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[silgen] Add explicit SILGen test for 7246806ef629915d01a278e11c9535f… #23493

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Merged
merged 1 commit into from
Mar 22, 2019
Merged

[silgen] Add explicit SILGen test for 7246806ef629915d01a278e11c9535f… #23493

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27 changes: 26 additions & 1 deletion test/SILGen/without_actually_escaping.swift
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Original file line number Diff line number Diff line change
@@ -1,4 +1,3 @@

// RUN: %target-swift-emit-silgen -module-name without_actually_escaping %s | %FileCheck %s

var escapeHatch: Any = 0
Expand Down Expand Up @@ -75,3 +74,29 @@ struct DontCrash {
}
}
}

func modifyAndPerform<T>(_ _: UnsafeMutablePointer<T>, closure: () ->()) {
closure()
}

// Make sure that we properly handle cases where the input closure is not
// trivial. This means we need to copy first.
// CHECK-LABEL: sil hidden [ossa] @$s25without_actually_escaping0A24ActuallyEscapingConflictyyF : $@convention(thin) () -> () {
// CHECK: [[CLOSURE_1_FUN:%.*]] = function_ref @$s25without_actually_escaping0A24ActuallyEscapingConflictyyFyycfU_ :
// CHECK: [[CLOSURE_1:%.*]] = partial_apply [callee_guaranteed] [[CLOSURE_1_FUN]](
// CHECK: [[BORROWED_CLOSURE_1:%.*]] = begin_borrow [[CLOSURE_1]]
// CHECK: [[COPY_BORROWED_CLOSURE_1:%.*]] = copy_value [[BORROWED_CLOSURE_1]]
// CHECK: [[THUNK_FUNC:%.*]] = function_ref @$sIeg_Ieg_TR :
// CHECK: [[COPY_2_BORROWED_CLOSURE_1:%.*]] = copy_value [[COPY_BORROWED_CLOSURE_1]]
// CHECK: [[THUNK_PA:%.*]] = partial_apply [callee_guaranteed] [[THUNK_FUNC]]([[COPY_2_BORROWED_CLOSURE_1]])
// CHECK: [[THUNK_PA_MDI:%.*]] = mark_dependence [[THUNK_PA]] : $@callee_guaranteed () -> () on [[COPY_BORROWED_CLOSURE_1]] : $@callee_guaranteed () -> ()
// CHECK: destroy_value [[THUNK_PA_MDI]]
// CHECK: destroy_value [[COPY_BORROWED_CLOSURE_1]]
// CHECK: } // end sil function '$s25without_actually_escaping0A24ActuallyEscapingConflictyyF'
func withoutActuallyEscapingConflict() {
var localVar = 0
let nestedModify = { localVar = 3 }
withoutActuallyEscaping(nestedModify) {
modifyAndPerform(&localVar, closure: $0)
}
}