derek.holloway
7502bf64a4
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84 lines
2.6 KiB
MLIR
84 lines
2.6 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 @cf_br(
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// CHECK-SAME: %[[arg0:.*]]: index) -> index {
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// CHECK: %[[cast0:.*]] = builtin.unrealized_conversion_cast %[[arg0]] : index to i64
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// CHECK: llvm.br ^[[bb1:.*]](%[[cast0]] : i64)
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// CHECK: ^[[bb1]](%[[arg1:.*]]: i64):
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// CHECK: %[[cast1:.*]] = builtin.unrealized_conversion_cast %[[arg1]] : i64 to index
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// CHECK: return %[[cast1]] : index
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// CHECK: }
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func.func @cf_br(%arg0: index) -> index {
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cf.br ^bb1(%arg0 : index)
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^bb1(%arg1: index):
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return %arg1 : 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 @cf_br_type_match(
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// CHECK-SAME: %[[arg0:.*]]: i64) -> i64 {
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// CHECK: llvm.br ^[[bb1:.*]](%[[arg0:.*]] : i64)
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// CHECK: ^[[bb1]](%[[arg1:.*]]: i64):
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// CHECK: return %[[arg1]] : i64
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// CHECK: }
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func.func @cf_br_type_match(%arg0: i64) -> i64 {
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cf.br ^bb1(%arg0 : i64)
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^bb1(%arg1: i64):
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return %arg1 : i64
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}
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// -----
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// Test case for cf.cond_br.
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// CHECK-LABEL: func.func @cf_cond_br
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// CHECK-COUNT-2: unrealized_conversion_cast {{.*}} : index to i64
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// CHECK: llvm.cond_br %{{.*}}, ^{{.*}}(%{{.*}} : i64), ^{{.*}}(%{{.*}} : i64)
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// CHECK: ^{{.*}}(%{{.*}}: i64):
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// CHECK: unrealized_conversion_cast {{.*}} : i64 to index
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// CHECK: ^{{.*}}(%{{.*}}: i64):
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// CHECK: unrealized_conversion_cast {{.*}} : i64 to index
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func.func @cf_cond_br(%cond: i1, %a: index, %b: index) -> index {
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cf.cond_br %cond, ^bb1(%a : index), ^bb2(%b : index)
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^bb1(%arg1: index):
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return %arg1 : index
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^bb2(%arg2: index):
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return %arg2 : index
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}
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// -----
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// Unreachable block (and IR in general) is not converted during a dialect
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// conversion.
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// CHECK-LABEL: func.func @unreachable_block()
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// CHECK: return
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// CHECK: ^[[bb1:.*]](%[[arg0:.*]]: index):
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// CHECK: cf.br ^[[bb1]](%[[arg0]] : index)
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func.func @unreachable_block() {
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return
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^bb1(%arg0: index):
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cf.br ^bb1(%arg0 : index)
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}
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// -----
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// Test case for cf.cond_br with weights.
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// CHECK-LABEL: func.func @cf_cond_br_with_weights(
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func.func @cf_cond_br_with_weights(%cond: i1, %a: index, %b: index) -> index {
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// CHECK: llvm.cond_br %{{.*}} weights([90, 10]), ^bb1(%{{.*}} : i64), ^bb2(%{{.*}} : i64)
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cf.cond_br %cond, ^bb1(%a : index), ^bb2(%b : index) {branch_weights = array<i32: 90, 10>}
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^bb1(%arg1: index):
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return %arg1 : index
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^bb2(%arg2: index):
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return %arg2 : index
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}
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