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Revert "[MLIR][Presburger] introduce MPInt to support fast arbitrary precision in Presburger" 

This reverts commit c9035df2fa.
Reverting due to build failure on Windows: https://lab.llvm.org/buildbot/#/builders/172/builds/14767
This commit is contained in:
Arjun P 2022-07-11 14:16:52 +01:00
parent 419cc0a0b2
commit 1e10d35ea9
5 changed files with 12 additions and 687 deletions
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597
mlir/include/mlir/Analysis/Presburger/MPInt.h
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@ -1,597 +0,0 @@
//===- MPInt.h - MLIR MPInt Class -------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This is a simple class to represent arbitrary precision signed integers.
// Unlike APInt, one does not have to specify a fixed maximum size, and the
// integer can take on any arbitrary values. This is optimized for small-values
// by providing fast-paths for the cases when the value stored fits in 64-bits.
//
//===----------------------------------------------------------------------===//
#ifndef MLIR_ANALYSIS_PRESBURGER_MPINT_H
#define MLIR_ANALYSIS_PRESBURGER_MPINT_H
#include "mlir/Analysis/Presburger/SlowMPInt.h"
#include "mlir/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
namespace mlir {
namespace presburger {
namespace detail {
// If builtin intrinsics for overflow-checked arithmetic are available,
// use them. Otherwise, call through to LLVM's overflow-checked arithmetic
// functionality. Those functions also have such macro-gated uses of intrinsics,
// however they are not always_inlined, which is important for us to achieve
// high-performance; calling the functions directly would result in a slowdown
// of 1.15x.
LLVM_ATTRIBUTE_ALWAYS_INLINE bool addOverflow(int64_t x, int64_t y,
int64_t &result) {
#if __has_builtin(__builtin_add_overflow)
return __builtin_add_overflow(x, y, &result);
#else
return llvm::AddOverflow(x, y, result);
#endif
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool subOverflow(int64_t x, int64_t y,
int64_t &result) {
#if __has_builtin(__builtin_sub_overflow)
return __builtin_sub_overflow(x, y, &result);
#else
return llvm::SubOverflow(x, y, result);
#endif
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool mulOverflow(int64_t x, int64_t y,
int64_t &result) {
#if __has_builtin(__builtin_mul_overflow)
return __builtin_mul_overflow(x, y, &result);
#else
return llvm::MulOverflow(x, y, result);
#endif
}
} // namespace detail
/// This class provides support for multi-precision arithmetic.
///
/// Unlike APInt, this extends the precision as necessary to prevent overflows
/// and supports operations between objects with differing internal precisions.
///
/// This is optimized for small-values by providing fast-paths for the cases
/// when the value stored fits in 64-bits. We annotate all fastpaths by using
/// the LLVM_LIKELY/LLVM_UNLIKELY annotations. Removing these would result in
/// a 1.2x performance slowdown.
///
/// We always_inline all operations; removing these results in a 1.5x
/// performance slowdown.
///
/// When holdsLarge is true, a SlowMPInt is held in the union. If it is false,
/// the int64_t is held. Using std::variant instead would lead to significantly
/// worse performance.
class MPInt {
private:
union {
int64_t valSmall;
detail::SlowMPInt valLarge;
};
unsigned holdsLarge;
LLVM_ATTRIBUTE_ALWAYS_INLINE void initSmall(int64_t o) {
if (LLVM_UNLIKELY(isLarge()))
valLarge.detail::SlowMPInt::~SlowMPInt();
valSmall = o;
holdsLarge = false;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE void initLarge(const detail::SlowMPInt &o) {
if (LLVM_LIKELY(isSmall())) {
// The data in memory could be in an arbitrary state, not necessarily
// corresponding to any valid state of valLarge; we cannot call any member
// functions, e.g. the assignment operator on it, as they may access the
// invalid internal state. We instead construct a new object using
// placement new.
new (&valLarge) detail::SlowMPInt(o);
} else {
// In this case, we need to use the assignment operator, because if we use
// placement-new as above we would lose track of allocated memory
// and leak it.
valLarge = o;
}
holdsLarge = true;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE explicit MPInt(const detail::SlowMPInt &val)
: valLarge(val), holdsLarge(true) {}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool isSmall() const { return !holdsLarge; }
LLVM_ATTRIBUTE_ALWAYS_INLINE bool isLarge() const { return holdsLarge; }
/// Get the stored value. For getSmall/Large,
/// the stored value should be small/large.
