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|
// RUN: %target-swift-emit-silgen -module-name if_while_binding -Xllvm -sil-full-demangle %s | %FileCheck %s
func foo() -> String? { return "" }
func bar() -> String? { return "" }
func a(_ x: String) {}
func b(_ x: String) {}
func c(_ x: String) {}
func marker_1() {}
func marker_2() {}
func marker_3() {}
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding0A8_no_else{{[_0-9a-zA-Z]*}}F
func if_no_else() {
// CHECK: [[FOO:%.*]] = function_ref @$s16if_while_binding3fooSSSgyF
// CHECK: [[OPT_RES:%.*]] = apply [[FOO]]()
// CHECK: switch_enum [[OPT_RES]] : $Optional<String>, case #Optional.some!enumelt: [[YES:bb[0-9]+]], case #Optional.none!enumelt: [[NO:bb[0-9]+]]
//
// CHECK: [[NO]]:
// CHECK: br [[CONT:bb[0-9]+]]
if let x = foo() {
// CHECK: [[YES]]([[VAL:%[0-9]+]] : @owned $String):
// CHECK: [[MOVED_VAL:%.*]] = move_value [var_decl] [[VAL]]
// CHECK: [[BORROWED_VAL:%.*]] = begin_borrow [[MOVED_VAL]]
// CHECK: [[A:%.*]] = function_ref @$s16if_while_binding1a
// CHECK: apply [[A]]([[BORROWED_VAL]])
// CHECK: end_borrow [[BORROWED_VAL]]
// CHECK: destroy_value [[MOVED_VAL]]
// CHECK: br [[CONT]]
a(x)
}
// CHECK: [[CONT]]:
// CHECK-NEXT: tuple ()
}
// CHECK: } // end sil function '$s16if_while_binding0A8_no_else{{[_0-9a-zA-Z]*}}F'
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding0A11_else_chainyyF : $@convention(thin) () -> () {
func if_else_chain() {
// CHECK: [[FOO:%.*]] = function_ref @$s16if_while_binding3foo{{[_0-9a-zA-Z]*}}F
// CHECK-NEXT: [[OPT_RES:%.*]] = apply [[FOO]]()
// CHECK-NEXT: switch_enum [[OPT_RES]] : $Optional<String>, case #Optional.some!enumelt: [[YESX:bb[0-9]+]], case #Optional.none!enumelt: [[NOX:bb[0-9]+]]
if let x = foo() {
// CHECK: [[YESX]]([[VAL:%[0-9]+]] : @owned $String):
// CHECK: [[MOVED_VAL:%.*]] = move_value [var_decl] [[VAL]]
// CHECK: debug_value [[MOVED_VAL]] : $String, let, name "x"
// CHECK: [[BORROWED_VAL:%.*]] = begin_borrow [[MOVED_VAL]]
// CHECK: [[A:%.*]] = function_ref @$s16if_while_binding1a
// CHECK: apply [[A]]([[BORROWED_VAL]])
// CHECK: end_borrow [[BORROWED_VAL]]
// CHECK: destroy_value [[MOVED_VAL]]
// CHECK: br [[CONT_X:bb[0-9]+]]
a(x)
//
// CHECK: [[NOX]]:
// CHECK: alloc_box ${ var String }, var, name "y"
// CHECK: switch_enum {{.*}} : $Optional<String>, case #Optional.some!enumelt: [[YESY:bb[0-9]+]], case #Optional.none!enumelt: [[ELSE:bb[0-9]+]]
} else if var y = bar() {
// CHECK: [[YESY]]([[VAL:%[0-9]+]] : @owned $String):
// CHECK: br [[CONT_Y:bb[0-9]+]]
b(y)
} else {
// CHECK: [[ELSE]]:
// CHECK: dealloc_box {{.*}} ${ var String }
// CHECK: function_ref if_while_binding.c
