commit 5d3257e37ced7dd75023bb9c4619f297374f61d6
author Jakob Stoklund Olesen <stoklund@2pi.dk> Fri Jun 28 21:51:18 2013 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Fri Jun 28 21:51:18 2013 +0000
tree 2bece9af5caaf7bf70fc9af3b948f476ab1c93d0
parent 9e638df937b66e4313445163e069623b72b86f9a

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

unittests/Support/BlockFrequencyTest.cpp

diff --git a/unittests/Support/BlockFrequencyTest.cpp b/unittests/Support/BlockFrequencyTest.cpp
index 4bcddfe..ca420fc 100644
--- a/unittests/Support/BlockFrequencyTest.cpp
+++ b/unittests/Support/BlockFrequencyTest.cpp
@@ -68,6 +68,11 @@
   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) {