Add LLVMGetAttrKindID 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.

See D18749 for reference.

Reviewers: Wallbraker, whitequark, joker.eph, echristo, rafael

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D19081

llvm-svn: 266842

1 files changed, 13 insertions, 0 deletions

diff --git a/llvm/include/llvm-c/Core.h b/llvm/include/llvm-c/Core.h
index d9b6712ac27..0c3d76d6f9b 100644
--- a/llvm/include/llvm-c/Core.h
+++ b/llvm/include/llvm-c/Core.h
@@ -477,6 +477,19 @@ unsigned LLVMGetMDKindIDInContext(LLVMContextRef C, const char *Name,
 unsigned LLVMGetMDKindID(const char *Name, unsigned SLen);
 
 /**
+ * Return an unique id given the name of a target independent attribute,
+ * or 0 if no attribute by that name exists.
+ *
+ * See http://llvm.org/docs/LangRef.html#parameter-attributes
+ * and http://llvm.org/docs/LangRef.html#function-attributes
+ * for the list of available attributes.
+ *
+ * NB: Attribute names and/or id are subject to change without
+ * going through the C API deprecation cycle.
+ */
+unsigned LLVMGetAttrKindID(const char *Name, size_t SLen);
+
+/**
  * @}
  */