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// RUN: mlir-opt -allow-unregistered-dialect -convert-scf-to-spirv %s -o - | FileCheck %s
module attributes {
spirv.target_env = #spirv.target_env<
#spirv.vce<v1.0, [Shader, Int64], [SPV_KHR_storage_buffer_storage_class]>, #spirv.resource_limits<>>
} {
// CHECK-LABEL: @while_loop1
func.func @while_loop1(%arg0: i32, %arg1: i32) -> i32 {
// CHECK-SAME: (%[[ARG1:.*]]: i32, %[[ARG2:.*]]: i32)
// CHECK: %[[INITVAR:.*]] = spirv.Constant 2 : i32
// CHECK: %[[VAR1:.*]] = spirv.Variable : !spirv.ptr<i32, Function>
// CHECK: spirv.mlir.loop {
// CHECK: spirv.Branch ^[[HEADER:.*]](%[[ARG1]] : i32)
// CHECK: ^[[HEADER]](%[[INDVAR1:.*]]: i32):
// CHECK: %[[CMP:.*]] = spirv.SLessThan %[[INDVAR1]], %[[ARG2]] : i32
// CHECK: spirv.Store "Function" %[[VAR1]], %[[INDVAR1]] : i32
// CHECK: spirv.BranchConditional %[[CMP]], ^[[BODY:.*]](%[[INDVAR1]] : i32), ^[[MERGE:.*]]
// CHECK: ^[[BODY]](%[[INDVAR2:.*]]: i32):
// CHECK: %[[UPDATED:.*]] = spirv.IMul %[[INDVAR2]], %[[INITVAR]] : i32
// CHECK: spirv.Branch ^[[HEADER]](%[[UPDATED]] : i32)
// CHECK: ^[[MERGE]]:
// CHECK: spirv.mlir.merge
// CHECK: }
%c2_i32 = arith.constant 2 : i32
%0 = scf.while (%arg3 = %arg0) : (i32) -> (i32) {
%1 = arith.cmpi slt, %arg3, %arg1 : i32
scf.condition(%1) %arg3 : i32
} do {
^bb0(%arg5: i32):
%1 = arith.muli %arg5, %c2_i32 : i32
scf.yield %1 : i32
}
// CHECK: %[[OUT:.*]] = spirv.Load "Function" %[[VAR1]] : i32
// CHECK: spirv.ReturnValue %[[OUT]] : i32
return %0 : i32
}
// -----
// CHECK-LABEL: @while_loop2
func.func @while_loop2(%arg0: f32) -> i64 {
// CHECK-SAME: (%[[ARG:.*]]: f32)
// CHECK: %[[VAR:.*]] = spirv.Variable : !spirv.ptr<i64, Function>
// CHECK: spirv.mlir.loop {
// CHECK: spirv.Branch ^[[HEADER:.*]](%[[ARG]] : f32)
// CHECK: ^[[HEADER]](%[[INDVAR1:.*]]: f32):
// CHECK: %[[SHARED:.*]] = "foo.shared_compute"(%[[INDVAR1]]) : (f32) -> i64
// CHECK: %[[CMP:.*]] = "foo.evaluate_condition"(%[[INDVAR1]], %[[SHARED]]) : (f32, i64) -> i1
// CHECK: spirv.Store "Function" %[[VAR]], %[[SHARED]] : i64
// CHECK: spirv.BranchConditional %[[CMP]], ^[[BODY:.*]](%[[SHARED]] : i64), ^[[MERGE:.*]]
// CHECK: ^[[BODY]](%[[INDVAR2:.*]]: i64):
// CHECK: %[[UPDATED:.*]] = "foo.payload"(%[[INDVAR2]]) : (i64) -> f32
// CHECK: spirv.Branch ^[[HEADER]](%[[UPDATED]] : f32)
// CHECK: ^[[MERGE]]:
// CHECK: spirv.mlir.merge
// CHECK: }
%res = scf.while (%arg1 = %arg0) : (f32) -> i64 {
%shared = "foo.shared_compute"(%arg1) : (f32) -> i64
%condition = "foo.evaluate_condition"(%arg1, %shared) : (f32, i64) -> i1
scf.condition(%condition) %shared : i64
} do {
^bb0(%arg2: i64):
%res = "foo.payload"(%arg2) : (i64) -> f32
scf.yield %res : f32
}
// CHECK: %[[OUT:.*]] = spirv.Load "Function" %[[VAR]] : i64
// CHECK: spirv.ReturnValue %[[OUT]] : i64
return %res : i64
}
} // end module
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