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#include "llvm/Support/DataTypes.h"
#include "llvm/Support/BlockFrequency.h"
#include "llvm/Support/BranchProbability.h"
#include "gtest/gtest.h"
#include <climits>
using namespace llvm;
namespace {
TEST(BlockFrequencyTest, OneToZero) {
BlockFrequency Freq(1);
BranchProbability Prob(UINT32_MAX - 1, UINT32_MAX);
Freq *= Prob;
EXPECT_EQ(Freq.getFrequency(), 0u);
}
TEST(BlockFrequencyTest, OneToOne) {
BlockFrequency Freq(1);
BranchProbability Prob(UINT32_MAX, UINT32_MAX);
Freq *= Prob;
EXPECT_EQ(Freq.getFrequency(), 1u);
}
TEST(BlockFrequencyTest, ThreeToOne) {
BlockFrequency Freq(3);
BranchProbability Prob(3000000, 9000000);
Freq *= Prob;
EXPECT_EQ(Freq.getFrequency(), 1u);
}
TEST(BlockFrequencyTest, MaxToHalfMax) {
BlockFrequency Freq(UINT64_MAX);
BranchProbability Prob(UINT32_MAX / 2, UINT32_MAX);
Freq *= Prob;
EXPECT_EQ(Freq.getFrequency(), 9223372034707292159LLu);
}
TEST(BlockFrequencyTest, BigToBig) {
const uint64_t Big = 387246523487234346LL;
const uint32_t P = 123456789;
BlockFrequency Freq(Big);
BranchProbability Prob(P, P);
Freq *= Prob;
EXPECT_EQ(Freq.getFrequency(), Big);
}
TEST(BlockFrequencyTest, MaxToMax) {
BlockFrequency Freq(UINT64_MAX);
BranchProbability Prob(UINT32_MAX, UINT32_MAX);
Freq *= Prob;
EXPECT_EQ(Freq.getFrequency(), UINT64_MAX);
}
}
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