From 13b10731abfc006fce790c5c8205cd24c7d67de8 Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Mon, 24 Oct 2011 13:50:56 +0000 Subject: Implement comparison operators for BranchProbability in a way that can't overflow INT64_MAX. Add a test case for the edge case that triggers this. Thanks to Chandler for bringing this to my attention. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142794 91177308-0d34-0410-b5e6-96231b3b80d8 --- unittests/Support/BlockFrequencyTest.cpp | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'unittests/Support') diff --git a/unittests/Support/BlockFrequencyTest.cpp b/unittests/Support/BlockFrequencyTest.cpp index ac3cedf186..df256424b8 100644 --- a/unittests/Support/BlockFrequencyTest.cpp +++ b/unittests/Support/BlockFrequencyTest.cpp @@ -71,6 +71,15 @@ TEST(BlockFrequencyTest, ProbabilityCompare) { EXPECT_TRUE(B > C); EXPECT_FALSE(B <= C); EXPECT_TRUE(B >= C); + + BranchProbability BigZero(0, UINT32_MAX); + BranchProbability BigOne(UINT32_MAX, UINT32_MAX); + EXPECT_FALSE(BigZero == BigOne); + EXPECT_TRUE(BigZero != BigOne); + EXPECT_TRUE(BigZero < BigOne); + EXPECT_FALSE(BigZero > BigOne); + EXPECT_TRUE(BigZero <= BigOne); + EXPECT_FALSE(BigZero >= BigOne); } } -- cgit v1.2.3