1  /* DWARF5 variant of inline2.
       2     Origin: PR debug/37801
       3  
       4    Abstract instances (DW_TAG_subroutines having the DW_AT_inline attribute)
       5    of second and first were having a DW_TAG_lexical_block DIE wrongly
       6    representing the inlined calls to third (in second) and to
       7    second (in first). At the same time, main didn't have children
       8    DW_TAG_inlined_subroutine DIEs representing the inlined calls to
       9    first, second and third.
      10  
      11    The ideal goal here is to test that we have no superfluous
      12    DW_TAG_lexical_block DIE anymore, that abstract instances DIEs have
      13    no descendant DIE with a DW_AT_abstract_origin attribute, and that main has
      14    properly nested DW_TAG_inlined_subroutine DIEs for third, second and first.
      15  */
      16  
      17  /* Explicitly use dwarf-5 which uses DW_FORM_implicit_const.  */
      18  /* { dg-do compile } */
      19  /* { dg-options "-O -g3 -gdwarf-5 -dA -fgnu89-inline" } */
      20  
      21  /* There are 6 inlined subroutines:
      22     - One for each subroutine inlined into main, that's 3.
      23     - One for earch subroutine inline into the out of line instances
      24       of third, second and first.  */
      25  /* { dg-final { scan-assembler-times "\\(DIE \\(\[^\n\]*\\) DW_TAG_inlined_subroutine" 6 } } */
      26  
      27  /* We should have no DW_TAG_lexical_block DIEs, all inline instances
      28     should have the first subblock elided to match the abstract instance
      29     layout.  */
      30  /* { dg-final { scan-assembler-times "\\(DIE \\(\[^\n\]*\\) DW_TAG_lexical_block" 0 } } */
      31  
      32  
      33  /* There are 3 DW_AT_inline attributes: one per abstract inline instance.
      34     The value of the attribute must be 0x3, meaning the function was
      35     actually inlined.  */
      36  /* { dg-final { scan-assembler-times  " DW_AT_inline \\(0x3\\)" 3 } } */
      37  
      38  volatile int *a;
      39  
      40  inline void
      41  third (int arg3)
      42  {
      43    int var3 = arg3;
      44    a[0] = var3;
      45  }
      46  
      47  inline void
      48  second (int arg2)
      49  {
      50    int var2 = arg2;
      51    third (var2+1);
      52  }
      53  
      54  inline void
      55  first (int arg1)
      56  {
      57    int var1 = arg1;
      58    second (var1+1);
      59  }
      60  
      61  int
      62  main ()
      63  {
      64    int some_int = 1;
      65    first (some_int);
      66    return 0;
      67  }
      68  
      69