[all-commits] [llvm/llvm-project] d9391a: [mlir][llvm] Stop exporting empty debug MD strings

[Christian Ulmann via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d9391a37a9f8eb222a951606e0ca5d6a5b6b2199
      https://github.com/llvm/llvm-project/commit/d9391a37a9f8eb222a951606e0ca5d6a5b6b2199
  Author: Christian Ulmann <christian.ulmann at nextsilicon.com>
  Date:   2023-02-27 (Mon, 27 Feb 2023)

  Changed paths:
    M mlir/include/mlir/Dialect/LLVMIR/LLVMAttrDefs.td
    M mlir/lib/Target/LLVMIR/DebugImporter.cpp
    M mlir/lib/Target/LLVMIR/DebugImporter.h
    M mlir/lib/Target/LLVMIR/DebugTranslation.cpp
    M mlir/lib/Target/LLVMIR/DebugTranslation.h
    M mlir/test/Target/LLVMIR/Import/debug-info.ll
    M mlir/test/Target/LLVMIR/llvmir-debug.mlir

  Log Message:
  -----------
  [mlir][llvm] Stop exporting empty debug MD strings

This commit ensures that no empty debug metadata strings are exported as
these are not legal names. Additionally, this commit ensures that
non-existing strings are not accidentially imported as empty strings.

Reviewed By: gysit

Differential Revision: https://reviews.llvm.org/D144263