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// RUN: %target-sil-opt -enable-sil-verify-all %s -allocbox-to-stack -enable-lexical-lifetimes | %FileCheck %s
sil_stage raw
import Builtin
struct Int {
var _value: Builtin.Int64
}
struct Bool {
var _value: Builtin.Int1
}
protocol Error {}
// CHECK-LABEL: sil [ossa] @promote_nonlexical
// CHECK: alloc_stack $
// CHECK-NOT: alloc_box
// CHECK-NOT: destroy_value
// CHECK: return
// CHECK-LABEL: } // end sil function 'promote_nonlexical'
sil [ossa] @promote_nonlexical : $@convention(thin) (Int) -> Int {
bb0(%0 : $Int):
%1 = alloc_box ${ var Int }
%1a = project_box %1 : ${ var Int }, 0
store %0 to [trivial] %1a : $*Int
%3 = load [trivial] %1a : $*Int
destroy_value %1 : ${ var Int }
return %3 : $Int
}
// CHECK-LABEL: sil [ossa] @promote_lexical
// CHECK: alloc_stack [lexical]
// CHECK-NOT: alloc_box
// CHECK-NOT: destroy_value
// CHECK: return
// CHECK-LABEL: } // end sil function 'promote_lexical'
sil [ossa] @promote_lexical : $@convention(thin) (Int) -> Int {
bb0(%0 : $Int):
%1 = alloc_box ${ var Int }
%b = begin_borrow [lexical] %1 : ${ var Int }
%1a = project_box %b : ${ var Int }, 0
store %0 to [trivial] %1a : $*Int
%3 = load [trivial] %1a : $*Int
end_borrow %b : ${ var Int }
destroy_value %1 : ${ var Int }
return %3 : $Int
}
// CHECK-LABEL: sil [ossa] @keep_dead_end : {{.*}} {
// CHECK: [[STACK:%[^,]+]] = alloc_stack
// CHECK: cond_br undef, [[DIE:bb[0-9]+]]
// CHECK: [[DIE]]:
// CHECK-NEXT: unreachable
// CHECK-LABEL: } // end sil function 'keep_dead_end'
sil [ossa] @keep_dead_end : $@convention(thin) () -> () {
bb0:
%b = alloc_box ${ var Int }
cond_br undef, die, exit
die:
dealloc_box [dead_end] %b : ${ var Int }
unreachable
exit:
dealloc_box %b : ${ var Int }
%retval = tuple ()
return %retval : $()
}
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