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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-10-24 13:50:56 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-10-24 13:50:56 +0000 |
| commit | 13b10731abfc006fce790c5c8205cd24c7d67de8 (patch) | |
| tree | eb1a73b00a86c6246051239c5e58c7cb28c6b5ac /unittests | |
| parent | de1c9bb45017e25b5fc2b77e15d3c377f6572075 (diff) | |
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
Diffstat (limited to 'unittests')
| -rw-r--r-- | unittests/Support/BlockFrequencyTest.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
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); } } |