// RUN: mlir-opt -allow-unregistered-dialect %s -pass-pipeline='builtin.module(func.func(scf-parallel-loop-fusion))' -split-input-file | FileCheck %s
func.func @fuse_empty_loops() {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
return
}
// CHECK-LABEL: func @fuse_empty_loops
// CHECK-DAG: [[C2:%.*]] = arith.constant 2 : index
// CHECK-DAG: [[C0:%.*]] = arith.constant 0 : index
// CHECK-DAG: [[C1:%.*]] = arith.constant 1 : index
// CHECK: scf.parallel ([[I:%.*]], [[J:%.*]]) = ([[C0]], [[C0]])
// CHECK-SAME: to ([[C2]], [[C2]]) step ([[C1]], [[C1]]) {
// CHECK: scf.reduce
// CHECK: }
// CHECK-NOT: scf.parallel
// -----
func.func @fuse_ops_between(%A: f32, %B: f32) -> f32 {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
%res = arith.addf %A, %B : f32
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
return %res : f32
}
// CHECK-LABEL: func @fuse_ops_between
// CHECK-DAG: [[C0:%.*]] = arith.constant 0 : index
// CHECK-DAG: [[C1:%.*]] = arith.constant 1 : index
// CHECK-DAG: [[C2:%.*]] = arith.constant 2 : index
// CHECK: %{{.*}} = arith.addf %{{.*}}, %{{.*}} : f32
// CHECK: scf.parallel ([[I:%.*]], [[J:%.*]]) = ([[C0]], [[C0]])
// CHECK-SAME: to ([[C2]], [[C2]]) step ([[C1]], [[C1]]) {
// CHECK: scf.reduce
// CHECK: }
// CHECK-NOT: scf.parallel
// -----
func.func @fuse_two(%A: memref<2x2xf32>, %B: memref<2x2xf32>) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%c1fp = arith.constant 1.0 : f32
%sum = memref.alloc() : memref<2x2xf32>
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%sum_elem = arith.addf %B_elem, %c1fp : f32
memref.store %sum_elem, %sum[%i, %j] : memref<2x2xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%sum_elem = memref.load %sum[%i, %j] : memref<2x2xf32>
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
%product_elem = arith.mulf %sum_elem, %A_elem : f32
memref.store %product_elem, %B[%i, %j] : memref<2x2xf32>
scf.reduce
}
memref.dealloc %sum : memref<2x2xf32>
return
}
// CHECK-LABEL: func @fuse_two
// CHECK-SAME: ([[A:%.*]]: {{.*}}, [[B:%.*]]: {{.*}}) {
// CHECK-DAG: [[C2:%.*]] = arith.constant 2 : index
// CHECK-DAG: [[C0:%.*]] = arith.constant 0 : index
// CHECK-DAG: [[C1:%.*]] = arith.constant 1 : index
// CHECK-DAG: [[C1FP:%.*]] = arith.constant 1.
// CHECK: [[SUM:%.*]] = memref.alloc()
// CHECK: scf.parallel ([[I:%.*]], [[J:%.*]]) = ([[C0]], [[C0]])
// CHECK-SAME: to ([[C2]], [[C2]]) step ([[C1]], [[C1]]) {
// CHECK: [[B_ELEM:%.*]] = memref.load [[B]]{{\[}}[[I]], [[J]]]
// CHECK: [[SUM_ELEM:%.*]] = arith.addf [[B_ELEM]], [[C1FP]]
// CHECK: memref.store [[SUM_ELEM]], [[SUM]]{{\[}}[[I]], [[J]]]
// CHECK-NOT: scf.parallel
// CHECK: [[SUM_ELEM_:%.*]] = memref.load [[SUM]]{{\[}}[[I]], [[J]]]
// CHECK: [[A_ELEM:%.*]] = memref.load [[A]]{{\[}}[[I]], [[J]]]
// CHECK: [[PRODUCT_ELEM:%.*]] = arith.mulf [[SUM_ELEM_]], [[A_ELEM]]
// CHECK: memref.store [[PRODUCT_ELEM]], [[B]]{{\[}}[[I]], [[J]]]
// CHECK: scf.reduce
// CHECK: }
// CHECK: memref.dealloc [[SUM]]
// -----
func.func @fuse_three(%A: memref<2x2xf32>, %B: memref<2x2xf32>) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%c1fp = arith.constant 1.0 : f32
%c2fp = arith.constant 2.0 : f32
%sum = memref.alloc() : memref<2x2xf32>
%prod = memref.alloc() : memref<2x2xf32>
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%sum_elem = arith.addf %B_elem, %c1fp : f32
memref.store %sum_elem, %sum[%i, %j] : memref<2x2xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%sum_elem = memref.load %sum[%i, %j] : memref<2x2xf32>
%product_elem = arith.mulf %sum_elem, %c2fp : f32
memref.store %product_elem, %prod[%i, %j] : memref<2x2xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
%res_elem = arith.addf %A_elem, %c2fp : f32
memref.store %res_elem, %B[%i, %j] : memref<2x2xf32>
}
memref.dealloc %sum : memref<2x2xf32>
memref.dealloc %prod : memref<2x2xf32>
return
}
// CHECK-LABEL: func @fuse_three
// CHECK-SAME: ([[A:%.*]]: {{.*}}, [[B:%.*]]: {{.*}}) {
// CHECK-DAG: [[C2:%.*]] = arith.constant 2 : index
// CHECK-DAG: [[C0:%.*]] = arith.constant 0 : index
// CHECK-DAG: [[C1:%.*]] = arith.constant 1 : index
// CHECK-DAG: [[C1FP:%.*]] = arith.constant 1.
