[all-commits] [llvm/llvm-project] c3028a: [RISCV] Don't exlude the frame pointer from the ca...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c3028a230557405b0f10bdd7d450f7f92747bbe3
      https://github.com/llvm/llvm-project/commit/c3028a230557405b0f10bdd7d450f7f92747bbe3
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2024-05-13 (Mon, 13 May 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp
    M llvm/test/CodeGen/RISCV/local-stack-slot-allocation.ll

  Log Message:
  -----------
  [RISCV] Don't exlude the frame pointer from the callee saved registers in RISCVRegisterInfo::needsFrameBaseReg.

Instead of using getReservedRegs, just check the subtarget reserved
list. getReservedRegs considers the frame pointer to be reserved when
it is being used, but we do need to save/restore it so it should be
counted as a callee saved register. AArch64 hardcodes their callee
saved size, but the comment mentions the Frame Pointer being counted.



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