[Annotation] Allows annotation to carry some additional constant arguments.

This allows using annotation in a much more contexts than it currently has.
especially when annotation with template or constexpr.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D88645

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index b3babc8..cb5b9bd 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -413,6 +413,9 @@ private:
   /// Map used to get unique annotation strings.
   llvm::StringMap<llvm::Constant*> AnnotationStrings;
 
+  /// Used for uniquing of annotation arguments.
+  llvm::DenseMap<unsigned, llvm::Constant *> AnnotationArgs;
+
   llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap;
 
   llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap;
@@ -1241,6 +1244,9 @@ public:
   /// Emit the annotation line number.
   llvm::Constant *EmitAnnotationLineNo(SourceLocation L);
 
+  /// Emit additional args of the annotation.
+  llvm::Constant *EmitAnnotationArgs(const AnnotateAttr *Attr);
+
   /// Generate the llvm::ConstantStruct which contains the annotation
   /// information for a given GlobalValue. The annotation struct is
   /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the