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// RUN: mlir-opt -control-flow-sink %s | FileCheck %s
// Test that operations can be sunk.
// CHECK-LABEL: @test_simple_sink
// CHECK-SAME: (%[[ARG0:.*]]: i1, %[[ARG1:.*]]: i32, %[[ARG2:.*]]: i32)
// CHECK-NEXT: %[[V0:.*]] = arith.subi %[[ARG2]], %[[ARG1]]
// CHECK-NEXT: %[[V1:.*]] = test.region_if %[[ARG0]]: i1 -> i32 then {
// CHECK-NEXT: %[[V2:.*]] = arith.subi %[[ARG1]], %[[ARG2]]
// CHECK-NEXT: test.region_if_yield %[[V2]]
// CHECK-NEXT: } else {
// CHECK-NEXT: %[[V2:.*]] = arith.addi %[[ARG1]], %[[ARG1]]
// CHECK-NEXT: %[[V3:.*]] = arith.addi %[[V0]], %[[V2]]
// CHECK-NEXT: test.region_if_yield %[[V3]]
// CHECK-NEXT: } join {
// CHECK-NEXT: %[[V2:.*]] = arith.addi %[[ARG2]], %[[ARG2]]
// CHECK-NEXT: %[[V3:.*]] = arith.addi %[[V2]], %[[V0]]
// CHECK-NEXT: test.region_if_yield %[[V3]]
// CHECK-NEXT: }
// CHECK-NEXT: return %[[V1]]
func @test_simple_sink(%arg0: i1, %arg1: i32, %arg2: i32) -> i32 {
%0 = arith.subi %arg1, %arg2 : i32
%1 = arith.subi %arg2, %arg1 : i32
%2 = arith.addi %arg1, %arg1 : i32
%3 = arith.addi %arg2, %arg2 : i32
%4 = test.region_if %arg0: i1 -> i32 then {
test.region_if_yield %0 : i32
} else {
%5 = arith.addi %1, %2 : i32
test.region_if_yield %5 : i32
} join {
%5 = arith.addi %3, %1 : i32
test.region_if_yield %5 : i32
}
return %4 : i32
}
// Test that a region op can be sunk.
// CHECK-LABEL: @test_region_sink
// CHECK-SAME: (%[[ARG0:.*]]: i1, %[[ARG1:.*]]: i32, %[[ARG2:.*]]: i32)
// CHECK-NEXT: %[[V0:.*]] = test.region_if %[[ARG0]]: i1 -> i32 then {
// CHECK-NEXT: %[[V1:.*]] = test.region_if %[[ARG0]]: i1 -> i32 then {
// CHECK-NEXT: test.region_if_yield %[[ARG1]]
// CHECK-NEXT: } else {
// CHECK-NEXT: %[[V2:.*]] = arith.subi %[[ARG1]], %[[ARG2]]
// CHECK-NEXT: test.region_if_yield %[[V2]]
// CHECK-NEXT: } join {
// CHECK-NEXT: test.region_if_yield %[[ARG2]]
// CHECK-NEXT: }
// CHECK-NEXT: test.region_if_yield %[[V1]]
// CHECK-NEXT: } else {
// CHECK-NEXT: test.region_if_yield %[[ARG1]]
// CHECK-NEXT: } join {
// CHECK-NEXT: test.region_if_yield %[[ARG2]]
// CHECK-NEXT: }
// CHECK-NEXT: return %[[V0]]
func @test_region_sink(%arg0: i1, %arg1: i32, %arg2: i32) -> i32 {
%0 = arith.subi %arg1, %arg2 : i32
%1 = test.region_if %arg0: i1 -> i32 then {
test.region_if_yield %arg1 : i32
} else {
test.region_if_yield %0 : i32
} join {
test.region_if_yield %arg2 : i32
}
%2 = test.region_if %arg0: i1 -> i32 then {
test.region_if_yield %1 : i32
} else {
test.region_if_yield %arg1 : i32
} join {
test.region_if_yield %arg2 : i32
}
return %2 : i32
}
// Test that an entire subgraph can be sunk.
// CHECK-LABEL: @test_subgraph_sink
// CHECK-SAME: (%[[ARG0:.*]]: i1, %[[ARG1:.*]]: i32, %[[ARG2:.*]]: i32)
// CHECK-NEXT: %[[V0:.*]] = test.region_if %[[ARG0]]: i1 -> i32 then {
// CHECK-NEXT: %[[V1:.*]] = arith.subi %[[ARG1]], %[[ARG2]]
// CHECK-NEXT: %[[V2:.*]] = arith.addi %[[ARG1]], %[[ARG2]]
// CHECK-NEXT: %[[V3:.*]] = arith.subi %[[ARG2]], %[[ARG1]]
// CHECK-NEXT: %[[V4:.*]] = arith.muli %[[V3]], %[[V3]]
// CHECK-NEXT: %[[V5:.*]] = arith.muli %[[V2]], %[[V1]]
// CHECK-NEXT: %[[V6:.*]] = arith.addi %[[V5]], %[[V4]]
// CHECK-NEXT: test.region_if_yield %[[V6]]
// CHECK-NEXT: } else {
// CHECK-NEXT: test.region_if_yield %[[ARG1]]
// CHECK-NEXT: } join {
// CHECK-NEXT: test.region_if_yield %[[ARG2]]
// CHECK-NEXT: }
// CHECK-NEXT: return %[[V0]]
func @test_subgraph_sink(%arg0: i1, %arg1: i32, %arg2: i32) -> i32 {
%0 = arith.addi %arg1, %arg2 : i32
%1 = arith.subi %arg1, %arg2 : i32
%2 = arith.subi %arg2, %arg1 : i32
%3 = arith.muli %0, %1 : i32
%4 = arith.muli %2, %2 : i32
%5 = arith.addi %3, %4 : i32
%6 = test.region_if %arg0: i1 -> i32 then {
test.region_if_yield %5 : i32
} else {
test.region_if_yield %arg1 : i32
} join {
test.region_if_yield %arg2 : i32
}
return %6 : i32
}
// Test that ops can be sunk into regions with multiple blocks.