// CHECK-DAG: [[C2FP:%.*]] = arith.constant 2.
// CHECK: [[SUM:%.*]] = memref.alloc()
// CHECK: [[PROD:%.*]] = memref.alloc()
// CHECK: scf.parallel ([[I:%.*]], [[J:%.*]]) = ([[C0]], [[C0]])
// CHECK-SAME: to ([[C2]], [[C2]]) step ([[C1]], [[C1]]) {
// CHECK: [[B_ELEM:%.*]] = memref.load [[B]]{{\[}}[[I]], [[J]]]
// CHECK: [[SUM_ELEM:%.*]] = arith.addf [[B_ELEM]], [[C1FP]]
// CHECK: memref.store [[SUM_ELEM]], [[SUM]]{{\[}}[[I]], [[J]]]
// CHECK-NOT: scf.parallel
// CHECK: [[SUM_ELEM_:%.*]] = memref.load [[SUM]]{{\[}}[[I]], [[J]]]
// CHECK: [[PRODUCT_ELEM:%.*]] = arith.mulf [[SUM_ELEM_]], [[C2FP]]
// CHECK: memref.store [[PRODUCT_ELEM]], [[PROD]]{{\[}}[[I]], [[J]]]
// CHECK-NOT: scf.parallel
// CHECK: [[A_ELEM:%.*]] = memref.load [[A]]{{\[}}[[I]], [[J]]]
// CHECK: [[RES_ELEM:%.*]] = arith.addf [[A_ELEM]], [[C2FP]]
// CHECK: memref.store [[RES_ELEM]], [[B]]{{\[}}[[I]], [[J]]]
// CHECK: scf.reduce
// CHECK: }
// CHECK: memref.dealloc [[SUM]]
// CHECK: memref.dealloc [[PROD]]
// -----
func.func @do_not_fuse_nested_ploop1() {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.parallel (%k, %l) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
return
}
// CHECK-LABEL: func @do_not_fuse_nested_ploop1
// CHECK: scf.parallel
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @do_not_fuse_nested_ploop2() {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.parallel (%k, %l) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
scf.reduce
}
return
}
// CHECK-LABEL: func @do_not_fuse_nested_ploop2
// CHECK: scf.parallel
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @do_not_fuse_loops_unmatching_num_loops() {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
scf.parallel (%i) = (%c0) to (%c2) step (%c1) {
scf.reduce
}
return
}
// CHECK-LABEL: func @do_not_fuse_loops_unmatching_num_loops
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @do_not_fuse_loops_with_side_effecting_ops_in_between() {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
%buffer = memref.alloc() : memref<2x2xf32>
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
return
}
// CHECK-LABEL: func @do_not_fuse_loops_with_side_effecting_ops_in_between
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @do_not_fuse_loops_unmatching_iteration_space() {
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%c2 = arith.constant 2 : index
%c4 = arith.constant 4 : index
scf.parallel (%i, %j) = (%c0, %c0) to (%c4, %c4) step (%c2, %c2) {
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
return
}
// CHECK-LABEL: func @do_not_fuse_loops_unmatching_iteration_space
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @do_not_fuse_unmatching_write_read_patterns(
%A: memref<2x2xf32>, %B: memref<2x2xf32>,
%C: memref<2x2xf32>, %result: memref<2x2xf32>) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%common_buf = memref.alloc() : memref<2x2xf32>
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%C_elem = memref.load %C[%i, %j] : memref<2x2xf32>
%sum_elem = arith.addf %B_elem, %C_elem : f32