LLVM_ATTRIBUTE_ALWAYS_INLINE int64_t getSmall() const {
assert(isSmall() &&
"getSmall should only be called when the value stored is small!");
return valSmall;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE int64_t &getSmall() {
assert(isSmall() &&
"getSmall should only be called when the value stored is small!");
return valSmall;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE const detail::SlowMPInt &getLarge() const {
assert(isLarge() &&
"getLarge should only be called when the value stored is large!");
return valLarge;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE detail::SlowMPInt &getLarge() {
assert(isLarge() &&
"getLarge should only be called when the value stored is large!");
return valLarge;
}
explicit operator detail::SlowMPInt() const {
if (isSmall())
return detail::SlowMPInt(getSmall());
return getLarge();
}
public:
LLVM_ATTRIBUTE_ALWAYS_INLINE explicit MPInt(int64_t val)
: valSmall(val), holdsLarge(false) {}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt() : MPInt(0) {}
LLVM_ATTRIBUTE_ALWAYS_INLINE ~MPInt() {
if (LLVM_UNLIKELY(isLarge()))
valLarge.detail::SlowMPInt::~SlowMPInt();
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt(const MPInt &o)
: valSmall(o.valSmall), holdsLarge(false) {
if (LLVM_UNLIKELY(o.isLarge()))
initLarge(o.valLarge);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &operator=(const MPInt &o) {
if (LLVM_LIKELY(o.isSmall())) {
initSmall(o.valSmall);
return *this;
}
initLarge(o.valLarge);
return *this;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &operator=(int x) {
initSmall(x);
return *this;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE explicit operator int64_t() const {
if (isSmall())
return getSmall();
return static_cast<int64_t>(getLarge());
}
bool operator==(const MPInt &o) const;
bool operator!=(const MPInt &o) const;
bool operator>(const MPInt &o) const;
bool operator<(const MPInt &o) const;
bool operator<=(const MPInt &o) const;
bool operator>=(const MPInt &o) const;
MPInt operator+(const MPInt &o) const;
MPInt operator-(const MPInt &o) const;
MPInt operator*(const MPInt &o) const;
MPInt operator/(const MPInt &o) const;
MPInt operator%(const MPInt &o) const;
MPInt &operator+=(const MPInt &o);
MPInt &operator-=(const MPInt &o);
MPInt &operator*=(const MPInt &o);
MPInt &operator/=(const MPInt &o);
MPInt &operator%=(const MPInt &o);
MPInt operator-() const;
MPInt &operator++();
MPInt &operator--();
// Divide by a number that is known to be positive.
// This is slightly more efficient because it saves an overflow check.
MPInt divByPositive(const MPInt &o) const;
MPInt &divByPositiveInPlace(const MPInt &o);
friend MPInt abs(const MPInt &x);
friend MPInt gcdRange(ArrayRef<MPInt> range);
friend MPInt ceilDiv(const MPInt &lhs, const MPInt &rhs);
friend MPInt floorDiv(const MPInt &lhs, const MPInt &rhs);
friend MPInt gcd(const MPInt &a, const MPInt &b);
friend MPInt lcm(const MPInt &a, const MPInt &b);
friend MPInt mod(const MPInt &lhs, const MPInt &rhs);
llvm::raw_ostream &print(llvm::raw_ostream &os) const;
void dump() const;
/// ---------------------------------------------------------------------------
/// Convenience operator overloads for int64_t.
