derek.holloway
7502bf64a4
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50 lines
1.5 KiB
MLIR
50 lines
1.5 KiB
MLIR
// RUN: mlir-opt %s -split-input-file -affine-loop-tile="tile-size=32" -verify-diagnostics | FileCheck %s
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// -----
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// There is no dependence violated in this case. No error should be raised.
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// CHECK-DAG: [[$LB:#map[0-9]*]] = affine_map<(d0) -> (d0)>
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// CHECK-DAG: [[$UB:#map[0-9]*]] = affine_map<(d0) -> (d0 + 32)>
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// CHECK-LABEL: func @valid_to_tile()
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func.func @valid_to_tile() {
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%0 = memref.alloc() : memref<64xf32>
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affine.for %i = 0 to 64 {
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%1 = affine.load %0[%i] : memref<64xf32>
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%2 = arith.addf %1, %1 : f32
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affine.store %2, %0[%i] : memref<64xf32>
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}
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return
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}
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// CHECK: affine.for %{{.*}} = 0 to 64 step 32 {
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// CHECK-NEXT: affine.for %{{.*}} = [[$LB]](%{{.*}}) to [[$UB]](%{{.*}}) {
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// -----
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// There are dependences along the diagonal of the 2d iteration space,
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// specifically, they are of direction (+, -).
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// The default tiling method (hyper-rect) will violate tiling legality.
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// We expect a remark that points that issue out to be emitted.
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func.func @illegal_loop_with_diag_dependence() {
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%A = memref.alloc() : memref<64x64xf32>
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// No tiling here.
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// CHECK: affine.for %{{.*}} = 0 to 64 {
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// CHECK-NEXT: affine.for %{{.*}} = 0 to 64 {
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affine.for %i = 0 to 64 {
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affine.for %j = 0 to 64 {
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%0 = affine.load %A[%j, %i] : memref<64x64xf32>
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%1 = affine.load %A[%i, %j - 1] : memref<64x64xf32>
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%2 = arith.addf %0, %1 : f32
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affine.store %2, %A[%i, %j] : memref<64x64xf32>
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}
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}
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return
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}
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