derek.holloway
7502bf64a4
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21 lines
734 B
C
21 lines
734 B
C
// RUN: %clang -mfloat-abi=soft -target arm-linux-gnu -emit-llvm -S -o - %s | FileCheck %s
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struct Empty {};
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struct Empty emptyvar;
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void take_args(int a, ...) {
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// CHECK: [[ALLOCA_VA_LIST:%[a-zA-Z0-9._]+]] = alloca %struct.__va_list, align 4
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// CHECK: call void @llvm.va_start
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// It's conceivable that EMPTY_PTR may not actually be a valid pointer
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// (e.g. it's at the very bottom of the stack and the next page is
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// invalid). This doesn't matter provided it's never loaded (there's no
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// well-defined way to tell), but it becomes a problem if we do try to use it.
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// CHECK-NOT: load %struct.Empty
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__builtin_va_list l;
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__builtin_va_start(l, a);
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emptyvar = __builtin_va_arg(l, struct Empty);
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__builtin_va_end(l);
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}
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