[all-commits] [llvm/llvm-project] 36239f: [RISCV] Move AVL coalescing logic upwards into com...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 36239f9418d3ea19142e13d1bb05bd043ccf3d23
      https://github.com/llvm/llvm-project/commit/36239f9418d3ea19142e13d1bb05bd043ccf3d23
  Author: Luke Lau <luke at igalia.com>
  Date:   2023-12-01 (Fri, 01 Dec 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp

  Log Message:
  -----------
  [RISCV] Move AVL coalescing logic upwards into computeInfoForInstr. NFC (#73909)

There is an optimisation in transferBefore where if a VSETVLIInfo uses
the AVL
of a defining vsetvli, it uses that vsetvli's AVL provided VLMAX is the
same.

This patch moves it out of transferBefore and up into
computeInfoForInstr to
show how it isn't affected by the other optimisations in transferBefore,
and to
simplify the control flow by removing an early return.

This should make #72352 easier to reason about.