Preserve exceptions information during calls code generation.

This patch changes the generation of CGFunctionInfo to contain 
the FunctionProtoType if it is available. This enables the code 
generation for call instructions to look into this type for 
exception information and therefore generate better quality 
IR - it will not create invoke instructions for functions that 
are know not to throw.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@253926 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 23 insertions, 0 deletions

diff --git a/include/clang/CodeGen/CGFunctionInfo.h b/include/clang/CodeGen/CGFunctionInfo.h
index a3ce8c2b9f..bb6ceb4351 100644
--- a/include/clang/CodeGen/CGFunctionInfo.h
+++ b/include/clang/CodeGen/CGFunctionInfo.h
@@ -509,6 +509,29 @@ public:
   }
 };
 
+/// CGCalleeInfo - Class to encapsulate the information about a callee to be
+/// used during the generation of call/invoke instructions.
+class CGCalleeInfo {
+  /// \brief The function proto type of the callee.
+  const FunctionProtoType *CalleeProtoTy;
+  /// \brief The function declaration of the callee.
+  const Decl *CalleeDecl;
+
+public:
+  explicit CGCalleeInfo() : CalleeProtoTy(nullptr), CalleeDecl(nullptr) {}
+  CGCalleeInfo(const FunctionProtoType *calleeProtoTy, const Decl *calleeDecl)
+      : CalleeProtoTy(calleeProtoTy), CalleeDecl(calleeDecl) {}
+  CGCalleeInfo(const FunctionProtoType *calleeProtoTy)
+      : CalleeProtoTy(calleeProtoTy), CalleeDecl(nullptr) {}
+  CGCalleeInfo(const Decl *calleeDecl)
+      : CalleeProtoTy(nullptr), CalleeDecl(calleeDecl) {}
+
+  const FunctionProtoType *getCalleeFunctionProtoType() {
+    return CalleeProtoTy;
+  }
+  const Decl *getCalleeDecl() { return CalleeDecl; }
+};
+
 }  // end namespace CodeGen
 }  // end namespace clang