memref.store %sum_elem, %common_buf[%i, %j] : memref<2x2xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%k = arith.addi %i, %c1 : index
%sum_elem = memref.load %common_buf[%k, %j] : memref<2x2xf32>
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
%product_elem = arith.mulf %sum_elem, %A_elem : f32
memref.store %product_elem, %result[%i, %j] : memref<2x2xf32>
scf.reduce
}
memref.dealloc %common_buf : memref<2x2xf32>
return
}
// CHECK-LABEL: func @do_not_fuse_unmatching_write_read_patterns
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @do_not_fuse_unmatching_read_write_patterns(
%A: memref<2x2xf32>, %B: memref<2x2xf32>, %common_buf: memref<2x2xf32>) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%sum = memref.alloc() : memref<2x2xf32>
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%C_elem = memref.load %common_buf[%i, %j] : memref<2x2xf32>
%sum_elem = arith.addf %B_elem, %C_elem : f32
memref.store %sum_elem, %sum[%i, %j] : memref<2x2xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%k = arith.addi %i, %c1 : index
%sum_elem = memref.load %sum[%k, %j] : memref<2x2xf32>
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
%product_elem = arith.mulf %sum_elem, %A_elem : f32
memref.store %product_elem, %common_buf[%j, %i] : memref<2x2xf32>
scf.reduce
}
memref.dealloc %sum : memref<2x2xf32>
return
}
// CHECK-LABEL: func @do_not_fuse_unmatching_read_write_patterns
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @do_not_fuse_loops_with_memref_defined_in_loop_bodies() {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%buffer = memref.alloc() : memref<2x2xf32>
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%A = memref.subview %buffer[%c0, %c0][%c2, %c2][%c1, %c1]
: memref<2x2xf32> to memref<?x?xf32, strided<[?, ?], offset: ?>>
%A_elem = memref.load %A[%i, %j] : memref<?x?xf32, strided<[?, ?], offset: ?>>
scf.reduce
}
return
}
// CHECK-LABEL: func @do_not_fuse_loops_with_memref_defined_in_loop_bodies
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @nested_fuse(%A: memref<2x2xf32>, %B: memref<2x2xf32>) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%c1fp = arith.constant 1.0 : f32
%sum = memref.alloc() : memref<2x2xf32>
scf.parallel (%k) = (%c0) to (%c2) step (%c1) {
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%sum_elem = arith.addf %B_elem, %c1fp : f32
memref.store %sum_elem, %sum[%i, %j] : memref<2x2xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%sum_elem = memref.load %sum[%i, %j] : memref<2x2xf32>
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
%product_elem = arith.mulf %sum_elem, %A_elem : f32
memref.store %product_elem, %B[%i, %j] : memref<2x2xf32>
scf.reduce
}
}
memref.dealloc %sum : memref<2x2xf32>
return
}
// CHECK-LABEL: func @nested_fuse
// CHECK-SAME: ([[A:%.*]]: {{.*}}, [[B:%.*]]: {{.*}}) {
// CHECK-DAG: [[C2:%.*]] = arith.constant 2 : index
// CHECK-DAG: [[C0:%.*]] = arith.constant 0 : index
// CHECK-DAG: [[C1:%.*]] = arith.constant 1 : index
// CHECK-DAG: [[C1FP:%.*]] = arith.constant 1.
