Add a couple of accessor methods to get the kind and values of an attribute.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173828 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/IR/Attributes.h b/include/llvm/IR/Attributes.h
index 1578789..5ebb629 100644
--- a/include/llvm/IR/Attributes.h
+++ b/include/llvm/IR/Attributes.h
@@ -28,6 +28,7 @@
 class AttributeImpl;
 class AttributeSetImpl;
 class AttributeSetNode;
+class Constant;
 class LLVMContext;
 class Type;
 
@@ -130,6 +131,12 @@
   /// \brief Return true if attributes exist
   bool hasAttributes() const;
 
+  /// \brief Return the kind of this attribute.
+  Constant *getAttributeKind() const;
+
+  /// \brief Return the value (if present) of the non-target-specific attribute.
+  ArrayRef<Constant*> getAttributeValues() const;
+
   /// \brief Returns the alignment field of an attribute as a byte alignment
   /// value.
   unsigned getAlignment() const;
diff --git a/lib/IR/Attributes.cpp b/lib/IR/Attributes.cpp
index a3f62ae..1a97110 100644
--- a/lib/IR/Attributes.cpp
+++ b/lib/IR/Attributes.cpp
@@ -83,6 +83,14 @@
   return pImpl && pImpl->hasAttributes();
 }
 
+Constant *Attribute::getAttributeKind() const {
+  return pImpl ? pImpl->getAttributeKind() : 0;
+}
+
+ArrayRef<Constant*> Attribute::getAttributeValues() const {
+  return pImpl ? pImpl->getAttributeValues() : ArrayRef<Constant*>();
+}
+
 /// This returns the alignment field of an attribute as a byte alignment value.
 unsigned Attribute::getAlignment() const {
   if (!hasAttribute(Attribute::Alignment))