[thirdparty/gcc.git] / gcc / testsuite / gcc.dg / tree-ssa / loop-interchange-16.c

/* PR/101280 */
/* { dg-do compile } */
/* { dg-options "-O3 -fdump-tree-linterchange-details" } */

void dummy (double *, double *);
#define LEN_2D 32
double aa[LEN_2D][LEN_2D], bb[LEN_2D][LEN_2D];
double s231(int iterations)
{
//    loop interchange
//    loop with data dependency
    for (int nl = 0; nl < 100*(iterations/LEN_2D); nl++) {
        for (int i = 0; i < LEN_2D; ++i) {
            for (int j = 1; j < LEN_2D; j++) {
                aa[j][i] = aa[j - 1][i] + bb[j][i];
            }
        }
        dummy(aa[0],bb[0]);
    }
}

/* { dg-final { scan-tree-dump "loops interchanged" "linterchange" } } */
Commit	Line	Data
0a77c07b RB	1	/* PR/101280 */
	2	/* { dg-do compile } */
	3	/* { dg-options "-O3 -fdump-tree-linterchange-details" } */
	4
	5	void dummy (double , double );
	6	#define LEN_2D 32
	7	double aa[LEN_2D][LEN_2D], bb[LEN_2D][LEN_2D];
	8	double s231(int iterations)
	9	{
	10	// loop interchange
	11	// loop with data dependency
	12	for (int nl = 0; nl < 100*(iterations/LEN_2D); nl++) {
	13	for (int i = 0; i < LEN_2D; ++i) {
	14	for (int j = 1; j < LEN_2D; j++) {
	15	aa[j][i] = aa[j - 1][i] + bb[j][i];
	16	}
	17	}
	18	dummy(aa[0],bb[0]);
	19	}
	20	}
	21
	22	/* { dg-final { scan-tree-dump "loops interchanged" "linterchange" } } */