[LLVM-C] Expose User::getOperandUse as LLVMGetOperandUse.

Patch by Gabriel Radanne <drupyog@zoho.com>

llvm-svn: 215419
diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
index 8bc0bb9..2b2ccb9 100644
--- a/llvm/lib/IR/Core.cpp
+++ b/llvm/lib/IR/Core.cpp
@@ -603,6 +603,11 @@
   return wrap(cast<User>(V)->getOperand(Index));
 }
 
+LLVMUseRef LLVMGetOperandUse(LLVMValueRef Val, unsigned Index) {
+  Value *V = unwrap(Val);
+  return wrap(&cast<User>(V)->getOperandUse(Index));
+}
+
 void LLVMSetOperand(LLVMValueRef Val, unsigned Index, LLVMValueRef Op) {
   unwrap<User>(Val)->setOperand(Index, unwrap(Op));
 }