Report a warning when dropping outdated debug info metadata.

Use DiagnosticInfo to emit the warning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199346 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 33 insertions, 0 deletions

diff --git a/include/llvm/IR/DiagnosticInfo.h b/include/llvm/IR/DiagnosticInfo.h
index 151e155eaf..4c7af89d72 100644
--- a/include/llvm/IR/DiagnosticInfo.h
+++ b/include/llvm/IR/DiagnosticInfo.h
@@ -39,6 +39,7 @@ enum DiagnosticSeverity {
 enum DiagnosticKind {
   DK_InlineAsm,
   DK_StackSize,
+  DK_DebugMetadataVersion,
   DK_FirstPluginKind
 };
 
@@ -160,6 +161,35 @@ public:
   }
 };
 
+/// Diagnostic information for debug metadata version reporting.
+/// This is basically a module and a version.
+class DiagnosticInfoDebugMetadataVersion : public DiagnosticInfo {
+private:
+  /// The module that is concerned by this debug metadata version diagnostic.
+  const Module &M;
+  /// The actual metadata version.
+  unsigned MetadataVersion;
+
+public:
+  /// \p The module that is concerned by this debug metadata version diagnostic.
+  /// \p The actual metadata version.
+  DiagnosticInfoDebugMetadataVersion(const Module &M, unsigned MetadataVersion,
+                          DiagnosticSeverity Severity = DS_Warning)
+      : DiagnosticInfo(DK_DebugMetadataVersion, Severity), M(M),
+        MetadataVersion(MetadataVersion) {}
+
+  const Module &getModule() const { return M; }
+  unsigned getMetadataVersion() const { return MetadataVersion; }
+
+  /// \see DiagnosticInfo::print.
+  virtual void print(DiagnosticPrinter &DP) const;
+
+  /// Hand rolled RTTI.
+  static bool classof(const DiagnosticInfo *DI) {
+    return DI->getKind() == DK_DebugMetadataVersion;
+  }
+};
+
 } // End namespace llvm
 
 #endif
diff --git a/include/llvm/IR/DiagnosticPrinter.h b/include/llvm/IR/DiagnosticPrinter.h
index 721b1b4212..6177b7fe10 100644
--- a/include/llvm/IR/DiagnosticPrinter.h
+++ b/include/llvm/IR/DiagnosticPrinter.h
@@ -20,6 +20,7 @@
 
 namespace llvm {
 // Forward declarations.
+class Module;
 class raw_ostream;
 class StringRef;
 class Twine;
@@ -49,6 +50,7 @@ public:
 
   // IR related types.
   virtual DiagnosticPrinter &operator<<(const Value &V) = 0;
+  virtual DiagnosticPrinter &operator<<(const Module &M) = 0;
 };
 
 /// \brief Basic diagnostic printer that uses an underlying raw_ostream.
@@ -78,6 +80,7 @@ public:
 
   // IR related types.
   virtual DiagnosticPrinter &operator<<(const Value &V);
+  virtual DiagnosticPrinter &operator<<(const Module &M);
 };
 } // End namespace llvm