[all-commits] [llvm/llvm-project] 327f1a: [AArch64] Ensure FPR128 callee-save stack offsets ...

[Benjamin Maxwell via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 327f1adef8df6afc07f6c88cfa380c97399af3dc
      https://github.com/llvm/llvm-project/commit/327f1adef8df6afc07f6c88cfa380c97399af3dc
  Author: Benjamin Maxwell <benjamin.maxwell at arm.com>
  Date:   2026-03-08 (Sun, 08 Mar 2026)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
    A llvm/test/CodeGen/AArch64/framelayout-fpr128-csr.ll
    A llvm/test/CodeGen/AArch64/framelayout-fpr128-spill.mir

  Log Message:
  -----------
  [AArch64] Ensure FPR128 callee-save stack offsets are aligned (#184314)

This was benign for Linux targets (as when dividing by the scale the
offset would be correctly truncated), so only resulted in failures with
`-DLLVM_ENABLE_ASSERTIONS=On`. On Windows, this was a miscompile as the
lack of alignment would result in the FPR128 callee-save getting
assigned to the same offset as the previous GPR.

Fixes: #183708



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