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// RUN: %target-swift-frontend -O -emit-sil %s | %FileCheck %s
// Check that the optimizer can detect when an enum (e.g. Optional) is being deconstructed
// and then recreated in the same form. It should replace it with the original value in
// such cases.
sil_stage canonical
import Builtin
import Swift
import SwiftShims
public enum E {
case C1(Int32)
case C2(Int32)
case C3(Int32)
}
// CHECK-LABEL: sil @_TF10fold_enums18recreate_optional1FGSqVs5Int32_GSqS0__
// CHECK: bb0(%0 : $Optional<Int32>)
// CHECK-NOT: bb1
// CHECK: return %0 : $Optional<Int32>
sil @_TF10fold_enums18recreate_optional1FGSqVs5Int32_GSqS0__ : $@convention(thin) (Optional<Int32>) -> Optional<Int32> {
bb0(%0 : $Optional<Int32>):
debug_value %0 : $Optional<Int32>, let, name "x" // id: %1
switch_enum %0 : $Optional<Int32>, case #Optional.some!enumelt: bb1, default bb2 // id: %2
bb1(%3 : $Int32): // Preds: bb0
debug_value %3 : $Int32, let, name "y" // id: %4
%5 = enum $Optional<Int32>, #Optional.some!enumelt, %3 : $Int32 // user: %6
br bb3(%5 : $Optional<Int32>) // id: %6
bb2: // Preds: bb0
br bb3(%0 : $Optional<Int32>) // id: %7
bb3(%8 : $Optional<Int32>): // Preds: bb1 bb2
return %8 : $Optional<Int32> // id: %9
}
// CHECK-LABEL: sil @dont_fold_wrong_arg
// CHECK: bb0(%0 : $Optional<Int32>, %1 : $Int32):
// CHECK: switch_enum
// CHECK: {{^bb1.*:}}
// CHECK: enum {{.*}} %1
// CHECK: {{^bb2:}}
// CHECK: {{^bb3.*:}}
// CHECK: return
sil @dont_fold_wrong_arg : $@convention(thin) (Optional<Int32>, Int32) -> Optional<Int32> {
bb0(%0 : $Optional<Int32>, %1 : $Int32):
debug_value %0 : $Optional<Int32>
switch_enum %0 : $Optional<Int32>, case #Optional.some!enumelt: bb1, default bb2
bb1(%3 : $Int32):
debug_value %3 : $Int32
// The operand is not %3 (= the argument of this block).
%5 = enum $Optional<Int32>, #Optional.some!enumelt, %1 : $Int32
br bb3(%5 : $Optional<Int32>)
bb2:
br bb3(%0 : $Optional<Int32>)
bb3(%8 : $Optional<Int32>):
return %8 : $Optional<Int32>
}
// CHECK-LABEL: sil @_TF10fold_enums18recreate_optional2FGSqVs5Int32_GSqS0__
// CHECK: bb0(%0 : $Optional<Int32>)
// CHECK-NOT: bb1
// CHECK: return %0 : $Optional<Int32>
sil @_TF10fold_enums18recreate_optional2FGSqVs5Int32_GSqS0__ : $@convention(thin) (Optional<Int32>) -> Optional<Int32> {
bb0(%0 : $Optional<Int32>):
debug_value %0 : $Optional<Int32>, let, name "x" // id: %1
switch_enum %0 : $Optional<Int32>, case #Optional.some!enumelt: bb1, default bb2 // id: %2
bb1(%3 : $Int32): // Preds: bb0
debug_value %3 : $Int32, let, name "y" // id: %4
%5 = enum $Optional<Int32>, #Optional.some!enumelt, %3 : $Int32 // user: %6
br bb3(%5 : $Optional<Int32>) // id: %6
bb2: // Preds: bb0
%7 = alloc_stack $Optional<Int32> // users: %8, %10, %11
inject_enum_addr %7 : $*Optional<Int32>, #Optional.none!enumelt // id: %8
%9 = tuple ()
%10 = load %7 : $*Optional<Int32> // user: %12
dealloc_stack %7 : $*Optional<Int32> // id: %11
br bb3(%10 : $Optional<Int32>) // id: %12
bb3(%13 : $Optional<Int32>): // Preds: bb1 bb2
return %13 : $Optional<Int32> // id: %14
}
// CHECK-LABEL: sil @_TF10fold_enums13recreate_enumFOS_1ES0_
// CHECK: bb0(%0 : $E)
// CHECK-NOT: bb1
// CHECK: return %0 : $E
sil @_TF10fold_enums13recreate_enumFOS_1ES0_ : $@convention(thin) (E) -> E {
bb0(%0 : $E):
debug_value %0 : $E, let, name "e" // id: %1
switch_enum %0 : $E, case #E.C1!enumelt: bb1, case #E.C2!enumelt: bb2, case #E.C3!enumelt: bb3 // id: %2
bb1(%3 : $Int32): // Preds: bb0
debug_value %3 : $Int32, let, name "x" // id: %4
%5 = enum $E, #E.C1!enumelt, %3 : $Int32 // user: %6
