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7753b0fa78
When computing an access path, if a struct with unreferenceable storage is encountered, bail out. Otherwise, an attempt will be made to construct such a struct via the struct instruction which isn't possible. rdar://127013278
50 lines
1.6 KiB
Plaintext
50 lines
1.6 KiB
Plaintext
// RUN: %target-sil-opt -enable-sil-verify-all %s -licm | %FileCheck %s
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// REQUIRES: objc_interop
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//--- input.sil
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sil_stage canonical
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import Builtin
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import Swift
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import Foundation
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typealias Mantissa = (UInt16, UInt16, UInt16, UInt16, UInt16, UInt16, UInt16, UInt16)
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// CHECK-LABEL: sil @struct_extract_from_decimal : {{.*}} {
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// CHECK: bb0([[POINTER:%[^,]+]] :
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// CHECK-SAME: [[NEW_MANTISSA:%[^,]+]] :
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// CHECK: [[ADDR:%[^,]+]] = pointer_to_address [[POINTER]]
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// CHECK: [[A_ADDR:%[^,]+]] = struct_element_addr [[ADDR]]
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// CHECK-SAME: #Decimal._mantissa
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// CHECK: br [[BODY:bb[0-9]+]]
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// CHECK: [[BODY]]:
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// CHECK: [[VALUE_2:%[^,]+]] = load [[ADDR]] : $*Decimal
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// CHECK: [[MANTISSA:%[^,]+]] = struct_extract [[VALUE_2]]
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// CHECK-SAME: #Decimal._mantissa
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// CHECK: store [[NEW_MANTISSA]] to [[A_ADDR]]
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// CHECK: cond_br undef, [[BACKEDGE:bb[0-9]+]], [[EXIT:bb[0-9]+]]
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// CHECK: [[BACKEDGE]]:
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// CHECK: br [[BODY]]
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// CHECK: [[EXIT]]:
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// CHECK: return [[MANTISSA]]
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// CHECK-LABEL: } // end sil function 'struct_extract_from_decimal'
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sil @struct_extract_from_decimal : $@convention(thin) (Builtin.RawPointer, Mantissa) -> (Mantissa) {
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bb0(%pointer : $Builtin.RawPointer, %newMantissa : $Mantissa):
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%addr = pointer_to_address %pointer : $Builtin.RawPointer to $*Decimal
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br bb1
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bb1:
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%value2 = load %addr : $*Decimal
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%a = struct_extract %value2 : $Decimal, #Decimal._mantissa
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%a_addr = struct_element_addr %addr : $*Decimal, #Decimal._mantissa
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store %newMantissa to %a_addr : $*Mantissa
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cond_br undef, bb2, bb3
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bb2:
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br bb1
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bb3:
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return %a : $Mantissa
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}
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