c("")
// CHECK: br [[CONT_Y]]
}
// CHECK: [[CONT_Y]]:
// br [[CONT_X]]
// CHECK: [[CONT_X]]:
}
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding0B5_loopyyF : $@convention(thin) () -> () {
func while_loop() {
// CHECK: br [[LOOP_ENTRY:bb[0-9]+]]
//
// CHECK: [[LOOP_ENTRY]]:
// CHECK: switch_enum {{.*}} : $Optional<String>, case #Optional.some!enumelt: [[LOOP_BODY:bb[0-9]+]], case #Optional.none!enumelt: [[NO_TRAMPOLINE:bb[0-9]+]]
//
// CHECK: [[NO_TRAMPOLINE]]:
// CHECK: br [[LOOP_EXIT:bb[0-9]+]]
while let x = foo() {
// CHECK: [[LOOP_BODY]]([[X:%[0-9]+]] : @owned $String):
// CHECK: [[MOVED_X:%.*]] = move_value [var_decl] [[X]]
// CHECK: switch_enum {{.*}} : $Optional<String>, case #Optional.some!enumelt: [[YES:bb[0-9]+]], case #Optional.none!enumelt: [[FAILURE_DEST_2:bb[0-9]+]]
if let y = bar() {
// CHECK: [[YES]]([[Y:%[0-9]+]] : @owned $String):
// CHECK: [[MOVED_Y:%.*]] = move_value [var_decl] [[Y]]
a(y)
break
// CHECK: destroy_value [[MOVED_Y]]
// CHECK: destroy_value [[MOVED_X]]
// CHECK: br [[LOOP_EXIT]]
}
// CHECK: [[FAILURE_DEST_2]]:
// CHECK: destroy_value [[MOVED_X]]
// CHECK: br [[LOOP_ENTRY]]
}
// CHECK: [[LOOP_EXIT]]:
// CHECK-NEXT: tuple ()
// CHECK-NEXT: return
}
// Don't leak alloc_stacks for address-only conditional bindings in 'while'.
// <rdar://problem/16202294>
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding0B13_loop_generic{{[_0-9a-zA-Z]*}}F
// CHECK: br [[COND:bb[0-9]+]]
// CHECK: [[COND]]:
// CHECK: [[X:%.*]] = alloc_stack [lexical] [var_decl] $T, let, name "x"
// CHECK: [[OPTBUF:%[0-9]+]] = alloc_stack $Optional<T>
// CHECK: switch_enum_addr {{.*}}, case #Optional.some!enumelt: [[LOOPBODY:bb.*]], case #Optional.none!enumelt: [[OUT:bb[0-9]+]]
// CHECK: [[LOOPBODY]]:
// CHECK: [[ENUMVAL:%.*]] = unchecked_take_enum_data_addr
// CHECK: copy_addr [take] [[ENUMVAL]] to [init] [[X]]
// CHECK: destroy_addr [[X]]
// CHECK: dealloc_stack [[X]]
// CHECK: br [[COND]]
// CHECK: [[OUT]]:
// CHECK: dealloc_stack [[OPTBUF]]
// CHECK: dealloc_stack [[X]]
// CHECK: return
// CHECK: } // end sil function '$s16if_while_binding0B13_loop_generic{{[_0-9a-zA-Z]*}}F'
func while_loop_generic<T>(_ source: () -> T?) {
while let x = source() {
}
}
// <rdar://problem/19382942> Improve 'if let' to avoid optional pyramid of doom
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding0B11_loop_multiyyF
func while_loop_multi() {
// CHECK: br [[LOOP_ENTRY:bb[0-9]+]]
// CHECK: [[LOOP_ENTRY]]:
// CHECK: switch_enum {{.*}}, case #Optional.some!enumelt: [[CHECKBUF2:bb.*]], case #Optional.none!enumelt: [[NONE_TRAMPOLINE:bb[0-9]+]]
//
// CHECK: [[NONE_TRAMPOLINE]]:
