derek.holloway
7502bf64a4
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161 lines
5.5 KiB
MLIR
161 lines
5.5 KiB
MLIR
// RUN: mlir-opt %s --mem2reg --split-input-file | FileCheck %s
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// Check that a store inside a forall prevents promotion.
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// CHECK-LABEL: func.func @forall_store
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// CHECK-SAME: (%[[UB:.*]]: index)
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// CHECK: %[[C5:.*]] = arith.constant 5 : i32
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// CHECK: %[[C7:.*]] = arith.constant 7 : i32
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// CHECK: %[[ALLOCA:.*]] = memref.alloca() : memref<i32>
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// CHECK: memref.store %[[C5]], %[[ALLOCA]][]
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// CHECK: scf.forall (%{{.*}}) in (%[[UB]]) {
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// CHECK: memref.store %[[C7]], %[[ALLOCA]][]
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// CHECK: }
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// CHECK: %[[LOAD:.*]] = memref.load %[[ALLOCA]][]
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// CHECK: return %[[LOAD]] : i32
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func.func @forall_store(%ub: index) -> i32 {
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%c5 = arith.constant 5 : i32
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%c7 = arith.constant 7 : i32
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%alloca = memref.alloca() : memref<i32>
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memref.store %c5, %alloca[] : memref<i32>
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scf.forall (%i) in (%ub) {
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memref.store %c7, %alloca[] : memref<i32>
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}
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%load = memref.load %alloca[] : memref<i32>
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return %load : i32
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}
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// -----
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// Check that a store inside an if inside a forall prevents promotion.
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// CHECK-LABEL: func.func @forall_if_store
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// CHECK-SAME: (%[[UB:.*]]: index, %[[COND:.*]]: i1)
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// CHECK: %[[C5:.*]] = arith.constant 5 : i32
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// CHECK: %[[C7:.*]] = arith.constant 7 : i32
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// CHECK: %[[ALLOCA:.*]] = memref.alloca() : memref<i32>
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// CHECK: memref.store %[[C5]], %[[ALLOCA]][]
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// CHECK: scf.forall (%{{.*}}) in (%[[UB]]) {
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// CHECK: scf.if %[[COND]] {
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// CHECK: memref.store %[[C7]], %[[ALLOCA]][]
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// CHECK: }
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// CHECK: }
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// CHECK: %[[LOAD:.*]] = memref.load %[[ALLOCA]][]
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// CHECK: return %[[LOAD]] : i32
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func.func @forall_if_store(%ub: index, %cond: i1) -> i32 {
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%c5 = arith.constant 5 : i32
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%c7 = arith.constant 7 : i32
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%alloca = memref.alloca() : memref<i32>
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memref.store %c5, %alloca[] : memref<i32>
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scf.forall (%i) in (%ub) {
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scf.if %cond {
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memref.store %c7, %alloca[] : memref<i32>
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scf.yield
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}
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}
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%load = memref.load %alloca[] : memref<i32>
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return %load : i32
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}
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// -----
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// Check that a store inside a parallel prevents promotion.
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// CHECK-LABEL: func.func @parallel_store
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// CHECK-SAME: (%[[LB:.*]]: index, %[[UB:.*]]: index, %[[STEP:.*]]: index)
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// CHECK: %[[C5:.*]] = arith.constant 5 : i32
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// CHECK: %[[C7:.*]] = arith.constant 7 : i32
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// CHECK: %[[ALLOCA:.*]] = memref.alloca() : memref<i32>
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// CHECK: memref.store %[[C5]], %[[ALLOCA]][]
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// CHECK: scf.parallel (%{{.*}}) = (%[[LB]]) to (%[[UB]]) step (%[[STEP]]) {
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// CHECK: memref.store %[[C7]], %[[ALLOCA]][]
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// CHECK: scf.reduce
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// CHECK: }
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// CHECK: %[[LOAD:.*]] = memref.load %[[ALLOCA]][]
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// CHECK: return %[[LOAD]] : i32
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func.func @parallel_store(%lb: index, %ub: index, %step: index) -> i32 {
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%c5 = arith.constant 5 : i32
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%c7 = arith.constant 7 : i32
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%alloca = memref.alloca() : memref<i32>
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memref.store %c5, %alloca[] : memref<i32>
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scf.parallel (%i) = (%lb) to (%ub) step (%step) {
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memref.store %c7, %alloca[] : memref<i32>
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scf.reduce
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}
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%load = memref.load %alloca[] : memref<i32>
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return %load : i32
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}
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// -----
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// Check that a store inside an if inside a parallel prevents promotion.
