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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2013-06-28 21:51:18 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2013-06-28 21:51:18 +0000 |
| commit | 3192b2fceabc4d0d9fb91fcef59cde41749b66a0 (patch) | |
| tree | 5eed3c2cc599d299d1ac73e6761b74d7e95398ba /llvm/unittests/Support/BlockFrequencyTest.cpp | |
| parent | 7291340c24238eef13dc12245db597ad793cf2b6 (diff) | |
| download | bcm5719-llvm-3192b2fceabc4d0d9fb91fcef59cde41749b66a0.tar.gz bcm5719-llvm-3192b2fceabc4d0d9fb91fcef59cde41749b66a0.zip | |
Fix a bad overflow check pointed out by Ben.
llvm-svn: 185226
Diffstat (limited to 'llvm/unittests/Support/BlockFrequencyTest.cpp')
| -rw-r--r-- | llvm/unittests/Support/BlockFrequencyTest.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/unittests/Support/BlockFrequencyTest.cpp b/llvm/unittests/Support/BlockFrequencyTest.cpp index 4bcddfebd9a..ca420fccaa5 100644 --- a/llvm/unittests/Support/BlockFrequencyTest.cpp +++ b/llvm/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) { |
