Thumb1 frame lowering: Mark CFI instructions with the FrameSetup flag.
Followup to r224294:
ARM/AArch64: Attach the FrameSetup MIFlag to CFI instructions.
Debug info marks the first instruction without the FrameSetup flag
as being the end of the function prologue. Any CFI instructions in the
middle of the function prologue would cause debug info to end the prologue
too early and worse, attach the line number of the CFI instruction, which
incidentally is often 0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224743
91177308-0d34-0410-b5e6-
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