From 410780b82c761075541bf5b58fbdb151d485bacc Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Sat, 12 Jan 2013 14:13:45 +0000
Subject: [PATCH] Add a unit test to verifies that attribute uniquing works so
 it doesn't break again.

The folding set details can be subtle and broke twice in the last couple of weeks.

llvm-svn: 172313
---
 llvm/unittests/IR/AttributesTest.cpp | 34 ++++++++++++++++++++++++++++
 llvm/unittests/IR/CMakeLists.txt     |  1 +
 2 files changed, 35 insertions(+)
 create mode 100644 llvm/unittests/IR/AttributesTest.cpp

diff --git a/llvm/unittests/IR/AttributesTest.cpp b/llvm/unittests/IR/AttributesTest.cpp
new file mode 100644
index 000000000000..627e10f4740d
--- /dev/null
+++ b/llvm/unittests/IR/AttributesTest.cpp
@@ -0,0 +1,34 @@
+//===- llvm/unittest/IR/AttributesTest.cpp - Attributes unit tests --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/IR/Attributes.h"
+#include "llvm/IR/LLVMContext.h"
+#include "gtest/gtest.h"
+using namespace llvm;
+
+namespace {
+
+TEST(Attributes, Uniquing) {
+  LLVMContext C;
+
+  Attribute AttrA = Attribute::get(C, Attribute::AlwaysInline);
+  Attribute AttrB = Attribute::get(C, Attribute::AlwaysInline);
+  EXPECT_EQ(AttrA, AttrB);
+
+  AttributeWithIndex AWIs[] = {
+    AttributeWithIndex::get(C, 1, Attribute::ZExt),
+    AttributeWithIndex::get(C, 2, Attribute::SExt)
+  };
+
+  AttributeSet SetA = AttributeSet::get(C, AWIs);
+  AttributeSet SetB = AttributeSet::get(C, AWIs);
+  EXPECT_EQ(SetA, SetB);
+}
+
+} // end anonymous namespace
diff --git a/llvm/unittests/IR/CMakeLists.txt b/llvm/unittests/IR/CMakeLists.txt
index 4ff94f70355c..aed45979c069 100644
--- a/llvm/unittests/IR/CMakeLists.txt
+++ b/llvm/unittests/IR/CMakeLists.txt
@@ -5,6 +5,7 @@ set(LLVM_LINK_COMPONENTS
   )
 
 set(IRSources
+  AttributesTest.cpp
   ConstantsTest.cpp
   DominatorTreeTest.cpp
   IRBuilderTest.cpp