From 8f17dccdcb1dbfceaaf5b14ee1186c76b0584a35 Mon Sep 17 00:00:00 2001
From: Michael Gottesman <mgottesman@apple.com>
Date: Sat, 14 Dec 2013 02:24:22 +0000
Subject: [block-freq] Add a right shift to BlockFrequency that saturates at 1.

llvm-svn: 197302
---
 llvm/unittests/Support/BlockFrequencyTest.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'llvm/unittests/Support')

diff --git a/llvm/unittests/Support/BlockFrequencyTest.cpp b/llvm/unittests/Support/BlockFrequencyTest.cpp
index ffdea2c1790..c3184515046 100644
--- a/llvm/unittests/Support/BlockFrequencyTest.cpp
+++ b/llvm/unittests/Support/BlockFrequencyTest.cpp
@@ -237,4 +237,12 @@ TEST(BlockFrequencyTest, ProbabilityCompare) {
   EXPECT_FALSE(BigZero >= BigOne);
 }
 
+TEST(BlockFrequencyTest, SaturatingRightShift) {
+  BlockFrequency Freq(0x10080ULL);
+  Freq >>= 2;
+  EXPECT_EQ(Freq.getFrequency(), 0x4020ULL);
+  Freq >>= 20;
+  EXPECT_EQ(Freq.getFrequency(), 0x1ULL);
+}
+
 }
-- 
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