Add LLVMGetAttrKindIDInContext in the C API in order to facilitate migration away from LLVMAttribute

Summary: LLVMAttribute has outlived its utility and is becoming a problem for C API users that what to use all the LLVM attributes. In order to help moving away from LLVMAttribute in a smooth manner, this diff introduce LLVMGetAttrKindIDInContext, which can be used instead of the enum values.

Reviewers: Wallbraker, whitequark, joker.eph, echristo

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D18749

llvm-svn: 266257

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
index 1b4ad203969..147700dea0a 100644
--- a/llvm/lib/IR/Core.cpp
+++ b/llvm/lib/IR/Core.cpp
@@ -13,6 +13,8 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm-c/Core.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "AttributeImpl.h"
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/IR/Attributes.h"
 #include "llvm/IR/CallSite.h"
@@ -119,6 +121,16 @@ unsigned LLVMGetMDKindID(const char *Name, unsigned SLen) {
   return LLVMGetMDKindIDInContext(LLVMGetGlobalContext(), Name, SLen);
 }
 
+#define GET_ATTR_KIND_FROM_NAME
+#include "AttributesCompatFunc.inc"
+
+unsigned LLVMGetAttrKindIDInContext(LLVMContextRef C, const char *Name,
+                                    size_t SLen) {
+  auto K = getAttrKindFromName(StringRef(Name, SLen));
+  assert(K != Attribute::None && "Invalid attribute");
+  return AttributeImpl::getAttrMask(K);
+}
+
 char *LLVMGetDiagInfoDescription(LLVMDiagnosticInfoRef DI) {
   std::string MsgStorage;
   raw_string_ostream Stream(MsgStorage);