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; RUN: not llvm-as <%s 2>&1 | FileCheck %s
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; "~x{21}" is not a valid clobber constraint.
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; CHECK: invalid type for inline asm constraint string
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define void @foo() nounwind {
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call void asm sideeffect "mov x0, #42", "~{x0},~{x19},~x{21}"() nounwind
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ret void
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}
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