[PATCH] D135895: [RISCV] Limit alignment of stack temporary used for indirect passing of scalable vectors.

[Craig Topper via Phabricator via llvm-commits]

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Don't align it more than the stack alignment. If we do, we'll need
to use a frame pointer to align the stack in prologue/epilogue emission.

Creating a stack temporary for a scalable vector doesn't update the
max alignment in MachineFrameInfo, so we won't know we need to align
the stack in time to reserve the FP register from register allocation.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D135895

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/rvv/calling-conv-fastcc.ll
  llvm/test/CodeGen/RISCV/rvv/calling-conv.ll
  llvm/test/CodeGen/RISCV/rvv/rvv-args-by-mem.ll

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