// CHECK: [[SUM:%.*]] = memref.alloc()
// CHECK: scf.parallel
// CHECK: scf.parallel ([[I:%.*]], [[J:%.*]]) = ([[C0]], [[C0]])
// CHECK-SAME: to ([[C2]], [[C2]]) step ([[C1]], [[C1]]) {
// CHECK: [[B_ELEM:%.*]] = memref.load [[B]]{{\[}}[[I]], [[J]]]
// CHECK: [[SUM_ELEM:%.*]] = arith.addf [[B_ELEM]], [[C1FP]]
// CHECK: memref.store [[SUM_ELEM]], [[SUM]]{{\[}}[[I]], [[J]]]
// CHECK-NOT: scf.parallel
// CHECK: [[SUM_ELEM_:%.*]] = memref.load [[SUM]]{{\[}}[[I]], [[J]]]
// CHECK: [[A_ELEM:%.*]] = memref.load [[A]]{{\[}}[[I]], [[J]]]
// CHECK: [[PRODUCT_ELEM:%.*]] = arith.mulf [[SUM_ELEM_]], [[A_ELEM]]
// CHECK: memref.store [[PRODUCT_ELEM]], [[B]]{{\[}}[[I]], [[J]]]
// CHECK: scf.reduce
// CHECK: }
// CHECK: }
// CHECK: memref.dealloc [[SUM]]
// -----
func.func @do_not_fuse_alias(%A: memref<2x2xf32>, %B: memref<2x2xf32>,
%C: memref<2x2xf32>, %result: memref<2x2xf32>,
%sum: memref<2x2xf32>) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%C_elem = memref.load %C[%i, %j] : memref<2x2xf32>
%sum_elem = arith.addf %B_elem, %C_elem : f32
memref.store %sum_elem, %sum[%i, %j] : memref<2x2xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%sum_elem = memref.load %sum[%i, %j] : memref<2x2xf32>
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
%product_elem = arith.mulf %sum_elem, %A_elem : f32
memref.store %product_elem, %result[%i, %j] : memref<2x2xf32>
scf.reduce
}
return
}
// %sum and %result may alias with other args, do not fuse loops
// CHECK-LABEL: func @do_not_fuse_alias
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @fuse_when_1st_has_multiple_stores(
%A: memref<2x2xf32>, %B: memref<2x2xf32>) {
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%c2 = arith.constant 2 : index
%c0fp = arith.constant 0.0 : f32
%sum = memref.alloc() : memref<2x2xf32>
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
memref.store %c0fp, %sum[%i, %j] : memref<2x2xf32>
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%sum_elem = arith.addf %B_elem, %B_elem : f32
memref.store %sum_elem, %sum[%i, %j] : memref<2x2xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%sum_elem = memref.load %sum[%i, %j] : memref<2x2xf32>
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
%product_elem = arith.mulf %sum_elem, %A_elem : f32
memref.store %product_elem, %B[%i, %j] : memref<2x2xf32>
scf.reduce
}
memref.dealloc %sum : memref<2x2xf32>
return
}
// CHECK-LABEL: func @fuse_when_1st_has_multiple_stores
// CHECK-SAME: ([[A:%.*]]: {{.*}}, [[B:%.*]]: {{.*}}) {
// CHECK-DAG: [[C0:%.*]] = arith.constant 0 : index
// CHECK-DAG: [[C1:%.*]] = arith.constant 1 : index
// CHECK-DAG: [[C2:%.*]] = arith.constant 2 : index
// CHECK-DAG: [[C0F32:%.*]] = arith.constant 0.
// CHECK: [[SUM:%.*]] = memref.alloc()
// CHECK: scf.parallel ([[I:%.*]], [[J:%.*]]) = ([[C0]], [[C0]])
// CHECK-SAME: to ([[C2]], [[C2]]) step ([[C1]], [[C1]]) {
// CHECK: [[B_ELEM:%.*]] = memref.load [[B]]{{\[}}[[I]], [[J]]]
// CHECK: [[SUM_ELEM:%.*]] = arith.addf [[B_ELEM]], [[B_ELEM]]
// CHECK: memref.store [[SUM_ELEM]], [[SUM]]{{\[}}[[I]], [[J]]]
// CHECK-NOT: scf.parallel
// CHECK: [[SUM_ELEM:%.*]] = memref.load [[SUM]]{{\[}}[[I]], [[J]]]
// CHECK: [[A_ELEM:%.*]] = memref.load [[A]]{{\[}}[[I]], [[J]]]
// CHECK: [[PRODUCT_ELEM:%.*]] = arith.mulf
// CHECK: memref.store [[PRODUCT_ELEM]], [[B]]{{\[}}[[I]], [[J]]]
// CHECK: scf.reduce
// CHECK: }
// CHECK: memref.dealloc [[SUM]]
// -----
func.func @do_not_fuse_multiple_stores_on_diff_indices(
%A: memref<2x2xf32>, %B: memref<2x2xf32>) {
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%c2 = arith.constant 2 : index
%c0fp = arith.constant 0.0 : f32
%sum = memref.alloc() : memref<2x2xf32>
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
memref.store %c0fp, %sum[%i, %j] : memref<2x2xf32>
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%sum_elem = arith.addf %B_elem, %B_elem : f32
memref.store %sum_elem, %sum[%c0, %j] : memref<2x2xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%sum_elem = memref.load %sum[%i, %j] : memref<2x2xf32>
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
%product_elem = arith.mulf %sum_elem, %A_elem : f32
memref.store %product_elem, %B[%i, %j] : memref<2x2xf32>
scf.reduce
}
memref.dealloc %sum : memref<2x2xf32>
return
}
// CHECK-LABEL: func @do_not_fuse_multiple_stores_on_diff_indices
// CHECK-SAME: ([[A:%.*]]: {{.*}}, [[B:%.*]]: {{.*}}) {
// CHECK-DAG: [[C0:%.*]] = arith.constant 0 : index
// CHECK-DAG: [[C1:%.*]] = arith.constant 1 : index
// CHECK-DAG: [[C2:%.*]] = arith.constant 2 : index
// CHECK-DAG: [[C0F32:%.*]] = arith.constant 0.
