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The intent for `@inline(always)` is to act as an optimization control. The user can rely on inlining to happen or the compiler will emit an error message. Because function values can be dynamic (closures, protocol/class lookup) this guarantee can only be upheld for direct function references. In cases where the optimizer can resolve dynamic function values the attribute shall be respected. rdar://148608854
29 lines
1.2 KiB
Plaintext
29 lines
1.2 KiB
Plaintext
// RUN: %target-sil-opt -enable-sil-verify-all %s -inline -dce -sil-inline-threshold=1 | %FileCheck %s
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sil_stage canonical
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import Builtin
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// CHECK-LABEL: @caller_of_noinline
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sil @caller_of_noinline : $@convention(thin) () -> () {
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bb0:
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// CHECK-NOT: function_ref @noinline_callee
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// CHECK-NOT: apply
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%0 = function_ref @noinline_callee : $@convention(thin) (Builtin.Int64) -> Builtin.Int64
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%2 = integer_literal $Builtin.Int64, 0
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%3 = apply %0(%2) : $@convention(thin) (Builtin.Int64) -> Builtin.Int64
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%4 = tuple ()
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return %4 : $()
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}
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// CHECK-LABEL: [heuristic_always_inline] @noinline_callee
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sil [heuristic_always_inline] @noinline_callee : $@convention(thin) (Builtin.Int64) -> Builtin.Int64 {
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bb0(%0 : $Builtin.Int64):
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%2 = integer_literal $Builtin.Int1, 0
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%3 = builtin "umul_with_overflow_Int64"(%0 : $Builtin.Int64, %0 : $Builtin.Int64, %2 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1)
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%4 = tuple_extract %3 : $(Builtin.Int64, Builtin.Int1), 0
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%5 = builtin "umul_with_overflow_Int64"(%4 : $Builtin.Int64, %4 : $Builtin.Int64, %2 : $Builtin.Int1) : $(Builtin.Int64, Builtin.Int1)
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%6 = tuple_extract %5 : $(Builtin.Int64, Builtin.Int1), 0
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return %6 : $Builtin.Int64
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}
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