// RUN: mlir-opt -verify-diagnostics -ownership-based-buffer-deallocation \
// RUN: --buffer-deallocation-simplification -split-input-file %s | FileCheck %s
// RUN: mlir-opt -verify-diagnostics -ownership-based-buffer-deallocation=private-function-dynamic-ownership=true -split-input-file %s > /dev/null
// RUN: mlir-opt %s -buffer-deallocation-pipeline --split-input-file > /dev/null
// Test Case: Dead operations in a single block.
// BufferDeallocation expected behavior: It only inserts the two missing
// DeallocOps after the last BufferBasedOp.
// CHECK-LABEL: func @redundantOperations
func.func @redundantOperations(%arg0: memref<2xf32>) {
%0 = memref.alloc() : memref<2xf32>
test.buffer_based in(%arg0: memref<2xf32>) out(%0: memref<2xf32>)
%1 = memref.alloc() : memref<2xf32>
test.buffer_based in(%0: memref<2xf32>) out(%1: memref<2xf32>)
return
}
// CHECK: (%[[ARG0:.*]]: {{.*}})
// CHECK: %[[FIRST_ALLOC:.*]] = memref.alloc()
// CHECK-NOT: bufferization.dealloc
// CHECK: test.buffer_based in(%[[ARG0]]{{.*}}out(%[[FIRST_ALLOC]]
// CHECK-NOT: bufferization.dealloc
// CHECK: %[[SECOND_ALLOC:.*]] = memref.alloc()
// CHECK-NOT: bufferization.dealloc
// CHECK: test.buffer_based in(%[[FIRST_ALLOC]]{{.*}}out(%[[SECOND_ALLOC]]
// CHECK: bufferization.dealloc (%[[FIRST_ALLOC]] :{{.*}}) if (%true{{[0-9_]*}})
// CHECK: bufferization.dealloc (%[[SECOND_ALLOC]] :{{.*}}) if (%true{{[0-9_]*}})
// CHECK-NEXT: return
// TODO: The dealloc could be split in two to avoid runtime aliasing checks
// since we can be sure at compile time that they will never alias.
// -----
// CHECK-LABEL: func @allocaIsNotDeallocated
func.func @allocaIsNotDeallocated(%arg0: memref<2xf32>) {
%0 = memref.alloc() : memref<2xf32>
test.buffer_based in(%arg0: memref<2xf32>) out(%0: memref<2xf32>)
%1 = memref.alloca() : memref<2xf32>
test.buffer_based in(%0: memref<2xf32>) out(%1: memref<2xf32>)
return
}
// CHECK: (%[[ARG0:.*]]: {{.*}})
// CHECK: %[[FIRST_ALLOC:.*]] = memref.alloc()
// CHECK-NEXT: test.buffer_based in(%[[ARG0]]{{.*}}out(%[[FIRST_ALLOC]]
// CHECK-NEXT: %[[SECOND_ALLOC:.*]] = memref.alloca()
// CHECK-NEXT: test.buffer_based in(%[[FIRST_ALLOC]]{{.*}}out(%[[SECOND_ALLOC]]
// CHECK: bufferization.dealloc (%[[FIRST_ALLOC]] :{{.*}}) if (%true{{[0-9_]*}})
// CHECK-NEXT: return
// -----
// Test Case: Inserting missing DeallocOp in a single block.
