Standardize the parsing of function type attributes in a way that

follows (as conservatively as possible) gcc's current behavior:  attributes
written on return types that don't apply there are applied to the function
instead, etc.  Only parse CC attributes as type attributes, not as decl attributes;
don't accepet noreturn as a decl attribute on ValueDecls, either (it still
needs to apply to other decls, like blocks).  Consistently consume CC/noreturn
information throughout codegen;  enforce this by removing their default values
in CodeGenTypes::getFunctionInfo().



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95436 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index 4e74759676..92498be2f5 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -810,6 +810,17 @@ const char *BuiltinType::getName(const LangOptions &LO) const {
   }
 }
 
+llvm::StringRef FunctionType::getNameForCallConv(CallingConv CC) {
+  switch (CC) {
+  case CC_Default: llvm_unreachable("no name for default cc");
+  default: return "";
+
+  case CC_C: return "cdecl";
+  case CC_X86StdCall: return "stdcall";
+  case CC_X86FastCall: return "fastcall";
+  }
+}
+
 void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID, QualType Result,
                                 arg_type_iterator ArgTys,
                                 unsigned NumArgs, bool isVariadic,