gcc-4.9/gcc/testsuite/gcc.target/mips/truncate-5.c


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/* If we AND in DI mode (i.e. replace the order of TRUNCATE and AND) then we
   can remove the TRUNCATE.  */
/* { dg-options "-mgp64" } */
/* { dg-skip-if "code quality test" { *-*-* } { "-O0" } { "" } } */
/* { dg-final { scan-assembler-not "\tsll\t\[^\n\]*,0" } } */

struct s
{
  unsigned a:5;
};

NOMIPS16 void
f (struct s *s, unsigned long long a)
{
  s->a = a & 0x3;
}