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1// RUN: mlir-opt %s -convert-cf-to-llvm -split-input-file | FileCheck %s2 3// Unstructured control flow is converted, but the enclosing op is not4// converted.5 6// CHECK-LABEL: func.func @cf_br(7// CHECK-SAME: %[[arg0:.*]]: index) -> index {8// CHECK: %[[cast0:.*]] = builtin.unrealized_conversion_cast %[[arg0]] : index to i649// CHECK: llvm.br ^[[bb1:.*]](%[[cast0]] : i64)10// CHECK: ^[[bb1]](%[[arg1:.*]]: i64):11// CHECK: %[[cast1:.*]] = builtin.unrealized_conversion_cast %[[arg1]] : i64 to index12// CHECK: return %[[cast1]] : index13// CHECK: }14func.func @cf_br(%arg0: index) -> index {15 cf.br ^bb1(%arg0 : index)16^bb1(%arg1: index):17 return %arg1 : index18}19 20// -----21 22// func.func and func.return types match. No unrealized_conversion_cast is23// needed.24 25// CHECK-LABEL: func.func @cf_br_type_match(26// CHECK-SAME: %[[arg0:.*]]: i64) -> i64 {27// CHECK: llvm.br ^[[bb1:.*]](%[[arg0:.*]] : i64)28// CHECK: ^[[bb1]](%[[arg1:.*]]: i64):29// CHECK: return %[[arg1]] : i6430// CHECK: }31func.func @cf_br_type_match(%arg0: i64) -> i64 {32 cf.br ^bb1(%arg0 : i64)33^bb1(%arg1: i64):34 return %arg1 : i6435}36 37// -----38 39// Test case for cf.cond_br.40 41// CHECK-LABEL: func.func @cf_cond_br42// CHECK-COUNT-2: unrealized_conversion_cast {{.*}} : index to i6443// CHECK: llvm.cond_br %{{.*}}, ^{{.*}}(%{{.*}} : i64), ^{{.*}}(%{{.*}} : i64)44// CHECK: ^{{.*}}(%{{.*}}: i64):45// CHECK: unrealized_conversion_cast {{.*}} : i64 to index46// CHECK: ^{{.*}}(%{{.*}}: i64):47// CHECK: unrealized_conversion_cast {{.*}} : i64 to index48func.func @cf_cond_br(%cond: i1, %a: index, %b: index) -> index {49 cf.cond_br %cond, ^bb1(%a : index), ^bb2(%b : index)50^bb1(%arg1: index):51 return %arg1 : index52^bb2(%arg2: index):53 return %arg2 : index54}55 56// -----57 58// Unreachable block (and IR in general) is not converted during a dialect59// conversion.60 61// CHECK-LABEL: func.func @unreachable_block()62// CHECK: return63// CHECK: ^[[bb1:.*]](%[[arg0:.*]]: index):64// CHECK: cf.br ^[[bb1]](%[[arg0]] : index)65func.func @unreachable_block() {66 return67^bb1(%arg0: index):68 cf.br ^bb1(%arg0 : index)69}70 71// -----72 73// Test case for cf.cond_br with weights.74 75// CHECK-LABEL: func.func @cf_cond_br_with_weights(76func.func @cf_cond_br_with_weights(%cond: i1, %a: index, %b: index) -> index {77// CHECK: llvm.cond_br %{{.*}} weights([90, 10]), ^bb1(%{{.*}} : i64), ^bb2(%{{.*}} : i64)78 cf.cond_br %cond, ^bb1(%a : index), ^bb2(%b : index) {branch_weights = array<i32: 90, 10>}79^bb1(%arg1: index):80 return %arg1 : index81^bb2(%arg2: index):82 return %arg2 : index83}84