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Calls to willThrow are marked as read-none so that the optimizer can remove them. The willThrow builtin is still generated for all throw/rethrow sites, but I plan to look at this next. rdar://20356658 Swift SVN r27877
21 lines
541 B
Plaintext
21 lines
541 B
Plaintext
// RUN: %target-swift-frontend %s -O -emit-ir | FileCheck %s
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sil_stage canonical
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import Builtin
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import Swift
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enum ColorError : _ErrorType {
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case Red, Green, Blue
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}
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// CHECK-LABEL: TestCallToWillThrowCallBack
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// CHECK-NOT: call void @swift_willThrow(%swift.error* %0)
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// CHECK: ret i64 undef
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sil hidden @TestCallToWillThrowCallBack : $@convention(thin) (@owned _ErrorType) -> (Int64, @error _ErrorType) {
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bb0(%0 : $_ErrorType):
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builtin "willThrow"(%0 : $_ErrorType) : $()
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throw %0 : $_ErrorType // id: %3
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}
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