// CHECK: br [[LOOP_EXIT0:bb[0-9]+]]
// CHECK: [[CHECKBUF2]]([[A:%[0-9]+]] : @owned $String):
// CHECK: [[MOVED_A:%.*]] = move_value [var_decl] [[A]]
// CHECK: debug_value [[MOVED_A]] : $String, let, name "a"
// CHECK: switch_enum {{.*}}, case #Optional.some!enumelt: [[LOOP_BODY:bb.*]], case #Optional.none!enumelt: [[LOOP_EXIT2a:bb[0-9]+]]
// CHECK: [[LOOP_EXIT2a]]:
// CHECK: destroy_value [[MOVED_A]]
// CHECK: br [[LOOP_EXIT0]]
// CHECK: [[LOOP_BODY]]([[B:%[0-9]+]] : @owned $String):
// CHECK: [[MOVED_B:%.*]] = move_value [var_decl] [[B]]
// CHECK: debug_value [[MOVED_B]] : $String, let, name "b"
while let a = foo(), let b = bar() {
// CHECK: [[AL:%.*]] = begin_borrow [[MOVED_A]]
// CHECK: [[A_COPY:%.*]] = copy_value [[AL]]
// CHECK: [[MOVED_C:%.*]] = move_value [var_decl] [[A_COPY]]
// CHECK: debug_value [[MOVED_C]] : $String, let, name "c"
// CHECK: destroy_value [[MOVED_C]]
// CHECK: destroy_value [[MOVED_B]]
// CHECK: destroy_value [[MOVED_A]]
// CHECK: br [[LOOP_ENTRY]]
let c = a
}
// CHECK: [[LOOP_EXIT0]]:
// CHECK-NEXT: tuple ()
// CHECK-NEXT: return
}
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding0A6_multiyyF
func if_multi() {
// CHECK: switch_enum {{.*}}, case #Optional.some!enumelt: [[CHECKBUF2:bb.*]], case #Optional.none!enumelt: [[NONE_TRAMPOLINE:bb[0-9]+]]
//
// CHECK: [[NONE_TRAMPOLINE]]:
// CHECK: br [[IF_DONE:bb[0-9]+]]
// CHECK: [[CHECKBUF2]]([[A:%[0-9]+]] : @owned $String):
// CHECK: [[MOVED_A:%.*]] = move_value [var_decl] [[A]]
// CHECK: debug_value [[MOVED_A]] : $String, let, name "a"
// CHECK: [[B:%[0-9]+]] = alloc_box ${ var String }, var, name "b"
// CHECK: [[BL:%[0-9]+]] = begin_borrow [var_decl] [[B]]
// CHECK: [[PB:%[0-9]+]] = project_box [[BL]]
// CHECK: switch_enum {{.*}}, case #Optional.some!enumelt: [[IF_BODY:bb.*]], case #Optional.none!enumelt: [[IF_EXIT1a:bb[0-9]+]]
// CHECK: [[IF_EXIT1a]]:
// CHECK: dealloc_box {{.*}} ${ var String }
// CHECK: destroy_value [[MOVED_A]]
// CHECK: br [[IF_DONE]]
// CHECK: [[IF_BODY]]([[BVAL:%[0-9]+]] : @owned $String):
if let a = foo(), var b = bar() {
// CHECK: store [[BVAL]] to [init] [[PB]] : $*String
// CHECK: debug_value {{.*}} : $String, let, name "c"
// CHECK: destroy_value [[B]]
// CHECK: destroy_value [[MOVED_A]]
// CHECK: br [[IF_DONE]]
let c = a
}
// CHECK: [[IF_DONE]]:
// CHECK-NEXT: tuple ()
// CHECK-NEXT: return
}
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding0A11_multi_elseyyF
func if_multi_else() {
// CHECK: switch_enum {{.*}}, case #Optional.some!enumelt: [[CHECKBUF2:bb.*]], case #Optional.none!enumelt: [[NONE_TRAMPOLINE:bb[0-9]+]]
//
// CHECK: [[NONE_TRAMPOLINE]]:
