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#include "Halide.h"
using namespace Halide;
using namespace Halide::Internal;
std::mt19937 rng;
int64_t sample(const ConstantInterval &i) {
int64_t upper = i.max_defined ? i.max : 1024;
int64_t lower = i.min_defined ? i.min : -1024;
return lower + (rng() % (upper - lower + 1));
}
ConstantInterval random_interval() {
int64_t a = (rng() % 512) - 256;
int64_t b = (rng() % 512) - 256;
ConstantInterval result;
if (rng() & 1) {
result.max_defined = true;
result.max = std::max(a, b);
}
if (rng() & 1) {
result.min_defined = true;
result.min = std::min(a, b);
}
return result;
}
int main(int argc, char **argv) {
for (int i = 0; i < 1000; i++) {
std::vector<std::pair<ConstantInterval, int64_t>> values;
for (int j = 0; j < 10; j++) {
values.emplace_back(random_interval(), 0);
values.back().second = sample(values.back().first);
}
for (int j = 0; j < 1000; j++) {
auto a = values[rng() % values.size()];
auto b = values[rng() % values.size()];
decltype(a) c;
auto check = [&](const char *op) {
if (!c.first.contains(c.second)) {
std::cout << "Error for operator " << op << ":\n"
<< "a: " << a.second << " in " << a.first << "\n"
<< "b: " << b.second << " in " << b.first << "\n"
<< "c: " << c.second << " not in " << c.first << "\n";
exit(1);
}
};
auto check_scalar = [&](const char *op) {
if (!c.first.contains(c.second)) {
std::cout << "Error for operator " << op << ":\n"
<< "a: " << a.second << " in " << a.first << "\n"
<< "b: " << b.second << "\n"
<< "c: " << c.second << " not in " << c.first << "\n";
exit(1);
}
};
// Arithmetic
if (!add_would_overflow(64, a.second, b.second)) {
c.first = a.first + b.first;
c.second = a.second + b.second;
check("+");
}
if (!sub_would_overflow(64, a.second, b.second)) {
c.first = a.first - b.first;
c.second = a.second - b.second;
check("-");
}
if (!mul_would_overflow(64, a.second, b.second)) {
c.first = a.first * b.first;
c.second = a.second * b.second;
check("*");
}
c.first = a.first / b.first;
c.second = div_imp(a.second, b.second);
check("/");
c.first = min(a.first, b.first);
c.second = std::min(a.second, b.second);
check("min");
c.first = max(a.first, b.first);
c.second = std::max(a.second, b.second);
check("max");
c.first = a.first % b.first;
c.second = mod_imp(a.second, b.second);
check("%");
// Arithmetic with constant RHS
if (!add_would_overflow(64, a.second, b.second)) {
c.first = a.first + b.second;
c.second = a.second + b.second;
check_scalar("+");
}
if (!sub_would_overflow(64, a.second, b.second)) {
c.first = a.first - b.second;
c.second = a.second - b.second;
check_scalar("-");
}
if (!mul_would_overflow(64, a.second, b.second)) {
c.first = a.first * b.second;
c.second = a.second * b.second;
check_scalar("*");
}
c.first = a.first / b.second;
c.second = div_imp(a.second, b.second);
check_scalar("/");
c.first = min(a.first, b.second);
c.second = std::min(a.second, b.second);
check_scalar("min");
c.first = max(a.first, b.second);
c.second = std::max(a.second, b.second);
check_scalar("max");
c.first = a.first % b.second;
c.second = mod_imp(a.second, b.second);
check_scalar("%");
// Some unary operators
c.first = -a.first;
c.second = -a.second;
check("unary -");
c.first = cast(UInt(8), a.first);
c.second = (int64_t)(uint8_t)(a.second);
check("cast to uint8");
c.first = cast(Int(8), a.first);
c.second = (int64_t)(int8_t)(a.second);
check("cast to uint8");
// Comparison
_halide_user_assert(!(a.first < b.first) || a.second < b.second)
<< a.first << " " << a.second << " " << b.first << " " << b.second;
_halide_user_assert(!(a.first <= b.first) || a.second <= b.second)
<< a.first << " " << a.second << " " << b.first << " " << b.second;
_halide_user_assert(!(a.first > b.first) || a.second > b.second)
<< a.first << " " << a.second << " " << b.first << " " << b.second;
_halide_user_assert(!(a.first >= b.first) || a.second >= b.second)
<< a.first << " " << a.second << " " << b.first << " " << b.second;
// Comparison against constants
_halide_user_assert(!(a.first < b.second) || a.second < b.second)
<< a.first << " " << a.second << " " << b.second;
_halide_user_assert(!(a.first <= b.second) || a.second <= b.second)
<< a.first << " " << a.second << " " << b.second;
_halide_user_assert(!(a.first > b.second) || a.second > b.second)
<< a.first << " " << a.second << " " << b.second;
_halide_user_assert(!(a.first >= b.second) || a.second >= b.second)
<< a.first << " " << a.second << " " << b.second;
_halide_user_assert(!(a.second < b.first) || a.second < b.second)
<< a.second << " " << b.first << " " << b.second;
_halide_user_assert(!(a.second <= b.first) || a.second <= b.second)
<< a.second << " " << b.first << " " << b.second;
_halide_user_assert(!(a.second > b.first) || a.second > b.second)
<< a.second << " " << b.first << " " << b.second;
_halide_user_assert(!(a.second >= b.first) || a.second >= b.second)
<< a.second << " " << b.first << " " << b.second;
}
}
printf("Success!\n");
return 0;
}
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