/// ---------------------------------------------------------------------------
friend MPInt &operator+=(MPInt &a, int64_t b);
friend MPInt &operator-=(MPInt &a, int64_t b);
friend MPInt &operator*=(MPInt &a, int64_t b);
friend MPInt &operator/=(MPInt &a, int64_t b);
friend MPInt &operator%=(MPInt &a, int64_t b);
friend bool operator==(const MPInt &a, int64_t b);
friend bool operator!=(const MPInt &a, int64_t b);
friend bool operator>(const MPInt &a, int64_t b);
friend bool operator<(const MPInt &a, int64_t b);
friend bool operator<=(const MPInt &a, int64_t b);
friend bool operator>=(const MPInt &a, int64_t b);
friend MPInt operator+(const MPInt &a, int64_t b);
friend MPInt operator-(const MPInt &a, int64_t b);
friend MPInt operator*(const MPInt &a, int64_t b);
friend MPInt operator/(const MPInt &a, int64_t b);
friend MPInt operator%(const MPInt &a, int64_t b);
friend bool operator==(int64_t a, const MPInt &b);
friend bool operator!=(int64_t a, const MPInt &b);
friend bool operator>(int64_t a, const MPInt &b);
friend bool operator<(int64_t a, const MPInt &b);
friend bool operator<=(int64_t a, const MPInt &b);
friend bool operator>=(int64_t a, const MPInt &b);
friend MPInt operator+(int64_t a, const MPInt &b);
friend MPInt operator-(int64_t a, const MPInt &b);
friend MPInt operator*(int64_t a, const MPInt &b);
friend MPInt operator/(int64_t a, const MPInt &b);
friend MPInt operator%(int64_t a, const MPInt &b);
friend llvm::hash_code hash_value(const MPInt &x); // NOLINT
};
/// This just calls through to the operator int64_t, but it's useful when a
/// function pointer is required. (Although this is marked inline, it is still
/// possible to obtain and use a function pointer to this.)
LLVM_ATTRIBUTE_ALWAYS_INLINE int64_t int64FromMPInt(const MPInt &x) {
return int64_t(x);
}
llvm::raw_ostream &operator<<(llvm::raw_ostream &os, const MPInt &x);
// The RHS is always expected to be positive, and the result
/// is always non-negative.
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt mod(const MPInt &lhs, const MPInt &rhs);
namespace detail {
// Division overflows only when trying to negate the minimal signed value.
LLVM_ATTRIBUTE_ALWAYS_INLINE bool divWouldOverflow(int64_t x, int64_t y) {
return x == std::numeric_limits<int64_t>::min() && y == -1;
}
} // namespace detail
/// We define the operations here in the header to facilitate inlining.
/// ---------------------------------------------------------------------------
/// Comparison operators.
/// ---------------------------------------------------------------------------
LLVM_ATTRIBUTE_ALWAYS_INLINE bool MPInt::operator==(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall()))
return getSmall() == o.getSmall();
return detail::SlowMPInt(*this) == detail::SlowMPInt(o);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool MPInt::operator!=(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall()))
return getSmall() != o.getSmall();
return detail::SlowMPInt(*this) != detail::SlowMPInt(o);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool MPInt::operator>(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall()))
return getSmall() > o.getSmall();
return detail::SlowMPInt(*this) > detail::SlowMPInt(o);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool MPInt::operator<(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall()))
return getSmall() < o.getSmall();
return detail::SlowMPInt(*this) < detail::SlowMPInt(o);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool MPInt::operator<=(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall()))
return getSmall() <= o.getSmall();
return detail::SlowMPInt(*this) <= detail::SlowMPInt(o);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool MPInt::operator>=(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall()))
return getSmall() >= o.getSmall();
return detail::SlowMPInt(*this) >= detail::SlowMPInt(o);
}
/// ---------------------------------------------------------------------------
/// Arithmetic operators.
/// ---------------------------------------------------------------------------
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt MPInt::operator+(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall())) {
MPInt result;
bool overflow =
detail::addOverflow(getSmall(), o.getSmall(), result.getSmall());
if (LLVM_LIKELY(!overflow))
return result;
return MPInt(detail::SlowMPInt(*this) + detail::SlowMPInt(o));
}
return MPInt(detail::SlowMPInt(*this) + detail::SlowMPInt(o));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt MPInt::operator-(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall())) {
MPInt result;
bool overflow =
detail::subOverflow(getSmall(), o.getSmall(), result.getSmall());
if (LLVM_LIKELY(!overflow))
return result;
return MPInt(detail::SlowMPInt(*this) - detail::SlowMPInt(o));
}
return MPInt(detail::SlowMPInt(*this) - detail::SlowMPInt(o));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt MPInt::operator*(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall())) {
MPInt result;
bool overflow =
detail::mulOverflow(getSmall(), o.getSmall(), result.getSmall());
if (LLVM_LIKELY(!overflow))
return result;
return MPInt(detail::SlowMPInt(*this) * detail::SlowMPInt(o));
}
return MPInt(detail::SlowMPInt(*this) * detail::SlowMPInt(o));
}
// Division overflows only occur when negating the minimal possible value.