// CHECK: br [[ELSE:bb[0-9]+]]
// CHECK: [[CHECKBUF2]]([[A:%[0-9]+]] : @owned $String):
// CHECK: [[MOVED_A:%.*]] = move_value [var_decl] [[A]]
// CHECK: debug_value [[MOVED_A]] : $String, let, name "a"
// CHECK: [[B:%[0-9]+]] = alloc_box ${ var String }, var, name "b"
// CHECK: [[BL:%[0-9]+]] = begin_borrow [var_decl] [[B]]
// CHECK: [[PB:%[0-9]+]] = project_box [[BL]]
// CHECK: switch_enum {{.*}}, case #Optional.some!enumelt: [[IF_BODY:bb.*]], case #Optional.none!enumelt: [[IF_EXIT1a:bb[0-9]+]]
// CHECK: [[IF_EXIT1a]]:
// CHECK: dealloc_box {{.*}} ${ var String }
// CHECK: destroy_value [[MOVED_A]]
// CHECK: br [[ELSE]]
// CHECK: [[IF_BODY]]([[BVAL:%[0-9]+]] : @owned $String):
if let a = foo(), var b = bar() {
// CHECK: store [[BVAL]] to [init] [[PB]] : $*String
// CHECK: debug_value {{.*}} : $String, let, name "c"
// CHECK: destroy_value [[B]]
// CHECK: destroy_value [[MOVED_A]]
// CHECK: br [[IF_DONE:bb[0-9]+]]
let c = a
} else {
let d = 0
// CHECK: [[ELSE]]:
// CHECK: debug_value {{.*}} : $Int, let, name "d"
// CHECK: br [[IF_DONE]]
}
// CHECK: [[IF_DONE]]:
// CHECK-NEXT: tuple ()
// CHECK-NEXT: return
}
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding0A12_multi_whereyyF
func if_multi_where() {
// CHECK: switch_enum {{.*}}, case #Optional.some!enumelt: [[CHECKBUF2:bb.*]], case #Optional.none!enumelt: [[NONE_TRAMPOLINE:bb[0-9]+]]
//
// CHECK: [[NONE_TRAMPOLINE]]:
// CHECK: br [[DONE:bb[0-9]+]]
// CHECK: [[CHECKBUF2]]([[A:%[0-9]+]] : @owned $String):
// CHECK: [[MOVED_A:%.*]] = move_value [var_decl] [[A]]
// CHECK: debug_value [[MOVED_A]] : $String, let, name "a"
// CHECK: [[BBOX:%[0-9]+]] = alloc_box ${ var String }, var, name "b"
// CHECK: [[PL:%[0-9]+]] = begin_borrow [var_decl] [[BBOX]]
// CHECK: [[PB:%[0-9]+]] = project_box [[PL]]
// CHECK: switch_enum {{.*}}, case #Optional.some!enumelt: [[CHECK_WHERE:bb.*]], case #Optional.none!enumelt: [[IF_EXIT1a:bb[0-9]+]]
// CHECK: [[IF_EXIT1a]]:
// CHECK: dealloc_box {{.*}} ${ var String }
// CHECK: destroy_value [[MOVED_A]]
// CHECK: br [[DONE]]
// CHECK: [[CHECK_WHERE]]([[B:%[0-9]+]] : @owned $String):
// CHECK: struct_extract {{.*}}
// CHECK: cond_br {{.*}}, [[IF_BODY:bb[0-9]+]], [[IF_EXIT3:bb[0-9]+]]
if let a = foo(), var b = bar(), a == b {
// CHECK: [[IF_BODY]]:
// CHECK: destroy_value [[BBOX]]
// CHECK: destroy_value [[MOVED_A]]
// CHECK: br [[DONE]]
let c = a
}
// CHECK: [[IF_EXIT3]]:
// CHECK: destroy_value [[BBOX]]
// CHECK: destroy_value [[MOVED_A]]
// CHECK: br [[DONE]]
// CHECK: [[DONE]]:
// CHECK-NEXT: tuple ()
// CHECK-NEXT: return
}
// <rdar://problem/19797158> Swift 1.2's "if" has 2 behaviors. They could be unified.
