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150
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1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -std=c++11 -o - %s | FileCheck %s
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2
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3 __attribute((objc_root_class)) @interface A @end
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4 @interface B : A @end
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5
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6 // rdar://problem/23559789
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7 // Ensure that type differences don't cause an assert here.
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8 void test0(__weak B **src) {
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9 __weak A *dest = *src;
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10 }
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221
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11 // CHECK-LABEL: define{{.*}} void @_Z5test0PU6__weakP1B(
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150
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12 // CHECK: [[SRC:%.*]] = alloca [[B:%.*]]**, align 8
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13 // CHECK: [[DEST:%.*]] = alloca [[A:%.*]]*, align 8
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14 // CHECK: [[T0:%.*]] = load [[B]]**, [[B]]*** [[SRC]], align 8
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15 // CHECK-NEXT: [[T1:%.*]] = bitcast [[B]]** [[T0]] to [[A]]**
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16 // CHECK-NEXT: [[T2:%.*]] = bitcast [[A]]** [[DEST]] to i8**
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17 // CHECK-NEXT: [[T3:%.*]] = bitcast [[A]]** [[T1]] to i8**
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18 // CHECK-NEXT: call void @llvm.objc.copyWeak(i8** [[T2]], i8** [[T3]])
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19 // CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]** [[DEST]] to i8**
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20 // CHECK: call void @llvm.objc.destroyWeak(i8** [[T0]])
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21
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22 void test1(__weak B **src) {
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23 __weak A *dest = static_cast<__weak B*&&>(*src);
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24 }
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221
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25 // CHECK-LABEL: define{{.*}} void @_Z5test1PU6__weakP1B(
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150
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26 // CHECK: [[SRC:%.*]] = alloca [[B:%.*]]**, align 8
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27 // CHECK: [[DEST:%.*]] = alloca [[A:%.*]]*, align 8
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28 // CHECK: [[T0:%.*]] = load [[B]]**, [[B]]*** [[SRC]], align 8
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29 // CHECK-NEXT: [[T1:%.*]] = bitcast [[B]]** [[T0]] to [[A]]**
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30 // CHECK-NEXT: [[T2:%.*]] = bitcast [[A]]** [[DEST]] to i8**
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31 // CHECK-NEXT: [[T3:%.*]] = bitcast [[A]]** [[T1]] to i8**
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32 // CHECK-NEXT: call void @llvm.objc.moveWeak(i8** [[T2]], i8** [[T3]])
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33 // CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]** [[DEST]] to i8**
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34 // CHECK: call void @llvm.objc.destroyWeak(i8** [[T0]])
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