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt MPInt::divByPositive(const MPInt &o) const {
assert(o > 0);
if (LLVM_LIKELY(isSmall() && o.isSmall()))
return MPInt(getSmall() / o.getSmall());
return MPInt(detail::SlowMPInt(*this) / detail::SlowMPInt(o));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt MPInt::operator/(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall())) {
// Division overflows only occur when negating the minimal possible value.
if (LLVM_UNLIKELY(detail::divWouldOverflow(getSmall(), o.getSmall())))
return -*this;
return MPInt(getSmall() / o.getSmall());
}
return MPInt(detail::SlowMPInt(*this) / detail::SlowMPInt(o));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt abs(const MPInt &x) {
return MPInt(x >= 0 ? x : -x);
}
// Division overflows only occur when negating the minimal possible value.
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt ceilDiv(const MPInt &lhs, const MPInt &rhs) {
if (LLVM_LIKELY(lhs.isSmall() && rhs.isSmall())) {
if (LLVM_UNLIKELY(detail::divWouldOverflow(lhs.getSmall(), rhs.getSmall())))
return -lhs;
}
return MPInt(ceilDiv(detail::SlowMPInt(lhs), detail::SlowMPInt(rhs)));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt floorDiv(const MPInt &lhs,
const MPInt &rhs) {
if (LLVM_LIKELY(lhs.isSmall() && rhs.isSmall())) {
if (LLVM_UNLIKELY(detail::divWouldOverflow(lhs.getSmall(), rhs.getSmall())))
return -lhs;
return MPInt(mlir::floorDiv(lhs.getSmall(), rhs.getSmall()));
}
return MPInt(floorDiv(detail::SlowMPInt(lhs), detail::SlowMPInt(rhs)));
}
// The RHS is always expected to be positive, and the result
/// is always non-negative.
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt mod(const MPInt &lhs, const MPInt &rhs) {
if (LLVM_LIKELY(lhs.isSmall() && rhs.isSmall()))
return MPInt(mlir::mod(lhs.getSmall(), rhs.getSmall()));
return MPInt(mod(detail::SlowMPInt(lhs), detail::SlowMPInt(rhs)));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt gcd(const MPInt &a, const MPInt &b) {
if (LLVM_LIKELY(a.isSmall() && b.isSmall()))
return MPInt(llvm::greatestCommonDivisor(a.getSmall(), b.getSmall()));
return MPInt(gcd(detail::SlowMPInt(a), detail::SlowMPInt(b)));
}
/// Returns the least common multiple of 'a' and 'b'.
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt lcm(const MPInt &a, const MPInt &b) {
MPInt x = abs(a);
MPInt y = abs(b);
return (x * y) / gcd(x, y);
}
/// This operation cannot overflow.
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt MPInt::operator%(const MPInt &o) const {
if (LLVM_LIKELY(isSmall() && o.isSmall()))
return MPInt(getSmall() % o.getSmall());
return MPInt(detail::SlowMPInt(*this) % detail::SlowMPInt(o));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt MPInt::operator-() const {
if (LLVM_LIKELY(isSmall())) {
if (LLVM_LIKELY(getSmall() != std::numeric_limits<int64_t>::min()))
return MPInt(-getSmall());
return MPInt(-detail::SlowMPInt(*this));
}
return MPInt(-detail::SlowMPInt(*this));
}
/// ---------------------------------------------------------------------------
/// Assignment operators, preincrement, predecrement.
