gcc/testsuite/gcc.target/riscv/losum-overflow.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-march=rv32gc -mabi=ilp32 -O2 -fno-section-anchors" } */
   3
   4 /* Check for %lo overflow.  Adding an offset larger than the alignment can
   5    overflow if the data is allocated to an address mod 4KB that is between
   6    2KB-offset+1 and 2KB-1.  */
   7 typedef long long int int64_t;
   8
   9 #pragma pack(push)
  10 #pragma pack(1)
  11 struct S0 {
  12    signed f0 : 4;
  13    const volatile int64_t  f1;
  14    volatile signed f2 : 1;
  15    signed f3 : 31;
  16    unsigned f4 : 8;
  17    signed f5 : 20;
  18    unsigned f6 : 5;
  19 };
  20 #pragma pack(pop)
  21
  22 struct S0 g_3030 = {0,-9L,-0,-22553,7,-841,1};
  23
  24 int64_t
  25 sub (void)
  26 {
  27   return g_3030.f1;
  28 }
  29 /* { dg-final { scan-assembler-not "%lo\\(g_3030\\+4\\)" } } */