llvm-project/mlir/unittests/IR/AffineMapTest.cpp

123 lines
4.2 KiB
C++

//===- AffineMapTest.cpp - unit tests for affine map API ------------------===//
//
// 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/IR/AffineMap.h"
#include "mlir/IR/Builders.h"
#include "gtest/gtest.h"
using namespace mlir;
// Test AffineMap replace API for the zero result case.
TEST(AffineMapTest, inferMapFromAffineExprs) {
MLIRContext ctx;
OpBuilder b(&ctx);
AffineMap map = b.getEmptyAffineMap();
DenseMap<AffineExpr, AffineExpr> replacements;
map.replace(replacements);
EXPECT_EQ(map, map);
}
TEST(AffineMapTest, isProjectedPermutation) {
MLIRContext ctx;
OpBuilder b(&ctx);
// 1. Empty map
AffineMap map1 = b.getEmptyAffineMap();
EXPECT_TRUE(map1.isProjectedPermutation());
// 2. Map with a symbol
AffineMap map2 = AffineMap::get(0, 1, &ctx);
EXPECT_FALSE(map2.isProjectedPermutation());
// 3. The result map is {0} and zero results are _allowed_.
auto zero = b.getAffineConstantExpr(0);
AffineMap map3 = AffineMap::get(1, 0, {zero}, &ctx);
EXPECT_TRUE(map3.isProjectedPermutation(/*allowZeroInResults=*/true));
// 4. The result map is {0} and zero results are _not allowed_
AffineMap map4 = AffineMap::get(1, 0, {zero}, &ctx);
EXPECT_FALSE(map4.isProjectedPermutation(/*allowZeroInResults=*/false));
// 5. The number of results > inputs
AffineMap map5 = AffineMap::get(1, 0, {zero, zero}, &ctx);
EXPECT_FALSE(map5.isProjectedPermutation(/*allowZeroInResults=*/true));
// 6. A constant result that's not a {0}
auto one = b.getAffineConstantExpr(1);
AffineMap map6 = AffineMap::get(1, 0, {one}, &ctx);
EXPECT_FALSE(map6.isProjectedPermutation(/*allowZeroInResults=*/true));
// 7. Not a dim expression
auto d0 = b.getAffineDimExpr(0);
auto d1 = b.getAffineDimExpr(1);
auto sum = d0 + d1;
AffineMap map7 = AffineMap::get(2, 0, {sum}, &ctx);
EXPECT_FALSE(map7.isProjectedPermutation());
// 8. (d0, d1, d2, d3, d4, d5) ->(d5, d3, d0, d1, d2, d4)
auto d2 = b.getAffineDimExpr(2);
auto d3 = b.getAffineDimExpr(3);
auto d4 = b.getAffineDimExpr(4);
auto d5 = b.getAffineDimExpr(5);
AffineMap map8 = AffineMap::get(6, 0, {d5, d3, d0, d1, d2, d4}, &ctx);
EXPECT_TRUE(map8.isProjectedPermutation());
// 9. (d0, d1, d2, d3, d4, d5) ->(d5, d3, d0 + d1, d2, d4)
AffineMap map9 = AffineMap::get(6, 0, {d5, d3, sum, d2, d4}, &ctx);
EXPECT_FALSE(map9.isProjectedPermutation());
// 10. (d0, d1, d2, d3, d4, d5) ->(d5, d3, d2, d4)
AffineMap map10 = AffineMap::get(6, 0, {d5, d3, d2, d4}, &ctx);
EXPECT_TRUE(map10.isProjectedPermutation());
}
TEST(AffineMapTest, getInversePermutation) {
MLIRContext ctx;
OpBuilder b(&ctx);
// 0. Empty map
AffineMap map0 = AffineMap::get(0, 0, {}, &ctx);
AffineMap inverseMap0 = inversePermutation(map0);
EXPECT_TRUE(inverseMap0.isEmpty());
auto d0 = b.getAffineDimExpr(0);
auto d1 = b.getAffineDimExpr(1);
auto d2 = b.getAffineDimExpr(2);
// 1. (d0, d1, d2) -> (d1, d1, d0, d2, d1, d2, d1, d0)
AffineMap map1 = AffineMap::get(3, 0, {d1, d1, d0, d2, d1, d2, d1, d0}, &ctx);
// (d0, d1, d2, d3, d4, d5, d6, d7) -> (d2, d0, d3)
AffineMap inverseMap1 = inversePermutation(map1);
auto resultsInv1 = inverseMap1.getResults();
EXPECT_EQ(resultsInv1.size(), 3UL);
// Expect (d2, d0, d3)
SmallVector<unsigned> expected = {2, 0, 3};
for (auto [idx, res] : llvm::enumerate(resultsInv1)) {
AffineDimExpr expr = llvm::dyn_cast<AffineDimExpr>(res);
EXPECT_TRUE(expr && expr.getPosition() == expected[idx]);
}
// 2. (d0, d1, d2) -> (d1, d0 + d1, d0, d2, d1, d2, d1, d0)
auto sum = d0 + d1;
AffineMap map2 =
AffineMap::get(3, 0, {d1, sum, d0, d2, d1, d2, d1, d0}, &ctx);
// (d0, d1, d2, d3, d4, d5, d6, d7) -> (d2, d0, d3)
AffineMap inverseMap2 = inversePermutation(map2);
auto resultsInv2 = inverseMap2.getResults();
EXPECT_EQ(resultsInv2.size(), 3UL);
// Expect (d2, d0, d3)
expected = {2, 0, 3};
for (auto [idx, res] : llvm::enumerate(resultsInv2)) {
AffineDimExpr expr = llvm::dyn_cast<AffineDimExpr>(res);
EXPECT_TRUE(expr && expr.getPosition() == expected[idx]);
}
}