/// ---------------------------------------------------------------------------
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &MPInt::operator+=(const MPInt &o) {
if (LLVM_LIKELY(isSmall() && o.isSmall())) {
int64_t result = getSmall();
bool overflow = detail::addOverflow(getSmall(), o.getSmall(), result);
if (LLVM_LIKELY(!overflow)) {
getSmall() = result;
return *this;
}
// Note: this return is not strictly required but
// removing it leads to a performance regression.
return *this = MPInt(detail::SlowMPInt(*this) + detail::SlowMPInt(o));
}
return *this = MPInt(detail::SlowMPInt(*this) + detail::SlowMPInt(o));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &MPInt::operator-=(const MPInt &o) {
if (LLVM_LIKELY(isSmall() && o.isSmall())) {
int64_t result = getSmall();
bool overflow = detail::subOverflow(getSmall(), o.getSmall(), result);
if (LLVM_LIKELY(!overflow)) {
getSmall() = result;
return *this;
}
// Note: this return is not strictly required but
// removing it leads to a performance regression.
return *this = MPInt(detail::SlowMPInt(*this) - detail::SlowMPInt(o));
}
return *this = MPInt(detail::SlowMPInt(*this) - detail::SlowMPInt(o));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &MPInt::operator*=(const MPInt &o) {
if (LLVM_LIKELY(isSmall() && o.isSmall())) {
int64_t result = getSmall();
bool overflow = detail::mulOverflow(getSmall(), o.getSmall(), result);
if (LLVM_LIKELY(!overflow)) {
getSmall() = result;
return *this;
}
// Note: this return is not strictly required but
// removing it leads to a performance regression.
return *this = MPInt(detail::SlowMPInt(*this) * detail::SlowMPInt(o));
}
return *this = MPInt(detail::SlowMPInt(*this) * detail::SlowMPInt(o));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &MPInt::operator/=(const MPInt &o) {
if (LLVM_LIKELY(isSmall() && o.isSmall())) {
// Division overflows only occur when negating the minimal possible value.
if (LLVM_UNLIKELY(detail::divWouldOverflow(getSmall(), o.getSmall())))
return *this = -*this;
getSmall() /= o.getSmall();
return *this;
}
return *this = MPInt(detail::SlowMPInt(*this) / detail::SlowMPInt(o));
}
// Division overflows only occur when the divisor is -1.
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &
MPInt::divByPositiveInPlace(const MPInt &o) {
assert(o > 0);
if (LLVM_LIKELY(isSmall() && o.isSmall())) {
getSmall() /= o.getSmall();
return *this;
}
return *this = MPInt(detail::SlowMPInt(*this) / detail::SlowMPInt(o));
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &MPInt::operator%=(const MPInt &o) {
return *this = *this % o;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &MPInt::operator++() { return *this += 1; }
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &MPInt::operator--() { return *this -= 1; }
/// ----------------------------------------------------------------------------
/// Convenience operator overloads for int64_t.
/// ----------------------------------------------------------------------------
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &operator+=(MPInt &a, int64_t b) {
return a = a + b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &operator-=(MPInt &a, int64_t b) {
return a = a - b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &operator*=(MPInt &a, int64_t b) {
return a = a * b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &operator/=(MPInt &a, int64_t b) {
return a = a / b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt &operator%=(MPInt &a, int64_t b) {
return a = a % b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt operator+(const MPInt &a, int64_t b) {
return a + MPInt(b);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt operator-(const MPInt &a, int64_t b) {
return a - MPInt(b);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt operator*(const MPInt &a, int64_t b) {
return a * MPInt(b);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt operator/(const MPInt &a, int64_t b) {
return a / MPInt(b);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt operator%(const MPInt &a, int64_t b) {
return a % MPInt(b);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt operator+(int64_t a, const MPInt &b) {
return MPInt(a) + b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt operator-(int64_t a, const MPInt &b) {
return MPInt(a) - b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt operator*(int64_t a, const MPInt &b) {
return MPInt(a) * b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt operator/(int64_t a, const MPInt &b) {
return MPInt(a) / b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE MPInt operator%(int64_t a, const MPInt &b) {
return MPInt(a) % b;
}
/// We provide special implementations of the comparison operators rather than
/// calling through as above, as this would result in a 1.2x slowdown.
