clang-1/test/Sema/asm.c

// RUN: clang %s -verify -fsyntax-only

void
f()
{
  int i;

  asm ("foo\n" : : "a" (i + 2));
  asm ("foo\n" : : "a" (f())); // expected-error {{invalid type 'void' in asm input}}
  
  asm ("foo\n" : "=a" (f())); // expected-error {{invalid lvalue in asm output}}
  asm ("foo\n" : "=a" (i + 2)); // expected-error {{invalid lvalue in asm output}}
  
}