gcc/testsuite/gcc.dg/pr94899.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4 typedef __INT16_TYPE__ int16_t;
   5 typedef __INT32_TYPE__ int32_t;
   6 typedef __UINT16_TYPE__ uint16_t;
   7 typedef __UINT32_TYPE__ uint32_t;
   8
   9 #define MAGIC (~ (uint32_t) 0 / 2 + 1)
  10
  11 int
  12 f_i16_i16 (int16_t x, int16_t y)
  13 {
  14   return x + MAGIC < y + MAGIC;
  15 }
  16
  17 int
  18 f_i16_i32 (int16_t x, int32_t y)
  19 {
  20   return x + MAGIC < y + MAGIC;
  21 }
  22
  23 int
  24 f_i32_i32 (int32_t x, int32_t y)
  25 {
  26   return x + MAGIC < y + MAGIC;
  27 }
  28
  29 int
  30 f_u32_i32 (uint32_t x, int32_t y)
  31 {
  32   return x + MAGIC < y + MAGIC;
  33 }
  34
  35 int
  36 f_u32_u32 (uint32_t x, uint32_t y)
  37 {
  38   return x + MAGIC < y + MAGIC;
  39 }
  40
  41 int
  42 f_i32_i32_sub (int32_t x, int32_t y)
  43 {
  44   return x - MAGIC < y - MAGIC;
  45 }
  46
  47 /* The addition/subtraction of constants should be optimized away.  */
  48 /* { dg-final { scan-tree-dump-not " \\+ " "optimized"} } */
  49 /* { dg-final { scan-tree-dump-not " \\- " "optimized"} } */