// CHECK-LABEL: func @inserting_missing_dealloc_simple
func.func @inserting_missing_dealloc_simple(
%arg0 : memref<2xf32>,
%arg1: memref<2xf32>) {
%0 = memref.alloc() : memref<2xf32>
test.buffer_based in(%arg0: memref<2xf32>) out(%0: memref<2xf32>)
test.copy(%0, %arg1) : (memref<2xf32>, memref<2xf32>)
return
}
// CHECK: %[[ALLOC0:.*]] = memref.alloc()
// CHECK: test.copy
// CHECK: bufferization.dealloc (%[[ALLOC0]] :{{.*}}) if (%true{{[0-9_]*}})
// -----
// Test Case: The ownership indicator is set to false for alloca
// CHECK-LABEL: func @alloca_ownership_indicator_is_false
func.func @alloca_ownership_indicator_is_false() {
%0 = memref.alloca() : memref<2xf32>
cf.br ^bb1(%0: memref<2xf32>)
^bb1(%arg0 : memref<2xf32>):
return
}
// CHECK: %[[ALLOC0:.*]] = memref.alloca()
// CHECK-NEXT: cf.br ^bb1(%[[ALLOC0]], %false :
// CHECK-NEXT: ^bb1([[A0:%.+]]: memref<2xf32>, [[COND0:%.+]]: i1):
// CHECK: [[BASE:%[a-zA-Z0-9_]+]]{{.*}} = memref.extract_strided_metadata [[A0]]
// CHECK: bufferization.dealloc ([[BASE]] : {{.*}}) if ([[COND0]])
// CHECK-NEXT: return
// -----
func.func @dealloc_existing_clones(%arg0: memref<?x?xf64>, %arg1: memref<?x?xf64>) -> memref<?x?xf64> {
%0 = bufferization.clone %arg0 : memref<?x?xf64> to memref<?x?xf64>
%1 = bufferization.clone %arg1 : memref<?x?xf64> to memref<?x?xf64>
return %0 : memref<?x?xf64>
}
// CHECK-LABEL: func @dealloc_existing_clones
// CHECK: (%[[ARG0:.*]]: memref<?x?xf64>, %[[ARG1:.*]]: memref<?x?xf64>)
// CHECK: %[[RES0:.*]] = bufferization.clone %[[ARG0]]
// CHECK: %[[RES1:.*]] = bufferization.clone %[[ARG1]]
// CHECK-NEXT: bufferization.dealloc (%[[RES1]] :{{.*}}) if (%true{{[0-9_]*}})
// CHECK-NOT: retain
// CHECK-NEXT: return %[[RES0]]
// TODO: The retain operand could be dropped to avoid runtime aliasing checks
// since We can guarantee at compile-time that it will never alias with the
// dealloc operand
// -----
memref.global "private" constant @__constant_4xf32 : memref<4xf32> = dense<[1.000000e+00, 2.000000e+00, 3.000000e+00, 4.000000e+00]>
func.func @op_without_aliasing_and_allocation() -> memref<4xf32> {
%0 = memref.get_global @__constant_4xf32 : memref<4xf32>
return %0 : memref<4xf32>
}
// CHECK-LABEL: func @op_without_aliasing_and_allocation
// CHECK: [[GLOBAL:%.+]] = memref.get_global @__constant_4xf32
// CHECK: [[RES:%.+]] = scf.if %false
// CHECK: scf.yield [[GLOBAL]] :
// CHECK: [[CLONE:%.+]] = bufferization.clone [[GLOBAL]]
// CHECK: scf.yield [[CLONE]] :
// CHECK: return [[RES]] :
// -----
// Allocations with "bufferization.manual_deallocation" are assigned an
// ownership of "false".
func.func @manual_deallocation(%c: i1, %f: f32, %idx: index) -> f32 {
%0 = memref.alloc() {bufferization.manual_deallocation} : memref<5xf32>
linalg.fill ins(%f : f32) outs(%0 : memref<5xf32>)
%1 = memref.alloc() : memref<5xf32>
linalg.fill ins(%f : f32) outs(%1 : memref<5xf32>)
%2 = arith.select %c, %0, %1 : memref<5xf32>
%3 = memref.load %2[%idx] : memref<5xf32>
// Only buffers that are under "manual deallocation" are allowed to be
// deallocated with memref.dealloc. For consistency reasons, the
// manual_deallocation attribute must also be specified. A runtime insertion
// is inserted to ensure that we do not have ownership. (This is not a
// bulletproof check, but covers some cases of invalid IR.)
memref.dealloc %0 {bufferization.manual_deallocation} : memref<5xf32>
return %3 : f32
}
// CHECK-LABEL: func @manual_deallocation(
// CHECK: %[[true:.*]] = arith.constant true
// CHECK: %[[manual_alloc:.*]] = memref.alloc() {bufferization.manual_deallocation} : memref<5xf32>
// CHECK: %[[managed_alloc:.*]] = memref.alloc() : memref<5xf32>
// CHECK: %[[selected:.*]] = arith.select
// CHECK: cf.assert %[[true]], "expected that the block does not have ownership"
// CHECK: memref.dealloc %[[manual_alloc]]
// CHECK: bufferization.dealloc (%[[managed_alloc]] : memref<5xf32>) if (%[[true]])
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