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69e4b95fb8
Although nonescaping closures are representationally trivial pointers to their on-stack context, it is useful to model them as borrowing their captures, which allows for checking correct use of move-only values across the closure, and lets us model the lifetime dependence between a closure and its captures without an ad-hoc web of `mark_dependence` instructions. During ownership elimination, We eliminate copy/destroy_value instructions and end the partial_apply's lifetime with an explicit dealloc_stack as before, for compatibility with existing IRGen and non-OSSA aware passes.
56 lines
1.5 KiB
Plaintext
56 lines
1.5 KiB
Plaintext
// RUN: %target-sil-opt -enable-sil-verify-all -closure-lifetime-fixup %s | %FileCheck %s
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sil_stage raw
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import Builtin
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import Swift
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sil @cl : $@convention(thin) (@in_guaranteed Builtin.Int64) -> ()
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sil @f : $@convention(thin) (@guaranteed @noescape @callee_guaranteed () -> ()) -> ()
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// This test case used to loop infinitely because it processed the dead block as
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// part of a dominance based algorithm.
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// CHECK: partial_apply
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sil [ossa] @repo : $@convention(thin) (Builtin.Int1, Builtin.Int1, @in_guaranteed Builtin.Int64) -> () {
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bb0(%0 : $Builtin.Int1, %1 : $Builtin.Int1, %2: $*Builtin.Int64):
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cond_br %0, bb2, bb1
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bb1:
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br bb7
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bb2:
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br bb3
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bb3:
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cond_br %1, bb4, bb5
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bb4:
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br bb8
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bb5:
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br bb8
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bb6:
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%41 = alloc_stack $Builtin.Int64
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copy_addr %2 to [init] %41 : $*Builtin.Int64
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%40 = function_ref @cl : $@convention(thin) (@in_guaranteed Builtin.Int64) -> ()
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%43 = partial_apply [callee_guaranteed] %40(%41) : $@convention(thin) (@in_guaranteed Builtin.Int64) -> ()
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%44 = convert_escape_to_noescape [not_guaranteed] %43 : $@callee_guaranteed () -> () to $@noescape @callee_guaranteed () -> ()
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%55 = function_ref @f : $@convention(thin) (@guaranteed @noescape @callee_guaranteed () -> ()) -> ()
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%56 = apply %55(%44) : $@convention(thin) (@guaranteed @noescape @callee_guaranteed () -> ()) -> ()
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destroy_value %44 : $@noescape @callee_guaranteed () -> ()
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destroy_value %43 : $@callee_guaranteed () -> ()
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dealloc_stack %41 : $*Builtin.Int64
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br bb8
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bb7:
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br bb8
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bb8:
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%r = tuple()
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return %r : $()
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}
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