fold-even-1.c

来自「用于进行gcc测试」· C语言 代码 · 共 34 行

/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-original" } */
int test1(int a)
{
  return !(a & 1);
}

int test2(int b)
{
  return (b & 1) == 0;
}

int test3(int c)
{
  return (c & 1) ^ 1;
}

int test4(int d)
{
  return (d ^ 1) & 1;
}

int test5(int e)
{
  return ~e & 1;
}

/* { dg-final { scan-tree-dump-times "\\(a \& 1\\) == 0" 1 "original" } } */
/* { dg-final { scan-tree-dump-times "\\(b \& 1\\) == 0" 1 "original" } } */
/* { dg-final { scan-tree-dump-times "\\(c \& 1\\) == 0" 1 "original" } } */
/* { dg-final { scan-tree-dump-times "\\(d \& 1\\) == 0" 1 "original" } } */
/* { dg-final { scan-tree-dump-times "\\(e \& 1\\) == 0" 1 "original" } } */
/* { dg-final { cleanup-tree-dump "original" } } */