Replace the unit test of BranchProbability::normalizeEdgeWeights() with BranchProbabi...

[oota-llvm.git] / unittests / Support / BranchProbabilityTest.cpp

diff --git a/unittests/Support/BranchProbabilityTest.cpp b/unittests/Support/BranchProbabilityTest.cpp
index 87a250919475aad3b32c91e024d9fcddc5429b43..847661d21b38169a9790f15a4bc5a557e01ff7e0 100644 (file)
--- a/unittests/Support/BranchProbabilityTest.cpp
+++ b/unittests/Support/BranchProbabilityTest.cpp
@@ -287,4 +287,41 @@ TEST(BranchProbabilityTest, scaleBruteForce) {
   }
 }
 
+TEST(BranchProbabilityTest, NormalizeProbabilities) {
+  {
+    SmallVector<BranchProbability, 2> Probs{{0, 1}, {0, 1}};
+    BranchProbability::normalizeProbabilities(Probs.begin(), Probs.end());
+    EXPECT_EQ(BranchProbability::getDenominator() / 2, Probs[0].getNumerator());
+    EXPECT_EQ(BranchProbability::getDenominator() / 2, Probs[1].getNumerator());
+  }
+  {
+    SmallVector<BranchProbability, 2> Probs{{0, 1}, {1, 1}};
+    BranchProbability::normalizeProbabilities(Probs.begin(), Probs.end());
+    EXPECT_EQ(0u, Probs[0].getNumerator());
+    EXPECT_EQ(BranchProbability::getDenominator(), Probs[1].getNumerator());
+  }
+  {
+    SmallVector<BranchProbability, 2> Probs{{1, 100}, {1, 100}};
+    BranchProbability::normalizeProbabilities(Probs.begin(), Probs.end());
+    EXPECT_EQ(BranchProbability::getDenominator() / 2, Probs[0].getNumerator());
+    EXPECT_EQ(BranchProbability::getDenominator() / 2, Probs[1].getNumerator());
+  }
+  {
+    SmallVector<BranchProbability, 2> Probs{{1, 1}, {1, 1}};
+    BranchProbability::normalizeProbabilities(Probs.begin(), Probs.end());
+    EXPECT_EQ(BranchProbability::getDenominator() / 2, Probs[0].getNumerator());
+    EXPECT_EQ(BranchProbability::getDenominator() / 2, Probs[1].getNumerator());
+  }
+  {
+    SmallVector<BranchProbability, 3> Probs{{1, 1}, {1, 1}, {1, 1}};
+    BranchProbability::normalizeProbabilities(Probs.begin(), Probs.end());
+    EXPECT_EQ(BranchProbability::getDenominator() / 3 + 1,
+              Probs[0].getNumerator());
+    EXPECT_EQ(BranchProbability::getDenominator() / 3 + 1,
+              Probs[1].getNumerator());
+    EXPECT_EQ(BranchProbability::getDenominator() / 3 + 1,
+              Probs[2].getNumerator());
+  }
+}
+
 }