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding0A16_leading_booleanyySiF
func if_leading_boolean(_ a : Int) {
// Test the boolean condition.
// CHECK: debug_value %0 : $Int, let, name "a"
// CHECK: [[EQRESULT:%[0-9]+]] = apply {{.*}}(%0, %0{{.*}}) : $@convention({{.*}}) (Int, Int{{.*}}) -> Bool
// CHECK: [[EQRESULTI1:%[0-9]+]] = struct_extract {{.*}} : $Bool, #Bool._value
// CHECK-NEXT: cond_br [[EQRESULTI1]], [[CHECKFOO:bb[0-9]+]], [[ELSE:bb[0-9]+]]
// Call Foo and test for the optional being present.
// CHECK: [[CHECKFOO]]:
// CHECK: [[OPTRESULT:%[0-9]+]] = apply {{.*}}() : $@convention(thin) () -> @owned Optional<String>
// CHECK: switch_enum [[OPTRESULT]] : $Optional<String>, case #Optional.some!enumelt: [[SUCCESS:bb.*]], case #Optional.none!enumelt: [[IFDONE:bb[0-9]+]]
// CHECK: [[SUCCESS]]([[B:%[0-9]+]] : @owned $String):
// CHECK: [[MOVED_B:%.*]] = move_value [var_decl] [[B]]
// CHECK: debug_value [[MOVED_B]] : $String, let, name "b"
// CHECK: [[BB:%.*]] = begin_borrow [[MOVED_B]]
// CHECK: [[C:%.*]] = copy_value [[BB]]
// CHECK: [[MOVED_C:%.*]] = move_value [var_decl] [[C]]
// CHECK: debug_value [[MOVED_C]] : $String, let, name "c"
// CHECK: destroy_value [[MOVED_C]]
// CHECK: destroy_value [[MOVED_B]]
// CHECK: br [[IFDONE:bb[0-9]+]]
if a == a, let b = foo() {
let c = b
}
// CHECK: [[ELSE]]:
// CHECK: br [[IFDONE]]
// CHECK: [[IFDONE]]:
// CHECK-NEXT: tuple ()
}
/// <rdar://problem/20364869> Assertion failure when using 'as' pattern in 'if let'
class BaseClass {}
class DerivedClass : BaseClass {}
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding20testAsPatternInIfLetyyAA9BaseClassCSgF
func testAsPatternInIfLet(_ a : BaseClass?) {
// CHECK: bb0([[ARG:%.*]] : @guaranteed $Optional<BaseClass>):
// CHECK: debug_value [[ARG]] : $Optional<BaseClass>, let, name "a"
// CHECK: [[ARG_COPY:%.*]] = copy_value [[ARG]] : $Optional<BaseClass>
// CHECK: switch_enum [[ARG_COPY]] : $Optional<BaseClass>, case #Optional.some!enumelt: [[OPTPRESENTBB:bb[0-9]+]], case #Optional.none!enumelt: [[NILBB:bb[0-9]+]]
// CHECK: [[NILBB]]:
// CHECK: br [[EXITBB:bb[0-9]+]]
// CHECK: [[OPTPRESENTBB]]([[CLS:%.*]] : @owned $BaseClass):
// CHECK: checked_cast_br BaseClass in [[CLS]] : $BaseClass to DerivedClass, [[ISDERIVEDBB:bb[0-9]+]], [[ISBASEBB:bb[0-9]+]]
// CHECK: [[ISDERIVEDBB]]([[DERIVED_CLS:%.*]] : @owned $DerivedClass):
// CHECK: [[DERIVED_CLS_SOME:%.*]] = enum $Optional<DerivedClass>, #Optional.some!enumelt, [[DERIVED_CLS]] : $DerivedClass
// CHECK: br [[MERGE:bb[0-9]+]]([[DERIVED_CLS_SOME]] : $Optional<DerivedClass>)
// CHECK: [[ISBASEBB]]([[BASECLASS:%.*]] : @owned $BaseClass):
// CHECK: destroy_value [[BASECLASS]] : $BaseClass
// CHECK: = enum $Optional<DerivedClass>, #Optional.none!enumelt
// CHECK: br [[MERGE]](
// CHECK: [[MERGE]]([[OPTVAL:%[0-9]+]] : @owned $Optional<DerivedClass>):
// CHECK: switch_enum [[OPTVAL]] : $Optional<DerivedClass>, case #Optional.some!enumelt: [[ISDERIVEDBB:bb[0-9]+]], case #Optional.none!enumelt: [[NILBB:bb[0-9]+]]
// CHECK: [[ISDERIVEDBB]]([[DERIVEDVAL:%[0-9]+]] : @owned $DerivedClass):
// CHECK: [[MOVED_DERIVED_VAL:%.*]] = move_value [lexical] [var_decl] [[DERIVEDVAL]]
// CHECK: debug_value [[MOVED_DERIVED_VAL]] : $DerivedClass
// => SEMANTIC SIL TODO: This is benign, but scoping wise, this end borrow should be after derived val.
