[thirdparty/gcc.git] / gcc / testsuite / gcc.dg / tree-ssa / popcount5ll.c

/* PR tree-optimization/94800 */
/* { dg-do compile } */
/* { dg-require-effective-target popcountll } */
/* { dg-options "-O2 -fdump-tree-optimized" } */

const unsigned long long m1  = 0x5555555555555555ULL;
const unsigned long long m2  = 0x3333333333333333ULL;
const unsigned long long m4  = 0x0F0F0F0F0F0F0F0FULL;
const int shift = 56;

int popcount64c(unsigned long long x)
{
    x -= (x >> 1) & m1;
    x = (x & m2) + ((x >> 2) & m2);
    x = (x + (x >> 4)) & m4;
    x += (x << 8);
    x += (x << 16);
    x += (x << 32);
    return x >> shift;
}

/* { dg-final { scan-tree-dump-times "\.POPCOUNT" 1 "optimized" { target { lp64 } } } } */
/* { dg-final { scan-tree-dump-times "\.POPCOUNT" 2 "optimized" { target { ! lp64 } } } } */
Commit	Line	Data
144aee70	1	/* PR tree-optimization/94800 */
5b43f6ac	2	/* { dg-do compile } */
144aee70 JJ	3	/* { dg-require-effective-target popcountll } */
	4	/* { dg-options "-O2 -fdump-tree-optimized" } */
	5
	6	const unsigned long long m1 = 0x5555555555555555ULL;
	7	const unsigned long long m2 = 0x3333333333333333ULL;
	8	const unsigned long long m4 = 0x0F0F0F0F0F0F0F0FULL;
	9	const int shift = 56;
	10
	11	int popcount64c(unsigned long long x)
	12	{
	13	x -= (x >> 1) & m1;
	14	x = (x & m2) + ((x >> 2) & m2);
	15	x = (x + (x >> 4)) & m4;
	16	x += (x << 8);
	17	x += (x << 16);
	18	x += (x << 32);
	19	return x >> shift;
	20	}
	21
5b43f6ac JR	22	/* { dg-final { scan-tree-dump-times "\.POPCOUNT" 1 "optimized" { target { lp64 } } } } */
5b43f6ac JR	23	/* { dg-final { scan-tree-dump-times "\.POPCOUNT" 2 "optimized" { target { ! lp64 } } } } */