAG] SimplifySetCC - adjust setcc result type whe...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dcdeeebef2ef008326211b661cfb81d1d35b4086
      https://github.com/llvm/llvm-project/commit/dcdeeebef2ef008326211b661cfb81d1d35b4086
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2026-09-25 (Fri, 25 Sep 2026)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/test/CodeGen/LoongArch/pr177863.ll
    A llvm/test/CodeGen/X86/vec_setcc-3.ll

  Log Message:
  -----------
  [DAG] SimplifySetCC - adjust setcc result type when peeking through truncates (#226422)

For the "(setcc (trunc x) (trunc y)) -> (setcc x y)" fold with non vXi1
cmp result type, make sure we adjust the type and then trunc/extend it
correctly using BooleanContent.

Fixes #226365



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