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator==(const MPInt &a, int64_t b) {
if (LLVM_LIKELY(a.isSmall()))
return a.getSmall() == b;
return a.getLarge() == b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator!=(const MPInt &a, int64_t b) {
if (LLVM_LIKELY(a.isSmall()))
return a.getSmall() != b;
return a.getLarge() != b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator>(const MPInt &a, int64_t b) {
if (LLVM_LIKELY(a.isSmall()))
return a.getSmall() > b;
return a.getLarge() > b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator<(const MPInt &a, int64_t b) {
if (LLVM_LIKELY(a.isSmall()))
return a.getSmall() < b;
return a.getLarge() < b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator<=(const MPInt &a, int64_t b) {
if (LLVM_LIKELY(a.isSmall()))
return a.getSmall() <= b;
return a.getLarge() <= b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator>=(const MPInt &a, int64_t b) {
if (LLVM_LIKELY(a.isSmall()))
return a.getSmall() >= b;
return a.getLarge() >= b;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator==(int64_t a, const MPInt &b) {
if (LLVM_LIKELY(b.isSmall()))
return a == b.getSmall();
return a == b.getLarge();
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator!=(int64_t a, const MPInt &b) {
if (LLVM_LIKELY(b.isSmall()))
return a != b.getSmall();
return a != b.getLarge();
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator>(int64_t a, const MPInt &b) {
if (LLVM_LIKELY(b.isSmall()))
return a > b.getSmall();
return a > b.getLarge();
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator<(int64_t a, const MPInt &b) {
if (LLVM_LIKELY(b.isSmall()))
return a < b.getSmall();
return a < b.getLarge();
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator<=(int64_t a, const MPInt &b) {
if (LLVM_LIKELY(b.isSmall()))
return a <= b.getSmall();
return a <= b.getLarge();
}
LLVM_ATTRIBUTE_ALWAYS_INLINE bool operator>=(int64_t a, const MPInt &b) {
if (LLVM_LIKELY(b.isSmall()))
return a >= b.getSmall();
return a >= b.getLarge();
}
} // namespace presburger
} // namespace mlir
#endif // MLIR_ANALYSIS_PRESBURGER_MPINT_H

1
mlir/lib/Analysis/Presburger/CMakeLists.txt
View File

@ -2,7 +2,6 @@ add_mlir_library(MLIRPresburger
IntegerRelation.cpp
LinearTransform.cpp
Matrix.cpp
MPInt.cpp
PresburgerRelation.cpp
PresburgerSpace.cpp
PWMAFunction.cpp

36
mlir/lib/Analysis/Presburger/MPInt.cpp
View File

@ -1,36 +0,0 @@
//===- MPInt.cpp - MLIR MPInt Class ---------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "mlir/Analysis/Presburger/MPInt.h"
#include "llvm/Support/MathExtras.h"
using namespace mlir;
using namespace presburger;
llvm::hash_code mlir::presburger::hash_value(const MPInt &x) {
if (x.isSmall())
return llvm::hash_value(x.valSmall);
return detail::hash_value(x.valLarge);
}
/// ---------------------------------------------------------------------------
/// Printing.
/// ---------------------------------------------------------------------------
llvm::raw_ostream &MPInt::print(llvm::raw_ostream &os) const {
if (isSmall())
return os << valSmall;
return os << valLarge;
}
void MPInt::dump() const { print(llvm::errs()); }
llvm::raw_ostream &mlir::presburger::operator<<(llvm::raw_ostream &os,
const MPInt &x) {
x.print(os);
return os;
}

2
mlir/unittests/Analysis/Presburger/CMakeLists.txt
View File

@ -3,11 +3,11 @@ add_mlir_unittest(MLIRPresburgerTests
IntegerRelationTest.cpp
LinearTransformTest.cpp
MatrixTest.cpp
MPIntTest.cpp
PresburgerSetTest.cpp
PresburgerSpaceTest.cpp
PWMAFunctionTest.cpp
SimplexTest.cpp
SlowMPIntTest.cpp
../../Dialect/Affine/Analysis/AffineStructuresParser.cpp
)

63
mlir/unittests/Analysis/Presburger/MPIntTest.cpp → mlir/unittests/Analysis/Presburger/SlowMPIntTest.cpp
View File

@ -1,4 +1,4 @@
//===- MPIntTest.cpp - Tests for MPInt ------------------------------------===//
//===- SlowMPIntTest.cpp - Tests for SlowMPInt ----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@ -6,33 +6,16 @@
//
//===----------------------------------------------------------------------===//
#include "mlir/Analysis/Presburger/MPInt.h"
#include "mlir/Analysis/Presburger/SlowMPInt.h"
#include <gmock/gmock.h>
#include <gtest/gtest.h>
using namespace mlir;
using namespace presburger;
using detail::SlowMPInt;
// googletest boilerplate to run the same tests with both MPInt and SlowMPInt.
