DebugInfo: Add forwarding getFilename() accessor to new hierarchy

Add forwarding `getFilename()` and `getDirectory()` accessors to nodes
in the new hierarchy that define a `getFile()`.  Use that to
re-implement existing functionality in the `DIDescriptor` hierarchy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234671 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/IR/DebugInfo.h

@@ -222,8 +222,8 @@ public:
   ///
   /// If the scope node has a name, return that, else return an empty string.
   StringRef getName() const;
-  StringRef getFilename() const;
-  StringRef getDirectory() const;
+  StringRef getFilename() const { return get()->getFilename(); }
+  StringRef getDirectory() const { return get()->getDirectory(); }
 
   /// \brief Generate a reference to this DIScope.
   ///
@@ -697,8 +697,8 @@ public:
   unsigned isDefinition() const { return get()->isDefinition(); }
 
   DIScope getContext() const { return DIScope(get()->getScope()); }
-  StringRef getFilename() const { return getFile().getFilename(); }
-  StringRef getDirectory() const { return getFile().getDirectory(); }
+  StringRef getFilename() const { return get()->getFilename(); }
+  StringRef getDirectory() const { return get()->getDirectory(); }
   DITypeRef getType() const { return get()->getType(); }
 
   GlobalVariable *getGlobal() const;
@@ -812,8 +812,8 @@ public:
   DILocation getOrigLocation() const {
     return DILocation(get()->getInlinedAt());
   }
-  StringRef getFilename() const { return getScope().getFilename(); }
-  StringRef getDirectory() const { return getScope().getDirectory(); }
+  StringRef getFilename() const { return get()->getFilename(); }
+  StringRef getDirectory() const { return get()->getDirectory(); }
   bool atSameLineAs(const DILocation &Other) const {
     return (getLineNumber() == Other.getLineNumber() &&
             getFilename() == Other.getFilename());

include/llvm/IR/DebugInfoMetadata.h

@@ -416,6 +416,9 @@ protected:
 public:
   MDFile *getFile() const { return cast_or_null<MDFile>(getRawFile()); }
 
+  inline StringRef getFilename() const;
+  inline StringRef getDirectory() const;
+
   /// \brief Return the raw underlying file.
   ///
   /// An \a MDFile is an \a MDScope, but it doesn't point at a separate file
@@ -494,6 +497,18 @@ public:
   }
 };
 
+StringRef MDScope::getFilename() const {
+  if (auto *F = getFile())
+    return F->getFilename();
+  return "";
+}
+
+StringRef MDScope::getDirectory() const {
+  if (auto *F = getFile())
+    return F->getDirectory();
+  return "";
+}
+
 /// \brief Base class for types.
 ///
 /// TODO: Remove the hardcoded name and context, since many types don't use
@@ -1137,6 +1152,10 @@ public:
     return cast_or_null<MDLocation>(getRawInlinedAt());
   }
 
+  MDFile *getFile() const { return getScope()->getFile(); }
+  StringRef getFilename() const { return getScope()->getFilename(); }
+  StringRef getDirectory() const { return getScope()->getDirectory(); }
+
   /// \brief Get the scope where this is inlined.
   ///
   /// Walk through \a getInlinedAt() and return \a getScope() from the deepest
@@ -1628,6 +1647,17 @@ public:
   MDFile *getFile() const { return cast_or_null<MDFile>(getRawFile()); }
   MDTypeRef getType() const { return MDTypeRef(getRawType()); }
 
+  StringRef getFilename() const {
+    if (auto *F = getFile())
+      return F->getFilename();
+    return "";
+  }
+  StringRef getDirectory() const {
+    if (auto *F = getFile())
+      return F->getDirectory();
+    return "";
+  }
+
   Metadata *getRawScope() const { return getOperand(0); }
   MDString *getRawName() const { return getOperandAs<MDString>(1); }
   Metadata *getRawFile() const { return getOperand(2); }
@@ -2021,6 +2051,17 @@ public:
   StringRef getSetterName() const { return getStringOperand(3); }
   MDType *getType() const { return cast_or_null<MDType>(getRawType()); }
 
+  StringRef getFilename() const {
+    if (auto *F = getFile())
+      return F->getFilename();
+    return "";
+  }
+  StringRef getDirectory() const {
+    if (auto *F = getFile())
+      return F->getDirectory();
+    return "";
+  }
+
   MDString *getRawName() const { return getOperandAs<MDString>(0); }
   Metadata *getRawFile() const { return getOperand(1); }
   MDString *getRawGetterName() const { return getOperandAs<MDString>(2); }

lib/IR/DebugInfo.cpp

@@ -143,20 +143,6 @@ StringRef DIScope::getName() const {
   return StringRef();
 }
 
-StringRef DIScope::getFilename() const {
-  if (auto *N = get())
-    if (auto *F = N->getFile())
-      return F->getFilename();
-  return "";
-}
-
-StringRef DIScope::getDirectory() const {
-  if (auto *N = get())
-    if (auto *F = N->getFile())
-      return F->getDirectory();
-  return "";
-}
-
 void DICompileUnit::replaceSubprograms(DIArray Subprograms) {
   get()->replaceSubprograms(MDSubprogramArray(Subprograms));
 }