gcc/testsuite/gcc.target/i386/pr78120.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -mtune=generic" } */
   3 /* { dg-final { scan-assembler "adc" } } */
   4 /* { dg-final { scan-assembler-not "jmp" } } */
   5
   6 typedef unsigned long u64;
   7
   8 typedef struct {
   9   u64 hi, lo;
  10 } u128;
  11
  12 static inline u128 add_u128 (u128 a, u128 b)
  13 {
  14   a.hi += b.hi;
  15   a.lo += b.lo;
  16   if (a.lo < b.lo)
  17     a.hi++;
  18
  19   return a;
  20 }
  21
  22 extern u128 t1, t2, t3;
  23
  24 void foo (void)
  25 {
  26   t1 = add_u128 (t1, t2);
  27   t1 = add_u128 (t1, t3);
  28 }