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llvm-project/mlir/test/Transforms/memref-bound-check.mlir

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// RUN: mlir-opt %s -test-memref-bound-check -split-input-file -verify-diagnostics | FileCheck %s
// -----
// CHECK-LABEL: func @test() {
func @test() {
%zero = constant 0 : index
%minusone = constant -1 : index
%sym = constant 111 : index
%A = memref.alloc() : memref<9 x 9 x i32>
%B = memref.alloc() : memref<111 x i32>
affine.for %i = -1 to 10 {
affine.for %j = -1 to 10 {
%idx0 = affine.apply affine_map<(d0, d1) -> (d0)>(%i, %j)
%idx1 = affine.apply affine_map<(d0, d1) -> (d1)>(%i, %j)
// Out of bound access.
%x = affine.load %A[%idx0, %idx1] : memref<9 x 9 x i32>
// expected-error@-1 {{'affine.load' op memref out of upper bound access along dimension #1}}
// expected-error@-2 {{'affine.load' op memref out of lower bound access along dimension #1}}
// expected-error@-3 {{'affine.load' op memref out of upper bound access along dimension #2}}
// expected-error@-4 {{'affine.load' op memref out of lower bound access along dimension #2}}
// This will access 0 to 110 - hence an overflow.
%idy = affine.apply affine_map<(d0, d1) -> (10*d0 - d1 + 19)>(%i, %j)
%y = affine.load %B[%idy] : memref<111 x i32>
}
}
affine.for %k = 0 to 10 {
// In bound.
%u = affine.load %B[%zero] : memref<111 x i32>
// Out of bounds.
%v = affine.load %B[%sym] : memref<111 x i32> // expected-error {{'affine.load' op memref out of upper bound access along dimension #1}}
// Out of bounds.
affine.store %v, %B[%minusone] : memref<111 x i32> // expected-error {{'affine.store' op memref out of lower bound access along dimension #1}}
}
return
}
// CHECK-LABEL: func @test_mod_floordiv_ceildiv
func @test_mod_floordiv_ceildiv() {
%zero = constant 0 : index
%A = memref.alloc() : memref<128 x 64 x 64 x i32>
affine.for %i = 0 to 256 {
affine.for %j = 0 to 256 {
%idx0 = affine.apply affine_map<(d0, d1, d2) -> (d0 mod 128 + 1)>(%i, %j, %j)
%idx1 = affine.apply affine_map<(d0, d1, d2) -> (d1 floordiv 4 + 1)>(%i, %j, %j)
%idx2 = affine.apply affine_map<(d0, d1, d2) -> (d2 ceildiv 4)>(%i, %j, %j)
%x = affine.load %A[%idx0, %idx1, %idx2] : memref<128 x 64 x 64 x i32>
// expected-error@-1 {{'affine.load' op memref out of upper bound access along dimension #1}}
// expected-error@-2 {{'affine.load' op memref out of upper bound access along dimension #2}}
// expected-error@-3 {{'affine.load' op memref out of upper bound access along dimension #3}}
%idy0 = affine.apply affine_map<(d0, d1, d2) -> (d0 mod 128)>(%i, %j, %j)
%idy1 = affine.apply affine_map<(d0, d1, d2) -> (d1 floordiv 4)>(%i, %j, %j)
%idy2 = affine.apply affine_map<(d0, d1, d2) -> (d2 ceildiv 4 - 1)>(%i, %j, %j)
affine.store %x, %A[%idy0, %idy1, %idy2] : memref<128 x 64 x 64 x i32> // expected-error {{'affine.store' op memref out of lower bound access along dimension #3}}
} // CHECK: }
} // CHECK: }
return
}
// CHECK-LABEL: func @test_no_out_of_bounds()
func @test_no_out_of_bounds() {
%zero = constant 0 : index
%A = memref.alloc() : memref<257 x 256 x i32>
%C = memref.alloc() : memref<257 x i32>
%B = memref.alloc() : memref<1 x i32>
affine.for %i = 0 to 256 {
affine.for %j = 0 to 256 {
// All of these accesses are in bound; check that no errors are emitted.
// CHECK: %{{.*}} = affine.apply {{#map.*}}(%{{.*}}, %{{.*}})
// CHECK-NEXT: %{{.*}} = affine.load %{{.*}}[%{{.*}}, %{{.*}}] : memref<257x256xi32>
// CHECK-NEXT: %{{.*}} = affine.apply {{#map.*}}(%{{.*}}, %{{.*}})
// CHECK-NEXT: %{{.*}} = affine.load %{{.*}}[%{{.*}}] : memref<1xi32>
%idx0 = affine.apply affine_map<(d0, d1) -> ( 64 * (d0 ceildiv 64))>(%i, %j)
// Without GCDTightenInequalities(), the upper bound on the region
// accessed along first memref dimension would have come out as d0 <= 318
// (instead of d0 <= 256), and led to a false positive out of bounds.
