gcc/testsuite/gcc.dg/pr80693.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O -fno-tree-coalesce-vars" } */
   3 typedef unsigned char u8;
   4 typedef unsigned short u16;
   5 typedef unsigned u32;
   6 typedef unsigned long long u64;
   7
   8 static u64 __attribute__((noinline, noclone))
   9 foo(u8 u8_0, u16 u16_0, u32 u32_0, u64 u64_0,  u16 u16_1)
  10 {
  11   u16_1 += 0x1051;
  12   u16_1 &= 1;
  13   u8_0 <<= u32_0 & 7;
  14   u16_0 -= !u16_1;
  15   u16_1 >>= ((u16)-u8_0 != 0xff);
  16   return u8_0 + u16_0 + u64_0 + u16_1;
  17 }
  18
  19 int
  20 main (void)
  21 {
  22   u64 x = foo(1, 1, 0xffff, 0, 1);
  23   if (x != 0x80)
  24     __builtin_abort();
  25   return 0;
  26 }