// CHECK: destroy_value [[MOVED_DERIVED_VAL]] : $DerivedClass
// CHECK: br [[EXITBB]]
// CHECK: [[EXITBB]]:
// CHECK: tuple ()
// CHECK: return
if case let b as DerivedClass = a {
}
}
// <rdar://problem/22312114> if case crashes swift - bools not supported in let/else yet
// CHECK-LABEL: sil hidden [ossa] @$s16if_while_binding12testCaseBoolyySbSgF
func testCaseBool(_ value : Bool?) {
// CHECK: bb0([[ARG:%.*]] : $Optional<Bool>):
// CHECK: switch_enum [[ARG]] : $Optional<Bool>, case #Optional.some!enumelt: [[SOME_BB:bb[0-9]+]], case #Optional.none!enumelt: [[NONE_TRAMPOLINE:bb[0-9]+]]
//
// CHECK: [[NONE_TRAMPOLINE]]:
// CHECK: br [[CONT_BB:bb[0-9]+]]
//
// CHECK: [[SOME_BB]]([[PAYLOAD:%.*]] : $Bool):
// CHECK: [[ISTRUE:%[0-9]+]] = struct_extract [[PAYLOAD]] : $Bool, #Bool._value
// CHECK: cond_br [[ISTRUE]], [[TRUE_BB:bb[0-9]+]], [[FALSE_TRAMPOLINE:bb[0-9]+]]
// CHECK: [[FALSE_TRAMPOLINE]]:
// CHECK: br [[CONT_BB]]
// CHECK: [[TRUE_BB]]:
// CHECK: function_ref @$s16if_while_binding8marker_1yyF
// CHECK: br [[CONT_BB]]
if case true? = value {
marker_1()
}
// CHECK: [[CONT_BB]]:
// CHECK: switch_enum [[ARG]] : $Optional<Bool>, case #Optional.some!enumelt: [[SUCC_BB_2:bb[0-9]+]], case #Optional.none!enumelt: [[NO_TRAMPOLINE_2:bb[0-9]+]]
// CHECK: [[NO_TRAMPOLINE_2]]:
// CHECK: br [[EPILOG_BB:bb[0-9]+]]
// CHECK: [[SUCC_BB_2]]([[PAYLOAD2:%.*]] : $Bool):
// CHECK: [[ISTRUE:%[0-9]+]] = struct_extract [[PAYLOAD2]] : $Bool, #Bool._value
// CHECK: cond_br [[ISTRUE]], [[TRUE3_BB:bb[0-9]+]], [[FALSE2_BB:bb[0-9]+]]
// CHECK: [[TRUE3_BB]]:
// CHECK: br [[EPILOG_BB:bb[0-9]+]]
//
// CHECK: [[FALSE2_BB]]:
// CHECK: function_ref @$s16if_while_binding8marker_2yyF
// CHECK: br [[EPILOG_BB]]
// CHECK: [[EPILOG_BB]]:
// CHECK: return
if case false? = value {
marker_2()
}
}
|