template <typename>
class IntTest : public testing::Test {};
using TypeList = testing::Types<MPInt, detail::SlowMPInt>;
// This is for pretty-printing the test name with the name of the class in use.
class TypeNames {
public:
template <typename T>
static std::string GetName(int) { // NOLINT; gtest mandates this name.
if (std::is_same<T, MPInt>())
return "MPInt";
if (std::is_same<T, detail::SlowMPInt>())
return "SlowMPInt";
}
};
TYPED_TEST_SUITE(IntTest, TypeList, TypeNames);
TYPED_TEST(IntTest, ops) {
TypeParam two(2), five(5), seven(7), ten(10);
TEST(SlowMPIntTest, ops) {
SlowMPInt two(2), five(5), seven(7), ten(10);
EXPECT_EQ(five + five, ten);
EXPECT_EQ(five * five, 2 * ten + five);
EXPECT_EQ(five * five, 3 * ten - five);
@ -50,7 +33,7 @@ TYPED_TEST(IntTest, ops) {
EXPECT_EQ(-ten / -seven, -10 / -7);
EXPECT_EQ(ten / seven, 10 / 7);
TypeParam x = ten;
SlowMPInt x = ten;
x += five;
EXPECT_EQ(x, 15);
x *= two;
@ -74,8 +57,8 @@ TYPED_TEST(IntTest, ops) {
EXPECT_GT(ten, five);
}
TYPED_TEST(IntTest, ops64Overloads) {
TypeParam two(2), five(5), seven(7), ten(10);
TEST(SlowMPIntTest, ops64Overloads) {
SlowMPInt two(2), five(5), seven(7), ten(10);
EXPECT_EQ(five + 5, ten);
EXPECT_EQ(five + 5, 5 + five);
EXPECT_EQ(five * 5, 2 * ten + 5);
@ -87,7 +70,7 @@ TYPED_TEST(IntTest, ops64Overloads) {
EXPECT_EQ(2 - two, 0);
EXPECT_EQ(2 % two, two % 2);
TypeParam x = ten;
SlowMPInt x = ten;
x += 5;
EXPECT_EQ(x, 15);
x *= 2;
@ -120,34 +103,10 @@ TYPED_TEST(IntTest, ops64Overloads) {
EXPECT_GT(10, five);
}
TYPED_TEST(IntTest, overflows) {
TypeParam x(1ll << 60);
TEST(SlowMPIntTest, overflows) {
SlowMPInt x(1ll << 60);
EXPECT_EQ((x * x - x * x * x * x) / (x * x * x), 1 - (1ll << 60));
TypeParam y(1ll << 62);
SlowMPInt y(1ll << 62);
EXPECT_EQ((y + y + y + y + y + y) / y, 6);
EXPECT_EQ(-(2 * (-y)), 2 * y); // -(-2^63) overflow.
x *= x;
EXPECT_EQ(x, (y * y) / 16);
y += y;
y += y;
y += y;
y /= 8;
EXPECT_EQ(y, 1ll << 62);
int64_t min = std::numeric_limits<int64_t>::min();
int64_t max = std::numeric_limits<int64_t>::max();
TypeParam z(min);
z /= -1;
EXPECT_EQ(z, -TypeParam(min));
TypeParam w(min);
--w;
EXPECT_EQ(w, TypeParam(min) - 1);
TypeParam u(min);
u -= 1;
EXPECT_EQ(u, w);
TypeParam v(max);
++v;
EXPECT_EQ(v, TypeParam(max) + 1);
TypeParam t(max);
t += 1;
EXPECT_EQ(t, v);
}