br bb4(%5 : $E) // id: %6
bb2(%7 : $Int32): // Preds: bb0
debug_value %7 : $Int32, let, name "x" // id: %8
%9 = enum $E, #E.C2!enumelt, %7 : $Int32 // user: %10
br bb4(%9 : $E) // id: %10
bb3(%11 : $Int32): // Preds: bb0
debug_value %11 : $Int32, let, name "x" // id: %12
%13 = enum $E, #E.C3!enumelt, %11 : $Int32 // user: %14
br bb4(%13 : $E) // id: %14
bb4(%15 : $E): // Preds: bb1 bb2 bb3
return %15 : $E // id: %16
}
// CHECK-LABEL: sil @_TF10fold_enums26create_different_enum_caseFOS_1ES0_
// CHECK: bb0(%0 : $E)
// CHECK: switch_enum %0 : $E
// CHECK: bb1
// CHECK: bb2
// CHECK: bb3
// CHECK: return
sil @_TF10fold_enums26create_different_enum_caseFOS_1ES0_ : $@convention(thin) (E) -> E {
bb0(%0 : $E):
debug_value %0 : $E, let, name "e" // id: %1
switch_enum %0 : $E, case #E.C1!enumelt: bb1, case #E.C2!enumelt: bb2, case #E.C3!enumelt: bb3 // id: %2
bb1(%3 : $Int32): // Preds: bb0
debug_value %3 : $Int32, let, name "x" // id: %4
%5 = enum $E, #E.C2!enumelt, %3 : $Int32 // user: %6
br bb4(%5 : $E) // id: %6
bb2(%7 : $Int32): // Preds: bb0
debug_value %7 : $Int32, let, name "x" // id: %8
%9 = enum $E, #E.C3!enumelt, %7 : $Int32 // user: %10
br bb4(%9 : $E) // id: %10
bb3(%11 : $Int32): // Preds: bb0
debug_value %11 : $Int32, let, name "x" // id: %12
%13 = enum $E, #E.C1!enumelt, %11 : $Int32 // user: %14
br bb4(%13 : $E) // id: %14
bb4(%15 : $E): // Preds: bb1 bb2 bb3
return %15 : $E // id: %16
}
public enum F {
case F1(Int32, Int32)
case F2(Int32, String)
case F3(Float, Float, Float)
}
// CHECK-LABEL: sil {{.*}}@_TF10fold_enums13recreate_enumFOS_1FS0_
// CHECK: bb0(%0 : $F)
// CHECK-NOT: bb1
// CHECK: return %0 : $F
sil @_TF10fold_enums13recreate_enumFOS_1FS0_ : $@convention(thin) (@owned F) -> @owned F {
bb0(%0 : $F):
debug_value %0 : $F, let, name "e" // id: %1
retain_value %0 : $F // id: %2
switch_enum %0 : $F, case #F.F1!enumelt: bb1, case #F.F2!enumelt: bb2, case #F.F3!enumelt: bb3 // id: %3
bb1(%4 : $(Int32, Int32)): // Preds: bb0
%5 = tuple_extract %4 : $(Int32, Int32), 0 // users: %7, %9
%6 = tuple_extract %4 : $(Int32, Int32), 1 // users: %8, %9
debug_value %5 : $Int32, let, name "x" // id: %7
debug_value %6 : $Int32, let, name "y" // id: %8
%9 = tuple (%5 : $Int32, %6 : $Int32) // user: %10
%10 = enum $F, #F.F1!enumelt, %9 : $(Int32, Int32) // user: %11
br bb4(%10 : $F) // id: %11
bb2(%12 : $(Int32, String)): // Preds: bb0
%13 = tuple_extract %12 : $(Int32, String), 0 // users: %15, %18
%14 = tuple_extract %12 : $(Int32, String), 1 // users: %16, %17, %18, %20
debug_value %13 : $Int32, let, name "x" // id: %15
debug_value %14 : $String, let, name "y" // id: %16
retain_value %14 : $String // id: %17
%18 = tuple (%13 : $Int32, %14 : $String) // user: %19
%19 = enum $F, #F.F2!enumelt, %18 : $(Int32, String) // user: %21
release_value %14 : $String // id: %20
br bb4(%19 : $F) // id: %21
bb3(%22 : $(Float, Float, Float)): // Preds: bb0
%23 = tuple_extract %22 : $(Float, Float, Float), 0 // users: %26, %29
%24 = tuple_extract %22 : $(Float, Float, Float), 1 // users: %27, %29
%25 = tuple_extract %22 : $(Float, Float, Float), 2 // users: %28, %29
debug_value %23 : $Float, let, name "x" // id: %26
debug_value %24 : $Float, let, name "y" // id: %27
debug_value %25 : $Float, let, name "z" // id: %28
%29 = tuple (%23 : $Float, %24 : $Float, %25 : $Float) // user: %30
%30 = enum $F, #F.F3!enumelt, %29 : $(Float, Float, Float) // user: %31
br bb4(%30 : $F) // id: %31
bb4(%32 : $F): // Preds: bb1 bb2 bb3
release_value %0 : $F // id: %33
return %32 : $F // id: %34
}
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