gcc-4.9/gcc/testsuite/gcc.target/nios2/nios2-wrctl-zero.c


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/* { dg-do compile } */
/* { dg-options "-O1" } */
/* { dg-final { scan-assembler "wrctl\\tctl6, zero" } } */

void foo(void){
  __builtin_wrctl(6,0);
}