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[mlir] Add a test exercising partial constant folding of affine min/max 

This functionality was introduced in a87db48e6f
but only only tested indirectly though Linalg tests. Add direct tests.
This commit is contained in:
Alex Zinenko 2020-05-07 12:39:12 +02:00
parent 4809580463
commit 54c927b988
1 changed files with 62 additions and 0 deletions
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mlir/test/Dialect/Affine/constant-fold.mlir Normal file
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// RUN: mlir-opt -test-constant-fold -split-input-file %s | FileCheck %s
// CHECK-LABEL: func @affine_apply
func @affine_apply(%variable : index) -> (index, index, index) {
%c177 = constant 177 : index
%c211 = constant 211 : index
%N = constant 1075 : index
// CHECK:[[C1159:%.+]] = constant 1159 : index
// CHECK:[[C1152:%.+]] = constant 1152 : index
%x0 = affine.apply affine_map<(d0, d1)[S0] -> ( (d0 + 128 * S0) floordiv 128 + d1 mod 128)>
(%c177, %c211)[%N]
%x1 = affine.apply affine_map<(d0, d1)[S0] -> (128 * (S0 ceildiv 128))>
(%c177, %c211)[%N]
// CHECK:[[C42:%.+]] = constant 42 : index
%y = affine.apply affine_map<(d0) -> (42)> (%variable)
// CHECK: return [[C1159]], [[C1152]], [[C42]]
return %x0, %x1, %y : index, index, index
}
// -----
// CHECK: #[[map:.*]] = affine_map<(d0, d1) -> (42, d1)
func @affine_min(%variable: index) -> (index, index) {
// CHECK: %[[C42:.*]] = constant 42
%c42 = constant 42 : index
%c44 = constant 44 : index
// Partial folding will use a different map.
// CHECK: %[[r:.*]] = affine.min #[[map]](%[[C42]], %{{.*}})
%0 = affine.min affine_map<(d0, d1) -> (d0, d1)>(%c42, %variable)
// Full folding will remove the operation entirely.
// CHECK-NOT: affine.min
%1 = affine.min affine_map<(d0, d1) -> (d0, d1)>(%c42, %c44)
// CHECK: return %[[r]], %[[C42]]
return %0, %1 : index, index
}
// -----
// CHECK: #[[map:.*]] = affine_map<(d0, d1) -> (42, d1)
func @affine_min(%variable: index) -> (index, index) {
// CHECK: %[[C42:.*]] = constant 42
%c42 = constant 42 : index
// CHECK: %[[C44:.*]] = constant 44
%c44 = constant 44 : index
// Partial folding will use a different map.
// CHECK: %[[r:.*]] = affine.max #[[map]](%[[C42]], %{{.*}})
%0 = affine.max affine_map<(d0, d1) -> (d0, d1)>(%c42, %variable)
// Full folding will remove the operation entirely.
// CHECK-NOT: affine.max
%1 = affine.max affine_map<(d0, d1) -> (d0, d1)>(%c42, %c44)
// CHECK: return %[[r]], %[[C44]]
return %0, %1 : index, index
}