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35097b5a71
Replace `unconditional_checked_cast` to an existential metatype with an `init_existential_metatype`, it the source is a conforming type. Note that init_existential_metatype is better than unconditional_checked_cast because it does not need to do any runtime casting.
55 lines
1.8 KiB
Plaintext
55 lines
1.8 KiB
Plaintext
// RUN: %target-sil-opt -enable-sil-verify-all %s -simplification -simplify-instruction=unconditional_checked_cast | %FileCheck %s
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import Swift
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import Builtin
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protocol P {}
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protocol PC: AnyObject {}
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struct S : P {}
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struct T {}
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class C {}
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// CHECK-LABEL: sil [ossa] @test_conforming_struct :
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// CHECK: %1 = init_existential_metatype %0, $@thick any P.Type
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// CHECK-NEXT: return %1
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// CHECK: } // end sil function 'test_conforming_struct'
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sil [ossa] @test_conforming_struct : $@convention(thin) (@thick S.Type) -> @thick any P.Type {
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bb0(%0 : $@thick S.Type):
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%1 = unconditional_checked_cast %0 to any P.Type
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return %1
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}
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// CHECK-LABEL: sil [ossa] @test_non_conforming_struct :
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// CHECK: %1 = unconditional_checked_cast %0
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// CHECK-NEXT: return %1
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// CHECK: } // end sil function 'test_non_conforming_struct'
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sil [ossa] @test_non_conforming_struct : $@convention(thin) (@thick T.Type) -> @thick any P.Type {
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bb0(%0 : $@thick T.Type):
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%1 = unconditional_checked_cast %0 to any P.Type
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return %1
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}
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// CHECK-LABEL: sil [ossa] @test_non_metatype :
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// CHECK: %1 = unconditional_checked_cast %0
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// CHECK-NEXT: return %1
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// CHECK: } // end sil function 'test_non_metatype'
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sil [ossa] @test_non_metatype : $@convention(thin) (@guaranteed C) -> any PC {
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bb0(%0 : @guaranteed $C):
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%1 = unconditional_checked_cast %0 to any PC
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return %1
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}
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// CHECK-LABEL: sil [ossa] @test_non_existential_target :
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// CHECK: %1 = unconditional_checked_cast %0
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// CHECK-NEXT: return %1
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// CHECK: } // end sil function 'test_non_existential_target'
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sil [ossa] @test_non_existential_target : $@convention(thin) (@thick S.Type) -> @thick Int.Type {
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bb0(%0 : $@thick S.Type):
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%1 = unconditional_checked_cast %0 to Int.Type
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return %1
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}
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