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50963451b8
DI had trouble with this pattern: %s = struct_element_addr ... %t0 = tuple_element_addr %s, 0 %t1 = tuple_element_addr %s, 1 %f = function_ref ... apply %f(%t0, %t1) This is because the NonLoadUses map only stored a single use of a tuple element per instruction, preventing instructions such as 'apply' from being able to use multiple tuple elements. In other cases where this comes up, such as with 'assign' and 'copy_addr', DI scalarizes the tuple operation by projecting each component, however clearly this can't be easily done with an 'apply'. Instead, we can get DI out of the business of scalarization, at least for instructions which are known to perform an unconditional initialization. We do this by changing the NonLoadUses map to store a vector of DIMemoryUse IDs instead of a single value.
27 lines
1.1 KiB
Plaintext
27 lines
1.1 KiB
Plaintext
// RUN: %target-sil-opt -enable-sil-verify-all %s -definite-init -raw-sil-inst-lowering
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import Builtin
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import Swift
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import SwiftShims
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struct S<T> {
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var x: (T, T)
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}
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sil [ossa] @$s19definite_init_tuple1SV1xx_xtvpfi : $@convention(thin) <T> () -> (@out T, @out T)
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sil [ossa] @$s19definite_init_tuple1SVACyxGycfC : $@convention(method) <T> (@thin S<T>.Type) -> @out S<T> {
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bb0(%0 : $*S<T>, %1 : $@thin S<T>.Type):
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%2 = alloc_box $<τ_0_0> { var S<τ_0_0> } <T>, var, name "self"
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%3 = mark_uninitialized [rootself] %2 : $<τ_0_0> { var S<τ_0_0> } <T>
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%4 = project_box %3 : $<τ_0_0> { var S<τ_0_0> } <T>, 0
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%5 = struct_element_addr %4 : $*S<T>, #S.x
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%6 = function_ref @$s19definite_init_tuple1SV1xx_xtvpfi : $@convention(thin) <τ_0_0> () -> (@out τ_0_0, @out τ_0_0)
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%7 = tuple_element_addr %5 : $*(T, T), 0
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%8 = tuple_element_addr %5 : $*(T, T), 1
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%9 = apply %6<T>(%7, %8) : $@convention(thin) <τ_0_0> () -> (@out τ_0_0, @out τ_0_0)
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copy_addr %4 to [initialization] %0 : $*S<T>
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destroy_value %3 : $<τ_0_0> { var S<τ_0_0> } <T>
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%12 = tuple ()
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return %12 : $()
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} |