gnu/dist/gcc4/gcc/testsuite/gcc.dg/tree-ssa/pr21171.c

   1 /* PR 21171.  Ivopts should not rewrite references to volatile memory.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O1 -fdump-tree-vars" } */
   4
   5 typedef unsigned int u_int32_t;
   6 typedef unsigned char u_int8_t;
   7
   8 #define AIC_VECTORS     32
   9
  10 typedef volatile struct AT91RM9200_regs {
  11   u_int32_t     SVR[AIC_VECTORS];
  12 } AT91RM9200_regs_t;
  13
  14 #define CPUReg  ((AT91RM9200_regs_t*)0xFFF00000)
  15
  16 extern const u_int32_t __IntTable[AIC_VECTORS];
  17
  18 int main()
  19 {
  20   int c;
  21
  22   for (c = 0; c < AIC_VECTORS; c++)
  23     CPUReg->SVR[c] = __IntTable[c];
  24
  25   return 0;
  26 }
  27
  28 /* { dg-final { scan-tree-dump-times "SVR" 1 "vars"} } */
  29 /* { dg-final { cleanup-tree-dump "vars" } } */