[all-commits] [llvm/llvm-project] d6a7da: Reland [AArch64][DebugInfo] Do not recompute Calle...

[sdesmalen-arm via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: d6a7da80aae62474c15cad83d361830ffc4e2566
      https://github.com/llvm/llvm-project/commit/d6a7da80aae62474c15cad83d361830ffc4e2566
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2019-10-29 (Tue, 29 Oct 2019)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetFrameLowering.h
    M llvm/lib/CodeGen/LiveDebugValues.cpp
    M llvm/lib/CodeGen/RegUsageInfoCollector.cpp
    M llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp
    M llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
    M llvm/lib/Target/AArch64/AArch64MachineFunctionInfo.h
    M llvm/lib/Target/ARM/ARMFrameLowering.cpp
    M llvm/lib/Target/ARM/ARMFrameLowering.h
    A llvm/test/CodeGen/AArch64/wrong-callee-save-size-after-livedebugvariables.mir
    M llvm/test/DebugInfo/MIR/Mips/live-debug-values-reg-copy.mir
    M llvm/test/DebugInfo/MIR/X86/live-debug-values-reg-copy.mir

  Log Message:
  -----------
  Reland [AArch64][DebugInfo] Do not recompute CalleeSavedStackSize (Take 2)

llvm/test/DebugInfo/MIR/X86/live-debug-values-reg-copy.mir failed with
EXPENSIVE_CHECKS enabled, causing the patch to be reverted in
rG2c496bb5309c972d59b11f05aee4782ddc087e71.

This patch relands the patch with a proper fix to the
live-debug-values-reg-copy.mir tests, by ensuring the MIR encodes the
callee-saves correctly so that the CalleeSaved info is taken from MIR
directly, rather than letting it be recalculated by the PEI pass. I've
done this by running `llc -stop-before=prologepilog` on the LLVM
IR as captured in the test files, adding the extra MOV instructions
that were manually added in the original test file, then running `llc
-run-pass=prologepilog` and finally re-added the comments for the MOV
instructions.