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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2013-06-28 21:51:18 +0000 |
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| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2013-06-28 21:51:18 +0000 |
| commit | 5d3257e37ced7dd75023bb9c4619f297374f61d6 (patch) | |
| tree | 2bece9af5caaf7bf70fc9af3b948f476ab1c93d0 /unittests | |
| parent | 9e638df937b66e4313445163e069623b72b86f9a (diff) | |
| download | llvm-5d3257e37ced7dd75023bb9c4619f297374f61d6.tar.gz llvm-5d3257e37ced7dd75023bb9c4619f297374f61d6.tar.bz2 llvm-5d3257e37ced7dd75023bb9c4619f297374f61d6.tar.xz | |
Fix a bad overflow check pointed out by Ben.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185226 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'unittests')
| -rw-r--r-- | unittests/Support/BlockFrequencyTest.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/unittests/Support/BlockFrequencyTest.cpp b/unittests/Support/BlockFrequencyTest.cpp index 4bcddfebd9..ca420fccaa 100644 --- a/unittests/Support/BlockFrequencyTest.cpp +++ b/unittests/Support/BlockFrequencyTest.cpp @@ -68,6 +68,11 @@ TEST(BlockFrequencyTest, Saturate) { Freq = 0x1000000000000000ULL; Freq /= BranchProbability(10000, 160000); EXPECT_EQ(Freq.getFrequency(), UINT64_MAX); + + // Try to cheat the multiplication overflow check. + Freq = 0x00000001f0000001ull; + Freq /= BranchProbability(1000, 0xf000000f); + EXPECT_EQ(33506781356485509ULL, Freq.getFrequency()); } TEST(BlockFrequencyTest, ProbabilityCompare) { |