a6628e596e
Depends On D95311 Previous automatic-ref-counting pass worked with high level async operations (e.g. async.execute), however async values reference counting is a runtime implementation detail. New pass mostly relies on the save liveness analysis to place drop_ref operations, and does better verification of CFG with different liveIn sets in block successors. This is almost NFC change. No new reference counting ideas, just a cleanup of the previous version. Reviewed By: mehdi_amini Differential Revision: https://reviews.llvm.org/D95390
56 lines
1.9 KiB
MLIR
56 lines
1.9 KiB
MLIR
// RUN: mlir-opt %s -async-runtime-ref-counting-opt | FileCheck %s
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func private @consume_token(%arg0: !async.token)
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// CHECK-LABEL: @cancellable_operations_0
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func @cancellable_operations_0(%arg0: !async.token) {
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// CHECK-NOT: async.runtime.add_ref
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// CHECK-NOT: async.runtime.drop_ref
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async.runtime.add_ref %arg0 {count = 1 : i32} : !async.token
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async.runtime.drop_ref %arg0 {count = 1 : i32} : !async.token
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// CHECK: return
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return
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}
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// CHECK-LABEL: @cancellable_operations_1
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func @cancellable_operations_1(%arg0: !async.token) {
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// CHECK-NOT: async.runtime.add_ref
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async.runtime.add_ref %arg0 {count = 1 : i32} : !async.token
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// CHECK: call @consume_toke
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call @consume_token(%arg0): (!async.token) -> ()
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// CHECK-NOT: async.runtime.drop_ref
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async.runtime.drop_ref %arg0 {count = 1 : i32} : !async.token
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// CHECK: return
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return
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}
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// CHECK-LABEL: @cancellable_operations_2
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func @cancellable_operations_2(%arg0: !async.token) {
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// CHECK: async.runtime.await
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// CHECK-NEXT: async.runtime.await
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// CHECK-NEXT: async.runtime.await
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// CHECK-NEXT: return
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async.runtime.add_ref %arg0 {count = 1 : i32} : !async.token
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async.runtime.await %arg0 : !async.token
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async.runtime.drop_ref %arg0 {count = 1 : i32} : !async.token
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async.runtime.await %arg0 : !async.token
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async.runtime.add_ref %arg0 {count = 1 : i32} : !async.token
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async.runtime.await %arg0 : !async.token
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async.runtime.drop_ref %arg0 {count = 1 : i32} : !async.token
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return
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}
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// CHECK-LABEL: @cancellable_operations_3
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func @cancellable_operations_3(%arg0: !async.token) {
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// CHECK-NOT: add_ref
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async.runtime.add_ref %arg0 {count = 1 : i32} : !async.token
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// CHECK: call @consume_toke
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call @consume_token(%arg0): (!async.token) -> ()
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// CHECK-NOT: async.runtime.drop_ref
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async.runtime.drop_ref %arg0 {count = 1 : i32} : !async.token
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// CHECK: async.runtime.await
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async.runtime.await %arg0 : !async.token
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// CHECK: return
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return
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}
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