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Revert "BlockFrequency: Saturate at 1 instead of 0 when multiplying a frequency with a branch probability."

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This reverts commit r184584. Breaks PPC selfhost.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184590 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2013-06-21 20:20:27 +00:00
parent 5a18572320
commit b47aceaf06
4 changed files with 3 additions and 95 deletions
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13
unittests/Support/BlockFrequencyTest.cpp
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@ -8,22 +8,11 @@ using namespace llvm;
namespace {
TEST(BlockFrequencyTest, ZeroToZero) {
BlockFrequency Freq(0);
BranchProbability Prob(UINT32_MAX - 1, UINT32_MAX);
Freq *= Prob;
EXPECT_EQ(Freq.getFrequency(), 0u);
Freq = 1;
Freq *= BranchProbability::getZero();
EXPECT_EQ(Freq.getFrequency(), 0u);
}
TEST(BlockFrequencyTest, OneToZero) {
BlockFrequency Freq(1);
BranchProbability Prob(UINT32_MAX - 1, UINT32_MAX);
Freq *= Prob;
EXPECT_EQ(Freq.getFrequency(), 1u);
EXPECT_EQ(Freq.getFrequency(), 0u);
}
TEST(BlockFrequencyTest, OneToOne) {