gcc/testsuite/gcc.target/arm/wmul-bitfield-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-require-effective-target arm_dsp } */
   4
   5 struct bf
   6 {
   7   int a : 3;
   8   int b : 15;
   9   int c : 3;
  10 };
  11
  12 long long
  13 foo (long long a, struct bf b, struct bf c)
  14 {
  15   return a + b.b * c.b;
  16 }
  17
  18 /* { dg-final { scan-assembler "smlalbb" } } */