[PATCH] D158384: [LoongArch] Optimize stack realignment using BSTRINS instruction

[wanglei via Phabricator via llvm-commits]

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Prior to this change, stack realignment was achieved using the SRLI/SLLI
instructions in two steps. With this patch, stack realignment is
optimized using a single `BSTRINS` instruction.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D158384

Files:
  llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp
  llvm/test/CodeGen/LoongArch/stack-realignment-with-variable-sized-objects.ll
  llvm/test/CodeGen/LoongArch/stack-realignment.ll

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