// CHECK: [[SUM:%.*]] = memref.alloc()
// CHECK: scf.parallel ([[I:%.*]], [[J:%.*]]) = ([[C0]], [[C0]])
// CHECK-SAME: to ([[C2]], [[C2]]) step ([[C1]], [[C1]]) {
// CHECK: [[B_ELEM:%.*]] = memref.load [[B]]{{\[}}[[I]], [[J]]]
// CHECK: [[SUM_ELEM:%.*]] = arith.addf [[B_ELEM]], [[B_ELEM]]
// CHECK: memref.store [[SUM_ELEM]], [[SUM]]{{\[}}[[C0]], [[J]]]
// CHECK: scf.reduce
// CHECK: scf.parallel ([[I:%.*]], [[J:%.*]]) = ([[C0]], [[C0]])
// CHECK: [[SUM_ELEM:%.*]] = memref.load [[SUM]]{{\[}}[[I]], [[J]]]
// CHECK: [[A_ELEM:%.*]] = memref.load [[A]]{{\[}}[[I]], [[J]]]
// CHECK: [[PRODUCT_ELEM:%.*]] = arith.mulf
// CHECK: memref.store [[PRODUCT_ELEM]], [[B]]{{\[}}[[I]], [[J]]]
// CHECK: scf.reduce
// CHECK: }
// CHECK: memref.dealloc [[SUM]]
// -----
func.func @fuse_same_indices_by_affine_apply(
%A: memref<2x2xf32>, %B: memref<2x2xf32>) {
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%c2 = arith.constant 2 : index
%sum = memref.alloc() : memref<2x3xf32>
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%1 = affine.apply affine_map<(d0, d1) -> (d0 + d1)>(%i, %j)
memref.store %B_elem, %sum[%i, %1] : memref<2x3xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%1 = affine.apply affine_map<(d0, d1) -> (d0 + d1)>(%i, %j)
%sum_elem = memref.load %sum[%i, %1] : memref<2x3xf32>
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
%product = arith.mulf %sum_elem, %A_elem : f32
memref.store %product, %B[%i, %j] : memref<2x2xf32>
scf.reduce
}
memref.dealloc %sum : memref<2x3xf32>
return
}
// CHECK: #[[$MAP:.*]] = affine_map<(d0, d1) -> (d0 + d1)>
// CHECK-LABEL: fuse_same_indices_by_affine_apply
// CHECK-SAME: (%[[ARG0:.*]]: memref<2x2xf32>, %[[ARG1:.*]]: memref<2x2xf32>) {
// CHECK-DAG: %[[C0:.*]] = arith.constant 0 : index
// CHECK-DAG: %[[C1:.*]] = arith.constant 1 : index
// CHECK-DAG: %[[C2:.*]] = arith.constant 2 : index
// CHECK: %[[ALLOC:.*]] = memref.alloc() : memref<2x3xf32>
// CHECK-NEXT: scf.parallel (%[[ARG2:.*]], %[[ARG3:.*]]) = (%[[C0]], %[[C0]]) to (%[[C2]], %[[C2]]) step (%[[C1]], %[[C1]]) {
// CHECK-NEXT: %[[S0:.*]] = memref.load %[[ARG1]][%[[ARG2]], %[[ARG3]]] : memref<2x2xf32>
// CHECK-NEXT: %[[S1:.*]] = affine.apply #[[$MAP]](%[[ARG2]], %[[ARG3]])
// CHECK-NEXT: memref.store %[[S0]], %[[ALLOC]][%[[ARG2]], %[[S1]]] : memref<2x3xf32>
// CHECK-NEXT: %[[S2:.*]] = affine.apply #[[$MAP]](%[[ARG2]], %[[ARG3]])
// CHECK-NEXT: %[[S3:.*]] = memref.load %[[ALLOC]][%[[ARG2]], %[[S2]]] : memref<2x3xf32>
// CHECK-NEXT: %[[S4:.*]] = memref.load %[[ARG0]][%[[ARG2]], %[[ARG3]]] : memref<2x2xf32>
// CHECK-NEXT: %[[S5:.*]] = arith.mulf %[[S3]], %[[S4]] : f32
// CHECK-NEXT: memref.store %[[S5]], %[[ARG1]][%[[ARG2]], %[[ARG3]]] : memref<2x2xf32>
// CHECK-NEXT: scf.reduce
// CHECK-NEXT: }
// CHECK-NEXT: memref.dealloc %[[ALLOC]] : memref<2x3xf32>
// CHECK-NEXT: return
// -----
func.func @do_not_fuse_affine_apply_to_non_ind_var(
%A: memref<2x2xf32>, %B: memref<2x2xf32>, %OffsetA: index, %OffsetB: index) {
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%c2 = arith.constant 2 : index
%sum = memref.alloc() : memref<2x3xf32>
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%1 = affine.apply affine_map<(d0, d1) -> (d0 + d1)>(%i, %OffsetA)
