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// RUN: mlir-opt --split-input-file --convert-cf-to-spirv --verify-diagnostics %s | FileCheck %s
//===----------------------------------------------------------------------===//
// cf.br, cf.cond_br
//===----------------------------------------------------------------------===//
module attributes {
spirv.target_env = #spirv.target_env<#spirv.vce<v1.0, [], []>, #spirv.resource_limits<>>
} {
// CHECK-LABEL: func @simple_loop
func.func @simple_loop(%begin: i32, %end: i32, %step: i32) {
// CHECK-NEXT: spirv.Branch ^bb1
cf.br ^bb1
// CHECK-NEXT: ^bb1: // pred: ^bb0
// CHECK-NEXT: spirv.Branch ^bb2({{.*}} : i32)
^bb1: // pred: ^bb0
cf.br ^bb2(%begin : i32)
// CHECK: ^bb2({{.*}}: i32): // 2 preds: ^bb1, ^bb3
// CHECK: spirv.BranchConditional {{.*}}, ^bb3, ^bb4
^bb2(%0: i32): // 2 preds: ^bb1, ^bb3
%1 = arith.cmpi slt, %0, %end : i32
cf.cond_br %1, ^bb3, ^bb4
// CHECK: ^bb3: // pred: ^bb2
// CHECK: spirv.Branch ^bb2({{.*}} : i32)
^bb3: // pred: ^bb2
%2 = arith.addi %0, %step : i32
cf.br ^bb2(%2 : i32)
// CHECK: ^bb4: // pred: ^bb2
^bb4: // pred: ^bb2
return
}
}
// -----
// Handle blocks whose arguments require type conversion.
// CHECK-LABEL: func.func @main_graph
func.func @main_graph(%arg0: index) {
%c3 = arith.constant 1 : index
// CHECK: spirv.Branch ^bb1({{.*}} : i32)
cf.br ^bb1(%arg0 : index)
// CHECK: ^bb1({{.*}}: i32): // 2 preds: ^bb0, ^bb2
^bb1(%0: index): // 2 preds: ^bb0, ^bb2
%1 = arith.cmpi slt, %0, %c3 : index
// CHECK: spirv.BranchConditional {{.*}}, ^bb2, ^bb3
cf.cond_br %1, ^bb2, ^bb3
^bb2: // pred: ^bb1
// CHECK: spirv.Branch ^bb1({{.*}} : i32)
cf.br ^bb1(%c3 : index)
^bb3: // pred: ^bb1
return
}
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