%x = affine.load %A[%idx0, %zero] : memref<257 x 256 x i32>
%idy = affine.apply affine_map<(d0, d1) -> (d0 floordiv 256)>(%i, %i)
%y = affine.load %B[%idy] : memref<1 x i32>
} // CHECK-NEXT: }
}
return
}
// CHECK-LABEL: func @mod_div
func @mod_div() {
%zero = constant 0 : index
%A = memref.alloc() : memref<128 x 64 x 64 x i32>
affine.for %i = 0 to 256 {
affine.for %j = 0 to 256 {
%idx0 = affine.apply affine_map<(d0, d1, d2) -> (d0 mod 128 + 1)>(%i, %j, %j)
%idx1 = affine.apply affine_map<(d0, d1, d2) -> (d1 floordiv 4 + 1)>(%i, %j, %j)
%idx2 = affine.apply affine_map<(d0, d1, d2) -> (d2 ceildiv 4)>(%i, %j, %j)
%x = affine.load %A[%idx0, %idx1, %idx2] : memref<128 x 64 x 64 x i32>
// expected-error@-1 {{'affine.load' op memref out of upper bound access along dimension #1}}
// expected-error@-2 {{'affine.load' op memref out of upper bound access along dimension #2}}
// expected-error@-3 {{'affine.load' op memref out of upper bound access along dimension #3}}
%idy0 = affine.apply affine_map<(d0, d1, d2) -> (d0 mod 128)>(%i, %j, %j)
%idy1 = affine.apply affine_map<(d0, d1, d2) -> (d1 floordiv 4)>(%i, %j, %j)
%idy2 = affine.apply affine_map<(d0, d1, d2) -> (d2 ceildiv 4 - 1)>(%i, %j, %j)
affine.store %x, %A[%idy0, %idy1, %idy2] : memref<128 x 64 x 64 x i32> // expected-error {{'affine.store' op memref out of lower bound access along dimension #3}}
}
}
return
}
// Tests with nested mod's and floordiv's.
// CHECK-LABEL: func @mod_floordiv_nested() {
func @mod_floordiv_nested() {
%A = memref.alloc() : memref<256 x 256 x i32>
affine.for %i = 0 to 256 {
affine.for %j = 0 to 256 {
%idx0 = affine.apply affine_map<(d0, d1) -> ((d0 mod 1024) floordiv 4)>(%i, %j)
%idx1 = affine.apply affine_map<(d0, d1) -> ((((d1 mod 128) mod 32) ceildiv 4) * 32)>(%i, %j)
affine.load %A[%idx0, %idx1] : memref<256 x 256 x i32> // expected-error {{'affine.load' op memref out of upper bound access along dimension #2}}
}
}
return
}
// CHECK-LABEL: func @test_semi_affine_bailout
func @test_semi_affine_bailout(%N : index) {
%B = memref.alloc() : memref<10 x i32>
affine.for %i = 0 to 10 {
%idx = affine.apply affine_map<(d0)[s0] -> (d0 * s0)>(%i)[%N]
%y = affine.load %B[%idx] : memref<10 x i32>
// expected-error@-1 {{getMemRefRegion: compose affine map failed}}
}
return
}
// CHECK-LABEL: func @multi_mod_floordiv
func @multi_mod_floordiv() {
%A = memref.alloc() : memref<2x2xi32>
affine.for %ii = 0 to 64 {
%idx0 = affine.apply affine_map<(d0) -> ((d0 mod 147456) floordiv 1152)> (%ii)
%idx1 = affine.apply affine_map<(d0) -> (((d0 mod 147456) mod 1152) floordiv 384)> (%ii)
%v = affine.load %A[%idx0, %idx1] : memref<2x2xi32>
}
return
}
// CHECK-LABEL: func @delinearize_mod_floordiv
func @delinearize_mod_floordiv() {
%c0 = constant 0 : index
%in = memref.alloc() : memref<2x2x3x3x16x1xi32>
%out = memref.alloc() : memref<64x9xi32>
// Reshape '%in' into '%out'.
affine.for %ii = 0 to 64 {
affine.for %jj = 0 to 9 {
%a0 = affine.apply affine_map<(d0, d1) -> (d0 * (9 * 1024) + d1 * 128)> (%ii, %jj)
%a10 = affine.apply affine_map<(d0) ->
(d0 floordiv (2 * 3 * 3 * 128 * 128))> (%a0)
%a11 = affine.apply affine_map<(d0) ->
((d0 mod 294912) floordiv (3 * 3 * 128 * 128))> (%a0)
%a12 = affine.apply affine_map<(d0) ->
((((d0 mod 294912) mod 147456) floordiv 1152) floordiv 8)> (%a0)
%a13 = affine.apply affine_map<(d0) ->
((((d0 mod 294912) mod 147456) mod 1152) floordiv 384)> (%a0)
%a14 = affine.apply affine_map<(d0) ->
(((((d0 mod 294912) mod 147456) mod 1152) mod 384) floordiv 128)> (%a0)
%a15 = affine.apply affine_map<(d0) ->
((((((d0 mod 294912) mod 147456) mod 1152) mod 384) mod 128)
floordiv 128)> (%a0)
%v0 = affine.load %in[%a10, %a11, %a13, %a14, %a12, %a15]
: memref<2x2x3x3x16x1xi32>
}
}
return
}
// CHECK-LABEL: func @zero_d_memref
func @zero_d_memref(%arg0: memref<i32>) {
%c0 = constant 0 : i32
// A 0-d memref always has in-bound accesses!