memref.store %B_elem, %sum[%i, %1] : memref<2x3xf32>
scf.reduce
}
scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) {
%1 = affine.apply affine_map<(d0, d1) -> (d0 + d1)>(%i, %OffsetB)
%sum_elem = memref.load %sum[%i, %1] : memref<2x3xf32>
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
%product = arith.mulf %sum_elem, %A_elem : f32
memref.store %product, %B[%i, %j] : memref<2x2xf32>
scf.reduce
}
memref.dealloc %sum : memref<2x3xf32>
return
}
// CHECK: #[[$MAP:.*]] = affine_map<(d0, d1) -> (d0 + d1)>
// CHECK-LABEL: do_not_fuse_affine_apply_to_non_ind_var
// CHECK-SAME: (%[[ARG0:.*]]: memref<2x2xf32>, %[[ARG1:.*]]: memref<2x2xf32>, %[[ARG2:.*]]: index, %[[ARG3:.*]]: index) {
// CHECK-DAG: %[[C0:.*]] = arith.constant 0 : index
// CHECK-DAG: %[[C1:.*]] = arith.constant 1 : index
// CHECK-DAG: %[[C2:.*]] = arith.constant 2 : index
// CHECK: %[[ALLOC:.*]] = memref.alloc() : memref<2x3xf32>
// CHECK-NEXT: scf.parallel (%[[ARG4:.*]], %[[ARG5:.*]]) = (%[[C0]], %[[C0]]) to (%[[C2]], %[[C2]]) step (%[[C1]], %[[C1]]) {
// CHECK-NEXT: %[[S0:.*]] = memref.load %[[ARG1]][%[[ARG4]], %[[ARG5]]] : memref<2x2xf32>
// CHECK-NEXT: %[[S1:.*]] = affine.apply #[[$MAP]](%[[ARG4]], %[[ARG2]])
// CHECK-NEXT: memref.store %[[S0]], %[[ALLOC]][%[[ARG4]], %[[S1]]] : memref<2x3xf32>
// CHECK-NEXT: scf.reduce
// CHECK-NEXT: }
// CHECK-NEXT: scf.parallel (%[[ARG4:.*]], %[[ARG5:.*]]) = (%[[C0]], %[[C0]]) to (%[[C2]], %[[C2]]) step (%[[C1]], %[[C1]]) {
// CHECK-NEXT: %[[S0:.*]] = affine.apply #[[$MAP]](%[[ARG4]], %[[ARG3]])
// CHECK-NEXT: %[[S1:.*]] = memref.load %[[ALLOC]][%[[ARG4]], %[[S0]]] : memref<2x3xf32>
// CHECK-NEXT: %[[S2:.*]] = memref.load %[[ARG0]][%[[ARG4]], %[[ARG5]]] : memref<2x2xf32>
// CHECK-NEXT: %[[S3:.*]] = arith.mulf %[[S1]], %[[S2]] : f32
// CHECK-NEXT: memref.store %[[S3]], %[[ARG1]][%[[ARG4]], %[[ARG5]]] : memref<2x2xf32>
// CHECK-NEXT: scf.reduce
// CHECK-NEXT: }
// CHECK-NEXT: memref.dealloc %[[ALLOC]] : memref<2x3xf32>
// CHECK-NEXT: return
// -----
func.func @fuse_reductions_two(%A: memref<2x2xf32>, %B: memref<2x2xf32>) -> (f32, f32) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%init1 = arith.constant 1.0 : f32
%init2 = arith.constant 2.0 : f32
%res1 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%init1) -> f32 {
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
scf.reduce(%A_elem : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.addf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
%res2 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%init2) -> f32 {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
scf.reduce(%B_elem : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.mulf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
return %res1, %res2 : f32, f32
}
// CHECK-LABEL: func @fuse_reductions_two
// CHECK-SAME: (%[[A:.*]]: memref<2x2xf32>, %[[B:.*]]: memref<2x2xf32>) -> (f32, f32)
// CHECK-DAG: %[[C0:.*]] = arith.constant 0 : index
// CHECK-DAG: %[[C1:.*]] = arith.constant 1 : index
// CHECK-DAG: %[[C2:.*]] = arith.constant 2 : index
// CHECK-DAG: %[[INIT1:.*]] = arith.constant 1.000000e+00 : f32
// CHECK-DAG: %[[INIT2:.*]] = arith.constant 2.000000e+00 : f32
