[llvm] [SPIR-V] Emit DebugTypePointer from NonSemantic DI (PR #109287)

[Michal Paszkowski via llvm-commits]

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@@ -146,8 +148,21 @@ bool SPIRVEmitNonSemanticDI::emitGlobalDI(MachineFunction &MF) {
           for (DbgVariableRecord &DVR : filterDbgVars(I.getDbgRecordRange())) {
             DILocalVariable *LocalVariable = DVR.getVariable();
             if (auto *BasicType =
-                    dyn_cast<DIBasicType>(LocalVariable->getType()))
+                    dyn_cast<DIBasicType>(LocalVariable->getType())) {
               BasicTypes.insert(BasicType);
+            } else if (auto *DerivedType =
+                           dyn_cast<DIDerivedType>(LocalVariable->getType())) {
+              if (DerivedType->getTag() == dwarf::DW_TAG_pointer_type) {
+                PointerDerivedTypes.insert(DerivedType);
+                // DIBasicType can be unreachable from DbgRecord and only
+                // pointed on from other DI types
+                // DerivedType->getBaseType is null when pointer
+                // is representing a void type
+                if (DerivedType->getBaseType())
+                  BasicTypes.insert(
+                      cast<DIBasicType>(DerivedType->getBaseType()));
+              }
+            }
           }
         }
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michalpaszkowski wrote:

Marking as resolved. @bwlodarcz is right. The number of casts needed here outweighs the one additional nesting.

https://github.com/llvm/llvm-project/pull/109287