gcc/testsuite/gcc.target/sh/pr51244-8.c

   1 /* Check that compare-branch is inverted properly.
   2    Example:
   3         mov     #1,r0   ->      tst     r8,r8
   4         neg     r8,r1           bt      .L47
   5         shad    r1,r0
   6         tst     #1,r0
   7         bf      .L47
   8 */
   9 /* { dg-do compile }  */
  10 /* { dg-options "-O2" } */
  11 /* { dg-skip-if "" { "sh*-*-*" } { "-m5*" } { "" } } */
  12 /* { dg-final { scan-assembler-not "shad|neg" } } */
  13
  14 int test_01_00 (int*, void*);
  15 int
  16 test_01 (int* m, void* v)
  17 {
  18   unsigned long n = (unsigned long)v - 1;
  19
  20   if (!n)
  21     return 50;
  22
  23   if (1 & (1 << n))     /* if n == 0: 1 & (1 << 0) -> true  */
  24     return 60;
  25   else                  /* if n != 0: 1 & (1 << n) -> false  */
  26     return -8;
  27 }