[llvm] [LLVM][DWARF] Add compilation directory and dwo name to TU in dwo section (PR #74909)

[David Blaikie via llvm-commits]

================
@@ -199,13 +200,36 @@
 ; CHECK-SPLIT-NEXT:         Abbrev: [[ABBREV4]]
 ; CHECK-SPLIT-NEXT:         Tag: DW_TAG_base_type
 ; CHECK-SPLIT-NEXT:         DW_IDX_type_unit: 0x00
-; CHECK-SPLIT-NEXT:         DW_IDX_die_offset: 0x00000034
+; CHECK-SPLIT-NEXT:         DW_IDX_die_offset: 0x00000036
 ; CHECK-SPLIT-NEXT:       }
 ; CHECK-SPLIT-NEXT:     }
 ; CHECK-SPLIT-NEXT:   ]
 ; CHECK-SPLIT-NEXT: }
 
 
+
+; RUN: llvm-dwarfdump -debug-info -r 0 %t > %tdebugInfo.txt
+; RUN: llvm-dwarfdump -debug-info -r 0 %t.mainTypes.dwo >> %tdebugInfo.txt
+; RUN: cat %tdebugInfo.txt | FileCheck %s --check-prefixes=CHECK-TYPE
+
+; CHECK-TYPE:         DW_TAG_skeleton_unit
+; CHECK-TYPE-NEXT:      DW_AT_stmt_list
+; CHECK-TYPE-NEXT:      DW_AT_str_offsets_base
+; CHECK-TYPE-NEXT:      DW_AT_comp_dir  ("/typeSmall")
+; CHECK-TYPE-NEXT:      DW_AT_dwo_name
+; CHECK-TYPE-SAME:        debug-names-types.ll.tmp.mainTypes.dwo
+; CHECK-TYPE-NEXT:      DW_AT_low_pc
+; CHECK-TYPE-NEXT:      DW_AT_high_pc
+; CHECK-TYPE-NEXT:      DW_AT_addr_base
+
+; CHECK-TYPE: .debug_info.dwo contents
+; CHECK-TYPE:        DW_TAG_type_unit
+; CHECK-TYPE-NEXT:      DW_AT_language
+; CHECK-TYPE-NEXT:      DW_AT_comp_dir  ("/typeSmall")
+; CHECK-TYPE-NEXT:      DW_AT_dwo_name
+; CHECK-TYPE-SAME:        debug-names-types.ll.tmp.mainTypes.dwo
+; CHECK-TYPE-NEXT:      DW_AT_stmt_list
----------------
dwblaikie wrote:

Oh, you can simplify this a bit.
```
CHECK-TYPE: DW_TAG_type_unit
CHECK-TYPE-NOT: DW_TAG
CHECK-TYPE: DW_AT_comp_dir
CHECK-TYPE-NOT: DW_TAG
CHECK-TYPE: DW_AT_dwo_name
```

This way the test isn't so brittle to other attribute changes/additions/removals.

https://github.com/llvm/llvm-project/pull/74909