// CHECK: %[[RES:.*]]:2 = scf.parallel (%[[I:.*]], %[[J:.*]]) = (%[[C0]], %[[C0]])
// CHECK-SAME: to (%[[C2]], %[[C2]]) step (%[[C1]], %[[C1]])
// CHECK-SAME: init (%[[INIT1]], %[[INIT2]]) -> (f32, f32)
// CHECK: %[[VAL_A:.*]] = memref.load %[[A]][%[[I]], %[[J]]]
// CHECK: %[[VAL_B:.*]] = memref.load %[[B]][%[[I]], %[[J]]]
// CHECK: scf.reduce(%[[VAL_A]], %[[VAL_B]] : f32, f32) {
// CHECK: ^bb0(%[[LHS:.*]]: f32, %[[RHS:.*]]: f32):
// CHECK: %[[R:.*]] = arith.addf %[[LHS]], %[[RHS]] : f32
// CHECK: scf.reduce.return %[[R]] : f32
// CHECK: }
// CHECK: ^bb0(%[[LHS:.*]]: f32, %[[RHS:.*]]: f32):
// CHECK: %[[R:.*]] = arith.mulf %[[LHS]], %[[RHS]] : f32
// CHECK: scf.reduce.return %[[R]] : f32
// CHECK: }
// CHECK: return %[[RES]]#0, %[[RES]]#1 : f32, f32
// -----
func.func @fuse_reductions_three(%A: memref<2x2xf32>, %B: memref<2x2xf32>, %C: memref<2x2xf32>) -> (f32, f32, f32) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%init1 = arith.constant 1.0 : f32
%init2 = arith.constant 2.0 : f32
%init3 = arith.constant 3.0 : f32
%res1 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%init1) -> f32 {
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
scf.reduce(%A_elem : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.addf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
%res2 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%init2) -> f32 {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
scf.reduce(%B_elem : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.mulf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
%res3 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%init3) -> f32 {
%A_elem = memref.load %C[%i, %j] : memref<2x2xf32>
scf.reduce(%A_elem : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.addf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
return %res1, %res2, %res3 : f32, f32, f32
}
// CHECK-LABEL: func @fuse_reductions_three
// CHECK-SAME: (%[[A:.*]]: memref<2x2xf32>, %[[B:.*]]: memref<2x2xf32>, %[[C:.*]]: memref<2x2xf32>) -> (f32, f32, f32)
// CHECK-DAG: %[[C0:.*]] = arith.constant 0 : index
// CHECK-DAG: %[[C1:.*]] = arith.constant 1 : index
// CHECK-DAG: %[[C2:.*]] = arith.constant 2 : index
// CHECK-DAG: %[[INIT1:.*]] = arith.constant 1.000000e+00 : f32
// CHECK-DAG: %[[INIT2:.*]] = arith.constant 2.000000e+00 : f32
// CHECK-DAG: %[[INIT3:.*]] = arith.constant 3.000000e+00 : f32
// CHECK: %[[RES:.*]]:3 = scf.parallel (%[[I:.*]], %[[J:.*]]) = (%[[C0]], %[[C0]])
// CHECK-SAME: to (%[[C2]], %[[C2]]) step (%[[C1]], %[[C1]])
// CHECK-SAME: init (%[[INIT1]], %[[INIT2]], %[[INIT3]]) -> (f32, f32, f32)
// CHECK: %[[VAL_A:.*]] = memref.load %[[A]][%[[I]], %[[J]]]
// CHECK: %[[VAL_B:.*]] = memref.load %[[B]][%[[I]], %[[J]]]
// CHECK: %[[VAL_C:.*]] = memref.load %[[C]][%[[I]], %[[J]]]
// CHECK: scf.reduce(%[[VAL_A]], %[[VAL_B]], %[[VAL_C]] : f32, f32, f32) {
// CHECK: ^bb0(%[[LHS:.*]]: f32, %[[RHS:.*]]: f32):
// CHECK: %[[R:.*]] = arith.addf %[[LHS]], %[[RHS]] : f32
// CHECK: scf.reduce.return %[[R]] : f32
// CHECK: }
// CHECK: ^bb0(%[[LHS:.*]]: f32, %[[RHS:.*]]: f32):
// CHECK: %[[R:.*]] = arith.mulf %[[LHS]], %[[RHS]] : f32
// CHECK: scf.reduce.return %[[R]] : f32