// CHECK-LABEL: @test_multiblock_region_sink
// CHECK-SAME: (%[[ARG0:.*]]: i1, %[[ARG1:.*]]: i32, %[[ARG2:.*]]: i32)
// CHECK-NEXT: %[[V0:.*]] = arith.addi %[[ARG1]], %[[ARG2]]
// CHECK-NEXT: %[[V1:.*]] = "test.any_cond"() ({
// CHECK-NEXT: %[[V3:.*]] = arith.addi %[[V0]], %[[ARG2]]
// CHECK-NEXT: %[[V4:.*]] = arith.addi %[[V3]], %[[ARG1]]
// CHECK-NEXT: br ^bb1(%[[V4]] : i32)
// CHECK-NEXT: ^bb1(%[[V5:.*]]: i32):
// CHECK-NEXT: %[[V6:.*]] = arith.addi %[[V5]], %[[V4]]
// CHECK-NEXT: "test.yield"(%[[V6]])
// CHECK-NEXT: })
// CHECK-NEXT: %[[V2:.*]] = arith.addi %[[V0]], %[[V1]]
// CHECK-NEXT: return %[[V2]]
func @test_multiblock_region_sink(%arg0: i1, %arg1: i32, %arg2: i32) -> i32 {
%0 = arith.addi %arg1, %arg2 : i32
%1 = arith.addi %0, %arg2 : i32
%2 = arith.addi %1, %arg1 : i32
%3 = "test.any_cond"() ({
br ^bb1(%2 : i32)
^bb1(%5: i32):
%6 = arith.addi %5, %2 : i32
"test.yield"(%6) : (i32) -> ()
}) : () -> i32
%4 = arith.addi %0, %3 : i32
return %4 : i32
}
// Test that ops can be sunk recursively into nested regions.
// CHECK-LABEL: @test_nested_region_sink
// CHECK-SAME: (%[[ARG0:.*]]: i1, %[[ARG1:.*]]: i32) -> i32 {
// CHECK-NEXT: %[[V0:.*]] = test.region_if %[[ARG0]]: i1 -> i32 then {
// CHECK-NEXT: %[[V1:.*]] = test.region_if %[[ARG0]]: i1 -> i32 then {
// CHECK-NEXT: %[[V2:.*]] = arith.addi %[[ARG1]], %[[ARG1]]
// CHECK-NEXT: test.region_if_yield %[[V2]]
// CHECK-NEXT: } else {
// CHECK-NEXT: test.region_if_yield %[[ARG1]]
// CHECK-NEXT: } join {
// CHECK-NEXT: test.region_if_yield %[[ARG1]]
// CHECK-NEXT: }
// CHECK-NEXT: test.region_if_yield %[[V1]]
// CHECK-NEXT: } else {
// CHECK-NEXT: test.region_if_yield %[[ARG1]]
// CHECK-NEXT: } join {
// CHECK-NEXT: test.region_if_yield %[[ARG1]]
// CHECK-NEXT: }
// CHECK-NEXT: return %[[V0]]
func @test_nested_region_sink(%arg0: i1, %arg1: i32) -> i32 {
%0 = arith.addi %arg1, %arg1 : i32
%1 = test.region_if %arg0: i1 -> i32 then {
%2 = test.region_if %arg0: i1 -> i32 then {
test.region_if_yield %0 : i32
} else {
test.region_if_yield %arg1 : i32
} join {
test.region_if_yield %arg1 : i32
}
test.region_if_yield %2 : i32
} else {
test.region_if_yield %arg1 : i32
} join {
test.region_if_yield %arg1 : i32
}
return %1 : i32
}
// Test that ops are only moved into the entry block, even when their only uses
// are further along.
// CHECK-LABEL: @test_not_sunk_deeply
// CHECK-SAME: (%[[ARG0:.*]]: i32) -> i32 {
// CHECK-NEXT: %[[V0:.*]] = "test.any_cond"() ({
// CHECK-NEXT: %[[V1:.*]] = arith.addi %[[ARG0]], %[[ARG0]]
// CHECK-NEXT: br ^bb1
// CHECK-NEXT: ^bb1:
// CHECK-NEXT: "test.yield"(%[[V1]]) : (i32) -> ()
// CHECK-NEXT: })
// CHECK-NEXT: return %[[V0]]
func @test_not_sunk_deeply(%arg0: i32) -> i32 {
%0 = arith.addi %arg0, %arg0 : i32
%1 = "test.any_cond"() ({
br ^bb1
^bb1:
"test.yield"(%0) : (i32) -> ()
}) : () -> i32
return %1 : i32
}
|
