1 files changed, 64 insertions, 0 deletions
diff --git a/llvm/unittests/Transforms/IPO/LowerBitSets.cpp b/llvm/unittests/Transforms/IPO/LowerBitSets.cpp
new file mode 100644
index 00000000000..796d90f29e9
--- /dev/null
+++ b/llvm/unittests/Transforms/IPO/LowerBitSets.cpp
@@ -0,0 +1,64 @@
+//===- LowerBitSets.cpp - Unit tests for bitset lowering ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/IPO/LowerBitSets.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+TEST(LowerBitSets, BitSetBuilder) {
+  struct {
+    std::vector<uint64_t> Offsets;
+    std::vector<uint8_t> Bits;
+    uint64_t ByteOffset;
+    uint64_t BitSize;
+    unsigned AlignLog2;
+    bool IsSingleOffset;
+  } BSBTests[] = {
+      {{}, {0}, 0, 1, 0, false},
+      {{0}, {1}, 0, 1, 0, true},
+      {{4}, {1}, 4, 1, 0, true},
+      {{37}, {1}, 37, 1, 0, true},
+      {{0, 1}, {3}, 0, 2, 0, false},
+      {{0, 4}, {3}, 0, 2, 2, false},
+      {{0, uint64_t(1) << 33}, {3}, 0, 2, 33, false},
+      {{3, 7}, {3}, 3, 2, 2, false},
+      {{0, 1, 7}, {131}, 0, 8, 0, false},
+      {{0, 2, 14}, {131}, 0, 8, 1, false},
+      {{0, 1, 8}, {3, 1}, 0, 9, 0, false},
+      {{0, 2, 16}, {3, 1}, 0, 9, 1, false},
+  };
+
+  for (auto &&T : BSBTests) {
+    BitSetBuilder BSB;
+    for (auto Offset : T.Offsets)
+      BSB.addOffset(Offset);
+
+    BitSetInfo BSI = BSB.build();
+
+    EXPECT_EQ(T.Bits, BSI.Bits);
+    EXPECT_EQ(T.ByteOffset, BSI.ByteOffset);
+    EXPECT_EQ(T.BitSize, BSI.BitSize);
+    EXPECT_EQ(T.AlignLog2, BSI.AlignLog2);
+    EXPECT_EQ(T.IsSingleOffset, BSI.isSingleOffset());
+
+    for (auto Offset : T.Offsets)
+      EXPECT_TRUE(BSI.containsGlobalOffset(Offset));
+
+    auto I = T.Offsets.begin();
+    for (uint64_t NonOffset = 0; NonOffset != 256; ++NonOffset) {
+      if (I != T.Offsets.end() && *I == NonOffset) {
+        ++I;
+        continue;
+      }
+
+      EXPECT_FALSE(BSI.containsGlobalOffset(NonOffset));
+    }
+  }
+}