1// RUN: mlir-opt %s --test-loop-unrolling="unroll-factor=3" -split-input-file -canonicalize | FileCheck %s 2// RUN: mlir-opt %s --test-loop-unrolling="unroll-factor=1" -split-input-file -canonicalize | FileCheck %s --check-prefix UNROLL-BY-1 3 4// CHECK-LABEL: scf_loop_unroll_single 5func.func @scf_loop_unroll_single(%arg0 : f32, %arg1 : f32) -> f32 { 6 %from = arith.constant 0 : index 7 %to = arith.constant 10 : index 8 %step = arith.constant 1 : index 9 %sum = scf.for %iv = %from to %to step %step iter_args(%sum_iter = %arg0) -> (f32) { 10 %next = arith.addf %sum_iter, %arg1 : f32 11 scf.yield %next : f32 12 } 13 // CHECK: %[[SUM:.*]] = scf.for %{{.*}} = %{{.*}} to %{{.*}} step %{{.*}} iter_args(%[[V0:.*]] = 14 // CHECK-NEXT: %[[V1:.*]] = arith.addf %[[V0]] 15 // CHECK-NEXT: %[[V2:.*]] = arith.addf %[[V1]] 16 // CHECK-NEXT: %[[V3:.*]] = arith.addf %[[V2]] 17 // CHECK-NEXT: scf.yield %[[V3]] 18 // CHECK-NEXT: } 19 // CHECK-NEXT: %[[RES:.*]] = arith.addf %[[SUM]], 20 // CHECK-NEXT: return %[[RES]] 21 return %sum : f32 22} 23 24// CHECK-LABEL: scf_loop_unroll_double_symbolic_ub 25// CHECK-SAME: (%{{.*}}: f32, %{{.*}}: f32, %[[N:.*]]: index) 26func.func @scf_loop_unroll_double_symbolic_ub(%arg0 : f32, %arg1 : f32, %n : index) -> (f32,f32) { 27 %from = arith.constant 0 : index 28 %step = arith.constant 1 : index 29 %sum:2 = scf.for %iv = %from to %n step %step iter_args(%i0 = %arg0, %i1 = %arg1) -> (f32, f32) { 30 %sum0 = arith.addf %i0, %arg0 : f32 31 %sum1 = arith.addf %i1, %arg1 : f32 32 scf.yield %sum0, %sum1 : f32, f32 33 } 34 return %sum#0, %sum#1 : f32, f32 35 // CHECK-DAG: %[[C0:.*]] = arith.constant 0 : index 36 // CHECK-DAG: %[[C1:.*]] = arith.constant 1 : index 37 // CHECK-DAG: %[[C3:.*]] = arith.constant 3 : index 38 // CHECK-NEXT: %[[REM:.*]] = arith.remsi %[[N]], %[[C3]] 39 // CHECK-NEXT: %[[UB:.*]] = arith.subi %[[N]], %[[REM]] 40 // CHECK-NEXT: %[[SUM:.*]]:2 = scf.for {{.*}} = %[[C0]] to %[[UB]] step %[[C3]] iter_args 41 // CHECK: } 42 // CHECK-NEXT: %[[SUM1:.*]]:2 = scf.for {{.*}} = %[[UB]] to %[[N]] step %[[C1]] iter_args(%[[V1:.*]] = %[[SUM]]#0, %[[V2:.*]] = %[[SUM]]#1) 43 // CHECK: } 44 // CHECK-NEXT: return %[[SUM1]]#0, %[[SUM1]]#1 45} 46 47// UNROLL-BY-1-LABEL: scf_loop_unroll_factor_1_promote 48func.func @scf_loop_unroll_factor_1_promote() -> () { 49 %step = arith.constant 1 : index 50 %lo = arith.constant 0 : index 51 %hi = arith.constant 1 : index 52 scf.for %i = %lo to %hi step %step { 53 %x = "test.foo"(%i) : (index) -> i32 54 } 55 return 56 // UNROLL-BY-1-NEXT: %[[C0:.*]] = arith.constant 0 : index 57 // UNROLL-BY-1-NEXT: %{{.*}} = "test.foo"(%[[C0]]) : (index) -> i32 58} 59