gcc/testsuite/gcc.target/i386/pr78057.c

   1 /* PR target/78057 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -mbmi -mlzcnt -fdump-tree-optimized" } */
   4
   5 extern void link_error (void);
   6
   7 int
   8 foo (int x)
   9 {
  10   if (__builtin_ia32_tzcnt_u16 (16) != 4
  11       || __builtin_ia32_tzcnt_u16 (0) != 16
  12       || __builtin_ia32_lzcnt_u16 (0x1ff) != 7
  13       || __builtin_ia32_lzcnt_u16 (0) != 16
  14       || __builtin_ia32_tzcnt_u32 (8) != 3
  15       || __builtin_ia32_tzcnt_u32 (0) != 32
  16       || __builtin_ia32_lzcnt_u32 (0x3fffffff) != 2
  17       || __builtin_ia32_lzcnt_u32 (0) != 32
  18 #ifdef __x86_64__
  19       || __builtin_ia32_tzcnt_u64 (4) != 2
  20       || __builtin_ia32_tzcnt_u64 (0) != 64
  21       || __builtin_ia32_lzcnt_u64 (0x1fffffff) != 35
  22       || __builtin_ia32_lzcnt_u64 (0) != 64
  23 #endif
  24      )
  25     link_error ();
  26   x += 2;
  27   if (x == 0)
  28     return 5;
  29   return __builtin_ia32_tzcnt_u32 (x)
  30          + __builtin_ia32_lzcnt_u32 (x)
  31 #ifdef __x86_64__
  32          + __builtin_ia32_tzcnt_u64 (x)
  33          + __builtin_ia32_lzcnt_u64 (x)
  34 #endif
  35          ;
  36 }
  37
  38 /* { dg-final { scan-tree-dump-not "link_error" "optimized" } } */
  39 /* { dg-final { scan-tree-dump-not "__builtin_ia32_\[lt]zcnt" "optimized" } } */
  40 /* { dg-final { scan-tree-dump-times "__builtin_ctz " 1 "optimized" } } */
  41 /* { dg-final { scan-tree-dump-times "__builtin_clz " 1 "optimized" } } */
  42 /* { dg-final { scan-tree-dump-times "__builtin_ctzll " 1 "optimized" { target lp64 } } } */