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453529b8bf
register a DestroyLocalVariable cleanup: it will be a noop. Getting it out of the apparently active set of cleanups allows us to avoid emitting empty blocks in some cases. Swift SVN r27049
137 lines
3.5 KiB
Swift
137 lines
3.5 KiB
Swift
// RUN: %target-swift-frontend -emit-silgen %s | FileCheck %s
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// Some fake predicates for pattern guards.
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func runced() -> Bool { return true }
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func funged() -> Bool { return true }
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func ansed() -> Bool { return true }
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func foo() -> Int { return 0 }
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func bar() -> Int { return 0 }
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func a() {}
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func b() {}
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func c() {}
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func d() {}
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func e() {}
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func f() {}
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func g() {}
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// CHECK-LABEL: sil hidden @_TF18switch_fallthrough5test1FT_T_
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func test1() {
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switch foo() {
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// CHECK: cond_br {{%.*}}, [[YES_CASE1:bb[0-9]+]], {{bb[0-9]+}}
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// CHECK: [[YES_CASE1]]:
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case foo():
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// CHECK: function_ref @_TF18switch_fallthrough1aFT_T_
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// CHECK: br [[CASE2:bb[0-9]+]]
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a()
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fallthrough
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case bar():
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// CHECK: [[CASE2]]:
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// CHECK: function_ref @_TF18switch_fallthrough1bFT_T_
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// CHECK: br [[CASE3:bb[0-9]+]]
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b()
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fallthrough
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case _:
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// CHECK: [[CASE3]]:
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// CHECK: function_ref @_TF18switch_fallthrough1cFT_T_
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// CHECK: br [[CONT:bb[0-9]+]]
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c()
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}
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// CHECK: [[CONT]]:
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// CHECK: function_ref @_TF18switch_fallthrough1dFT_T_
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d()
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}
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// Fallthrough should work even if the next case is normally unreachable
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// CHECK-LABEL: sil hidden @_TF18switch_fallthrough5test2FT_T_
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func test2() {
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switch foo() {
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// CHECK: cond_br {{%.*}}, [[YES_CASE1:bb[0-9]+]], {{bb[0-9]+}}
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// CHECK: [[YES_CASE1]]:
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case foo():
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// CHECK: function_ref @_TF18switch_fallthrough1aFT_T_
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// CHECK: br [[CASE2:bb[0-9]+]]
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a()
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fallthrough
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case _:
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// CHECK: [[CASE2]]:
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// CHECK: function_ref @_TF18switch_fallthrough1bFT_T_
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// CHECK: br [[CASE3:bb[0-9]+]]
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b()
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fallthrough
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case _:
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// CHECK: [[CASE3]]:
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// CHECK: function_ref @_TF18switch_fallthrough1cFT_T_
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// CHECK: br [[CONT:bb[0-9]+]]
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c()
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}
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// CHECK: [[CONT]]:
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// CHECK: function_ref @_TF18switch_fallthrough1dFT_T_
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d()
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}
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// CHECK-LABEL: sil hidden @_TF18switch_fallthrough5test3FT_T_
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func test3() {
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switch (foo(), bar()) {
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// CHECK: cond_br {{%.*}}, [[YES_CASE1:bb[0-9]+]], {{bb[0-9]+}}
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// CHECK: [[YES_CASE1]]:
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case (foo(), bar()):
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// CHECK: function_ref @_TF18switch_fallthrough1aFT_T_
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// CHECK: br [[CASE2:bb[0-9]+]]
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a()
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fallthrough
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case (foo(), _):
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// CHECK: [[CASE2]]:
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// CHECK: function_ref @_TF18switch_fallthrough1bFT_T_
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// CHECK: br [[CASE3:bb[0-9]+]]
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b()
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fallthrough
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case (_, _):
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// CHECK: [[CASE3]]:
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// CHECK: function_ref @_TF18switch_fallthrough1cFT_T_
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// CHECK: br [[CASE4:bb[0-9]+]]
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c()
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fallthrough
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case (_, _):
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// CHECK: [[CASE4]]:
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// CHECK: function_ref @_TF18switch_fallthrough1dFT_T_
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// CHECK: br [[CONT:bb[0-9]+]]
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d()
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}
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// CHECK: [[CONT]]:
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// CHECK: function_ref @_TF18switch_fallthrough1eFT_T_
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e()
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}
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// Fallthrough should clean up nested pattern variables from the exited scope.
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func test4() {
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switch (foo(), bar()) {
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// CHECK: [[A:%.*]] = alloc_box $(Int, Int)
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// CHECK: cond_br {{%.*}}, [[CASE1:bb[0-9]+]], {{bb[0-9]+}}
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case var a where runced():
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// CHECK: [[CASE1]]:
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// CHECK: br [[CASE2:bb[0-9]+]]
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fallthrough
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case _ where funged():
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// CHECK: [[CASE2]]:
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// CHECK: br [[CONT:bb[0-9]+]]
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()
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// CHECK: [[B:%.*]] = alloc_box $Int
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// CHECK: [[C:%.*]] = alloc_box $Int
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// CHECK: cond_br {{%.*}}, [[CASE4:bb[0-9]+]],
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case (var b, var c) where ansed():
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// CHECK: [[CASE4]]:
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// CHECK: br [[CASE5:bb[0-9]+]]
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fallthrough
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case _:
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// CHECK: [[CASE5]]:
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// CHECK: br [[CONT]]
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()
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}
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// CHECK: [[CONT]]:
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// CHECK-NEXT: tuple ()
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// CHECK-NEXT: return
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}
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