affine.store %c0, %arg0[] : memref<i32>
return
}
// CHECK-LABEL: func @out_of_bounds
func @out_of_bounds() {
%in = memref.alloc() : memref<1xi32>
%c9 = constant 9 : i32
affine.for %i0 = 10 to 11 {
%idy = affine.apply affine_map<(d0) -> (100 * d0 floordiv 1000)> (%i0)
affine.store %c9, %in[%idy] : memref<1xi32> // expected-error {{'affine.store' op memref out of upper bound access along dimension #1}}
}
return
}
// -----
// This test case accesses within bounds. Without removal of a certain type of
// trivially redundant constraints (those differing only in their constant
// term), the number of constraints here explodes, and this would return out of
// bounds errors conservatively due to FlatAffineConstraints::kExplosionFactor.
#map3 = affine_map<(d0, d1) -> ((d0 * 72 + d1) floordiv 2304 + ((((d0 * 72 + d1) mod 2304) mod 1152) mod 9) floordiv 3)>
#map4 = affine_map<(d0, d1) -> ((d0 * 72 + d1) mod 2304 - (((d0 * 72 + d1) mod 2304) floordiv 1152) * 1151 - ((((d0 * 72 + d1) mod 2304) mod 1152) floordiv 9) * 9 - (((((d0 * 72 + d1) mod 2304) mod 1152) mod 9) floordiv 3) * 3)>
#map5 = affine_map<(d0, d1) -> (((((d0 * 72 + d1) mod 2304) mod 1152) floordiv 9) floordiv 8)>
// CHECK-LABEL: func @test_complex_mod_floordiv
func @test_complex_mod_floordiv(%arg0: memref<4x4x16x1xf32>) {
%c0 = constant 0 : index
%0 = memref.alloc() : memref<1x2x3x3x16x1xf32>
affine.for %i0 = 0 to 64 {
affine.for %i1 = 0 to 9 {
%2 = affine.apply #map3(%i0, %i1)
%3 = affine.apply #map4(%i0, %i1)
%4 = affine.apply #map5(%i0, %i1)
%5 = affine.load %arg0[%2, %c0, %4, %c0] : memref<4x4x16x1xf32>
}
}
return
}
// -----
// The first load is within bounds, but not the second one.
#map0 = affine_map<(d0) -> (d0 mod 4)>
#map1 = affine_map<(d0) -> (d0 mod 4 + 4)>
// CHECK-LABEL: func @test_mod_bound
func @test_mod_bound() {
%0 = memref.alloc() : memref<7 x f32>
%1 = memref.alloc() : memref<6 x f32>
affine.for %i0 = 0 to 4096 {
affine.for %i1 = #map0(%i0) to #map1(%i0) {
affine.load %0[%i1] : memref<7 x f32>
affine.load %1[%i1] : memref<6 x f32>
// expected-error@-1 {{'affine.load' op memref out of upper bound access along dimension #1}}
}
}
return
}
// -----
#map0 = affine_map<(d0) -> (d0 floordiv 4)>
#map1 = affine_map<(d0) -> (d0 floordiv 4 + 4)>
#map2 = affine_map<(d0) -> (4 * (d0 floordiv 4) + d0 mod 4)>
// CHECK-LABEL: func @test_floordiv_bound
func @test_floordiv_bound() {
%0 = memref.alloc() : memref<1027 x f32>
%1 = memref.alloc() : memref<1026 x f32>
%2 = memref.alloc() : memref<4096 x f32>
%N = constant 2048 : index
affine.for %i0 = 0 to 4096 {
affine.for %i1 = #map0(%i0) to #map1(%i0) {
affine.load %0[%i1] : memref<1027 x f32>
affine.load %1[%i1] : memref<1026 x f32>
// expected-error@-1 {{'affine.load' op memref out of upper bound access along dimension #1}}
}
affine.for %i2 = 0 to #map2(%N) {
// Within bounds.
%v = affine.load %2[%i2] : memref<4096 x f32>
}
}
return
}
// -----
// This should not give an out of bounds error. The result of the affine.apply
// is composed into the bound map during analysis.
#map_lb = affine_map<(d0) -> (d0)>
#map_ub = affine_map<(d0) -> (d0 + 4)>
// CHECK-LABEL: func @non_composed_bound_operand
func @non_composed_bound_operand(%arg0: memref<1024xf32>) {
affine.for %i0 = 4 to 1028 step 4 {
%i1 = affine.apply affine_map<(d0) -> (d0 - 4)> (%i0)
affine.for %i2 = #map_lb(%i1) to #map_ub(%i1) {
%0 = affine.load %arg0[%i2] : memref<1024xf32>
}
}
return
}
// CHECK-LABEL: func @zero_d_memref
func @zero_d_memref() {
%Z = memref.alloc() : memref<f32>
affine.for %i = 0 to 100 {
affine.load %Z[] : memref<f32>
}
return
}
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