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// CHECK-LABEL: func.func @parallel_if_store
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// CHECK-SAME: (%[[LB:.*]]: index, %[[UB:.*]]: index, %[[STEP:.*]]: index, %[[COND:.*]]: i1)
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// CHECK: %[[C5:.*]] = arith.constant 5 : i32
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// CHECK: %[[C7:.*]] = arith.constant 7 : i32
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// CHECK: %[[ALLOCA:.*]] = memref.alloca() : memref<i32>
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// CHECK: memref.store %[[C5]], %[[ALLOCA]][]
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// CHECK: scf.parallel (%{{.*}}) = (%[[LB]]) to (%[[UB]]) step (%[[STEP]]) {
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// CHECK: scf.if %[[COND]] {
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// CHECK: memref.store %[[C7]], %[[ALLOCA]][]
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// CHECK: }
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// CHECK: scf.reduce
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// CHECK: }
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// CHECK: %[[LOAD:.*]] = memref.load %[[ALLOCA]][]
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// CHECK: return %[[LOAD]] : i32
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func.func @parallel_if_store(%lb: index, %ub: index, %step: index, %cond: i1) -> i32 {
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%c5 = arith.constant 5 : i32
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%c7 = arith.constant 7 : i32
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%alloca = memref.alloca() : memref<i32>
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memref.store %c5, %alloca[] : memref<i32>
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scf.parallel (%i) = (%lb) to (%ub) step (%step) {
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scf.if %cond {
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memref.store %c7, %alloca[] : memref<i32>
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scf.yield
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}
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scf.reduce
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}
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%load = memref.load %alloca[] : memref<i32>
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return %load : i32
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}
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// -----
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// Check that a store inside a reduce region prevents promotion.
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// CHECK-LABEL: func.func @parallel_reduce_store
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// CHECK-SAME: (%[[LB:.*]]: index, %[[UB:.*]]: index, %[[STEP:.*]]: index)
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// CHECK: %[[C5:.*]] = arith.constant 5 : i32
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// CHECK: %[[C0:.*]] = arith.constant 0 : i32
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// CHECK: %[[ALLOCA:.*]] = memref.alloca() : memref<i32>
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// CHECK: memref.store %[[C5]], %[[ALLOCA]][]
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// CHECK: %[[RES:.*]] = scf.parallel (%{{.*}}) = (%[[LB]]) to (%[[UB]]) step (%[[STEP]]) init (%[[C0]]) -> i32 {
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// CHECK: %[[C1:.*]] = arith.constant 1 : i32
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// CHECK: scf.reduce(%[[C1]] : i32) {
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// CHECK: ^{{.*}}(%[[LHS:.*]]: i32, %[[RHS:.*]]: i32):
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// CHECK: %[[SUM:.*]] = arith.addi %[[LHS]], %[[RHS]] : i32
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// CHECK: memref.store %[[SUM]], %[[ALLOCA]][]
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// CHECK: scf.reduce.return %[[SUM]] : i32
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// CHECK: }
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// CHECK: }
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// CHECK: %[[LOAD:.*]] = memref.load %[[ALLOCA]][]
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// CHECK: return %[[LOAD]] : i32
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func.func @parallel_reduce_store(%lb: index, %ub: index, %step: index) -> i32 {
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%c5 = arith.constant 5 : i32
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%c0 = arith.constant 0 : i32
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%alloca = memref.alloca() : memref<i32>
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memref.store %c5, %alloca[] : memref<i32>
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%res = scf.parallel (%i) = (%lb) to (%ub) step (%step) init (%c0) -> i32 {
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%c1 = arith.constant 1 : i32
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scf.reduce(%c1 : i32) {
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^bb0(%lhs: i32, %rhs: i32):
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%sum = arith.addi %lhs, %rhs : i32
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memref.store %sum, %alloca[] : memref<i32>
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scf.reduce.return %sum : i32
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}
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}
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%load = memref.load %alloca[] : memref<i32>
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return %load : i32
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}
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