Support: Add unit tests for BranchProbability

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207540 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 91 insertions, 0 deletions

diff --git a/unittests/Support/BranchProbabilityTest.cpp b/unittests/Support/BranchProbabilityTest.cpp
new file mode 100644
index 0000000000..56ab22334c
--- /dev/null
+++ b/unittests/Support/BranchProbabilityTest.cpp
@@ -0,0 +1,90 @@
+//===- unittest/Support/BranchProbabilityTest.cpp - BranchProbability tests -=//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/BranchProbability.h"
+#include "llvm/Support/raw_ostream.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+namespace llvm {
+void PrintTo(const BranchProbability &P, ::std::ostream *os) {
+  *os << P.getNumerator() << "/" << P.getDenominator();
+}
+}
+namespace {
+
+typedef BranchProbability BP;
+TEST(BranchProbabilityTest, Accessors) {
+  EXPECT_EQ(1u, BP(1, 7).getNumerator());
+  EXPECT_EQ(7u, BP(1, 7).getDenominator());
+  EXPECT_EQ(0u, BP::getZero().getNumerator());
+  EXPECT_EQ(1u, BP::getZero().getDenominator());
+  EXPECT_EQ(1u, BP::getOne().getNumerator());
+  EXPECT_EQ(1u, BP::getOne().getDenominator());
+}
+
+TEST(BranchProbabilityTest, Operators) {
+  EXPECT_TRUE(BP(1, 7) < BP(2, 7));
+  EXPECT_TRUE(BP(1, 7) < BP(1, 4));
+  EXPECT_TRUE(BP(5, 7) < BP(3, 4));
+  EXPECT_FALSE(BP(1, 7) < BP(1, 7));
+  EXPECT_FALSE(BP(1, 7) < BP(2, 14));
+  EXPECT_FALSE(BP(4, 7) < BP(1, 2));
+  EXPECT_FALSE(BP(4, 7) < BP(3, 7));
+
+  EXPECT_FALSE(BP(1, 7) > BP(2, 7));
+  EXPECT_FALSE(BP(1, 7) > BP(1, 4));
+  EXPECT_FALSE(BP(5, 7) > BP(3, 4));
+  EXPECT_FALSE(BP(1, 7) > BP(1, 7));
+  EXPECT_FALSE(BP(1, 7) > BP(2, 14));
+  EXPECT_TRUE(BP(4, 7) > BP(1, 2));
+  EXPECT_TRUE(BP(4, 7) > BP(3, 7));
+
+  EXPECT_TRUE(BP(1, 7) <= BP(2, 7));
+  EXPECT_TRUE(BP(1, 7) <= BP(1, 4));
+  EXPECT_TRUE(BP(5, 7) <= BP(3, 4));
+  EXPECT_TRUE(BP(1, 7) <= BP(1, 7));
+  EXPECT_TRUE(BP(1, 7) <= BP(2, 14));
+  EXPECT_FALSE(BP(4, 7) <= BP(1, 2));
+  EXPECT_FALSE(BP(4, 7) <= BP(3, 7));
+
+  EXPECT_FALSE(BP(1, 7) >= BP(2, 7));
+  EXPECT_FALSE(BP(1, 7) >= BP(1, 4));
+  EXPECT_FALSE(BP(5, 7) >= BP(3, 4));
+  EXPECT_TRUE(BP(1, 7) >= BP(1, 7));
+  EXPECT_TRUE(BP(1, 7) >= BP(2, 14));
+  EXPECT_TRUE(BP(4, 7) >= BP(1, 2));
+  EXPECT_TRUE(BP(4, 7) >= BP(3, 7));
+
+  EXPECT_FALSE(BP(1, 7) == BP(2, 7));
+  EXPECT_FALSE(BP(1, 7) == BP(1, 4));
+  EXPECT_FALSE(BP(5, 7) == BP(3, 4));
+  EXPECT_TRUE(BP(1, 7) == BP(1, 7));
+  EXPECT_TRUE(BP(1, 7) == BP(2, 14));
+  EXPECT_FALSE(BP(4, 7) == BP(1, 2));
+  EXPECT_FALSE(BP(4, 7) == BP(3, 7));
+
+  EXPECT_TRUE(BP(1, 7) != BP(2, 7));
+  EXPECT_TRUE(BP(1, 7) != BP(1, 4));
+  EXPECT_TRUE(BP(5, 7) != BP(3, 4));
+  EXPECT_FALSE(BP(1, 7) != BP(1, 7));
+  EXPECT_FALSE(BP(1, 7) != BP(2, 14));
+  EXPECT_TRUE(BP(4, 7) != BP(1, 2));
+  EXPECT_TRUE(BP(4, 7) != BP(3, 7));
+}
+
+TEST(BranchProbabilityTest, getCompl) {
+  EXPECT_EQ(BP(5, 7), BP(2, 7).getCompl());
+  EXPECT_EQ(BP(2, 7), BP(5, 7).getCompl());
+  EXPECT_EQ(BP::getZero(), BP(7, 7).getCompl());
+  EXPECT_EQ(BP::getOne(), BP(0, 7).getCompl());
+}
+
+}
diff --git a/unittests/Support/CMakeLists.txt b/unittests/Support/CMakeLists.txt
index 44f80ac222..0ea9310333 100644
--- a/unittests/Support/CMakeLists.txt
+++ b/unittests/Support/CMakeLists.txt
@@ -7,6 +7,7 @@ add_llvm_unittest(SupportTests
   AllocatorTest.cpp
   ArrayRecyclerTest.cpp
   BlockFrequencyTest.cpp
+  BranchProbabilityTest.cpp
   Casting.cpp
   CommandLineTest.cpp
   CompressionTest.cpp