derek.holloway
7502bf64a4
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67 lines
2.1 KiB
MLIR
67 lines
2.1 KiB
MLIR
// RUN: mlir-opt %s -convert-cf-to-llvm -split-input-file | FileCheck %s
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// Unstructured control flow is converted, but the enclosing op is not
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// converted.
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// CHECK-LABEL: func.func @single_case(
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// CHECK-SAME: %[[val:.*]]: i32, %[[idx:.*]]: index) -> index {
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// CHECK: %[[cast0:.*]] = builtin.unrealized_conversion_cast %[[idx]] : index to i64
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// CHECK: llvm.switch %[[val]] : i32, ^[[bb1:.*]](%[[cast0]] : i64) [
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// CHECK: ]
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// CHECK: ^[[bb1]](%[[arg0:.*]]: i64):
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// CHECK: %[[cast1:.*]] = builtin.unrealized_conversion_cast %[[arg0]] : i64 to index
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// CHECK: return %[[cast1]] : index
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// CHECK: }
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func.func @single_case(%val: i32, %idx: index) -> index {
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cf.switch %val : i32, [
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default: ^bb1(%idx : index)
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]
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^bb1(%arg0: index):
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return %arg0 : index
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}
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// -----
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// func.func and func.return types match. No unrealized_conversion_cast is
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// needed.
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// CHECK-LABEL: func.func @single_case_type_match(
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// CHECK-SAME: %[[val:.*]]: i32, %[[i:.*]]: i64) -> i64 {
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// CHECK: llvm.switch %[[val]] : i32, ^[[bb1:.*]](%[[i]] : i64) [
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// CHECK: ]
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// CHECK: ^[[bb1]](%[[arg0:.*]]: i64):
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// CHECK: return %[[arg0]] : i64
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// CHECK: }
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func.func @single_case_type_match(%val: i32, %i: i64) -> i64 {
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cf.switch %val : i32, [
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default: ^bb1(%i : i64)
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]
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^bb1(%arg0: i64):
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return %arg0 : i64
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}
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// -----
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// CHECK-LABEL: func.func @multi_case
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// CHECK-COUNT-2: unrealized_conversion_cast {{.*}} : index to i64
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// CHECK: llvm.switch %{{.*}} : i32, ^{{.*}}(%{{.*}} : i64) [
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// CHECK: 12: ^{{.*}}(%{{.*}} : i64),
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// CHECK: 13: ^{{.*}}(%{{.*}} : i64),
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// CHECK: 14: ^{{.*}}(%{{.*}} : i64)
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// CHECK: ]
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func.func @multi_case(%val: i32, %idx1: index, %idx2: index, %i: i64) -> index {
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cf.switch %val : i32, [
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default: ^bb1(%idx1 : index),
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12: ^bb2(%idx2 : index),
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13: ^bb1(%idx1 : index),
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14: ^bb3(%i : i64)
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]
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^bb1(%arg0: index):
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return %arg0 : index
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^bb2(%arg1: index):
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return %arg1 : index
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^bb3(%arg2: i64):
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%cast = arith.index_cast %arg2 : i64 to index
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return %cast : index
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}
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