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// RUN: mlir-opt -allow-unregistered-dialect %s -pass-pipeline='builtin.func(scf-parallel-loop-collapsing{collapsed-indices-0=0,1}, canonicalize)' | FileCheck %s
func @collapse_to_single() {
%c0 = arith.constant 3 : index
%c1 = arith.constant 7 : index
%c2 = arith.constant 11 : index
%c3 = arith.constant 29 : index
%c4 = arith.constant 3 : index
%c5 = arith.constant 4 : index
scf.parallel (%i0, %i1) = (%c0, %c1) to (%c2, %c3) step (%c4, %c5) {
%result = "magic.op"(%i0, %i1): (index, index) -> index
}
return
}
// CHECK-LABEL: func @collapse_to_single() {
// CHECK-DAG: [[C18:%.*]] = arith.constant 18 : index
// CHECK-DAG: [[C6:%.*]] = arith.constant 6 : index
// CHECK-DAG: [[C3:%.*]] = arith.constant 3 : index
// CHECK-DAG: [[C7:%.*]] = arith.constant 7 : index
// CHECK-DAG: [[C4:%.*]] = arith.constant 4 : index
// CHECK-DAG: [[C1:%.*]] = arith.constant 1 : index
// CHECK-DAG: [[C0:%.*]] = arith.constant 0 : index
// CHECK: scf.parallel ([[NEW_I:%.*]]) = ([[C0]]) to ([[C18]]) step ([[C1]]) {
// CHECK: [[I0_COUNT:%.*]] = arith.remsi [[NEW_I]], [[C6]] : index
// CHECK: [[I1_COUNT:%.*]] = arith.divsi [[NEW_I]], [[C6]] : index
// CHECK: [[V0:%.*]] = arith.muli [[I0_COUNT]], [[C4]] : index
// CHECK: [[I1:%.*]] = arith.addi [[V0]], [[C7]] : index
// CHECK: [[V1:%.*]] = arith.muli [[I1_COUNT]], [[C3]] : index
// CHECK: [[I0:%.*]] = arith.addi [[V1]], [[C3]] : index
// CHECK: "magic.op"([[I0]], [[I1]]) : (index, index) -> index
// CHECK: scf.yield
// CHECK-NEXT: }
// CHECK-NEXT: return
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