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Fix a bad overflow check pointed out by Ben.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185226 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2013-06-28 21:51:18 +00:00
parent 9e638df937
commit 5d3257e37c
2 changed files with 7 additions and 4 deletions
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5
unittests/Support/BlockFrequencyTest.cpp
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@ -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) {