[all-commits] [llvm/llvm-project] 5248e1: [AArch64] Fix frame-pointer offset with hazard pad...

[Benjamin Maxwell via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5248e1d4e1ee950d1703ec57141257b02446dd67
      https://github.com/llvm/llvm-project/commit/5248e1d4e1ee950d1703ec57141257b02446dd67
  Author: Benjamin Maxwell <benjamin.maxwell at arm.com>
  Date:   2024-12-02 (Mon, 02 Dec 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
    A llvm/test/CodeGen/AArch64/stack-hazard-windows.ll
    M llvm/test/CodeGen/AArch64/stack-hazard.ll

  Log Message:
  -----------
  [AArch64] Fix frame-pointer offset with hazard padding (#118091)

The `-aarch64-stack-hazard-size=<val>` option disables register paring
(as the hazard padding may mean the offset is too large for STP/LDP).

This broke setting the frame-pointer offset, as the code to find the
frame record looked for a (FP, LR) register pair.

This patch resolves this by looking for FP, LR as two unpaired registers
when hazard padding is enabled.



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