[all-commits] [llvm/llvm-project] 317efb: [AArch64] Fold CSET + BR_CC into a conditional bra...

[Benjamin Maxwell via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 317efbe4496900a60de09812aa91b1f486b2e795
      https://github.com/llvm/llvm-project/commit/317efbe4496900a60de09812aa91b1f486b2e795
  Author: Benjamin Maxwell <benjamin.maxwell at arm.com>
  Date:   2026-07-14 (Tue, 14 Jul 2026)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/branch-cond-split-fcmp.ll
    M llvm/test/CodeGen/AArch64/sve2p1-while-pn-folds.ll

  Log Message:
  -----------
  [AArch64] Fold CSET + BR_CC into a conditional branch (#207398)

Fold CSETs into conditional branches (rather than lowering to a CSET +
TB[N]Z). This is most useful for lowering loop conditions based on
predicate-as-counter whiles to:

```
whilelo pn8.s, x0, x1, vlx4
b.mi .Lloop
```



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