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      1 // RUN: %clang_cc1 %s -gline-tables-only -S -emit-llvm -o - | FileCheck %s
      2 // Checks that clang with "-gline-tables-only" emits metadata for
      3 // compile unit, subprogram and file.
      4 
      5 int main() {
      6   // CHECK: ret i32 0, !dbg
      7   return 0;
      8 }
      9 
     10 // CHECK: !llvm.dbg.cu = !{!0}
     11 // CHECK: !MDCompileUnit(
     12 // CHECK: !MDSubprogram(
     13 // CHECK: !MDFile(
     14