DI: Simplify DebugInfoFinder::processType(), NFC

Handle `DISubroutineType` up-front rather than as part of a branch for
`DICompositeTypeBase`.  The only shared code path was looking through
the base type, but `DISubroutineType` can never have a base type.

This also removes the last use of `DICompositeTypeBase`, since we can
strengthen the cast to `DICompositeType`.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243159 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/IR/DebugInfo.cpp b/lib/IR/DebugInfo.cpp
index cccbaf687f808efadd0df567af882add858e58e7..55e46b36a14ade0dc93e12fe5cda553a86e6f2fe 100644 (file)
--- a/lib/IR/DebugInfo.cpp
+++ b/lib/IR/DebugInfo.cpp
@@ -149,20 +149,22 @@ void DebugInfoFinder::processType(DIType *DT) {
   if (!addType(DT))
     return;
   processScope(DT->getScope().resolve(TypeIdentifierMap));
-  if (auto *DCT = dyn_cast<DICompositeTypeBase>(DT)) {
+  if (auto *ST = dyn_cast<DISubroutineType>(DT)) {
+    for (DITypeRef Ref : ST->getTypeArray())
+      processType(Ref.resolve(TypeIdentifierMap));
+    return;
+  }
+  if (auto *DCT = dyn_cast<DICompositeType>(DT)) {
     processType(DCT->getBaseType().resolve(TypeIdentifierMap));
-    if (auto *ST = dyn_cast<DISubroutineType>(DCT)) {
-      for (DITypeRef Ref : ST->getTypeArray())
-        processType(Ref.resolve(TypeIdentifierMap));
-      return;
-    }
     for (Metadata *D : DCT->getElements()) {
       if (auto *T = dyn_cast<DIType>(D))
         processType(T);
       else if (auto *SP = dyn_cast<DISubprogram>(D))
         processSubprogram(SP);
     }
-  } else if (auto *DDT = dyn_cast<DIDerivedType>(DT)) {
+    return;
+  }
+  if (auto *DDT = dyn_cast<DIDerivedType>(DT)) {
     processType(DDT->getBaseType().resolve(TypeIdentifierMap));
   }
 }