// CHECK: }
// CHECK: ^bb0(%[[LHS:.*]]: f32, %[[RHS:.*]]: f32):
// CHECK: %[[R:.*]] = arith.addf %[[LHS]], %[[RHS]] : f32
// CHECK: scf.reduce.return %[[R]] : f32
// CHECK: }
// CHECK: return %[[RES]]#0, %[[RES]]#1, %[[RES]]#2 : f32, f32, f32
// -----
func.func @reductions_use_res(%A: memref<2x2xf32>, %B: memref<2x2xf32>) -> (f32, f32) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%init1 = arith.constant 1.0 : f32
%res1 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%init1) -> f32 {
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
scf.reduce(%A_elem : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.addf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
%res2 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%res1) -> f32 {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
scf.reduce(%B_elem : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.mulf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
return %res1, %res2 : f32, f32
}
// %res1 is used as second scf.parallel arg, cannot fuse
// CHECK-LABEL: func @reductions_use_res
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @reductions_use_res_inside(%A: memref<2x2xf32>, %B: memref<2x2xf32>) -> (f32, f32) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%init1 = arith.constant 1.0 : f32
%init2 = arith.constant 2.0 : f32
%res1 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%init1) -> f32 {
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
scf.reduce(%A_elem : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.addf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
%res2 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%init2) -> f32 {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
%sum = arith.addf %B_elem, %res1 : f32
scf.reduce(%sum : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.mulf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
return %res1, %res2 : f32, f32
}
// %res1 is used inside second scf.parallel, cannot fuse
// CHECK-LABEL: func @reductions_use_res_inside
// CHECK: scf.parallel
// CHECK: scf.parallel
// -----
func.func @reductions_use_res_between(%A: memref<2x2xf32>, %B: memref<2x2xf32>) -> (f32, f32, f32) {
%c2 = arith.constant 2 : index
%c0 = arith.constant 0 : index
%c1 = arith.constant 1 : index
%init1 = arith.constant 1.0 : f32
%init2 = arith.constant 2.0 : f32
%res1 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%init1) -> f32 {
%A_elem = memref.load %A[%i, %j] : memref<2x2xf32>
scf.reduce(%A_elem : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.addf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
%res3 = arith.addf %res1, %init2 : f32
%res2 = scf.parallel (%i, %j) = (%c0, %c0) to (%c2, %c2) step (%c1, %c1) init(%init2) -> f32 {
%B_elem = memref.load %B[%i, %j] : memref<2x2xf32>
scf.reduce(%B_elem : f32) {
^bb0(%lhs: f32, %rhs: f32):
%1 = arith.mulf %lhs, %rhs : f32
scf.reduce.return %1 : f32
}
}
return %res1, %res2, %res3 : f32, f32, f32
}
// instruction in between the loops uses the first loop result
// CHECK-LABEL: func @reductions_use_res_between
// CHECK: scf.parallel
// CHECK: scf.parallel
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