[all-commits] [llvm/llvm-project] 5134bd: [DwarfEhPrepare] Assign dummy debug location for i...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5134bd432f8c35c87f4c4dc3bb744d396adcab58
      https://github.com/llvm/llvm-project/commit/5134bd432f8c35c87f4c4dc3bb744d396adcab58
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2022-09-01 (Thu, 01 Sep 2022)

  Changed paths:
    M llvm/lib/CodeGen/DwarfEHPrepare.cpp
    A llvm/test/CodeGen/X86/dwarf-eh-prepare-dbg.ll

  Log Message:
  -----------
  [DwarfEhPrepare] Assign dummy debug location for inserted _Unwind_Resume calls (PR57469)

DwarfEhPrepare inserts calls to _Unwind_Resume into landing pads.
If _Unwind_Resume happens to be defined in the same module and
debug info is used, then this leads to a verifier error:

  inlinable function call in a function with debug info must
    have a !dbg location
  call void @_Unwind_Resume(ptr %exn.obj) #0

Fix this by assigning a dummy location to the call. (As this
happens in the backend, inlining is not actually relevant here.)

Fixes https://github.com/llvm/llvm-project/issues/57469.

Differential Revision: https://reviews.llvm.org/D133095