| /* { dg-do compile } */ |
| /* { dg-additional-options "-Ofast" } */ |
| /* { dg-require-effective-target vect_double } */ |
| |
| void foo1x1(double* restrict y, const double* restrict x, int clen) |
| { |
| int xi = clen & 2; |
| double f_re = x[0+xi+0]; |
| double f_im = x[4+xi+0]; |
| int clen2 = (clen+xi) * 2; |
| #pragma GCC unroll 0 |
| for (int c = 0; c < clen2; c += 8) { |
| #pragma GCC unroll 4 |
| for (int k = 0; k < 4; ++k) { |
| double x_re = x[k]; |
| double x_im = x[c+4+k]; |
| double y_re = y[c+0+k]; |
| double y_im = y[c+4+k]; |
| y_re = y_re - x_re * f_re - x_im * f_im;; |
| y_im = y_im + x_re * f_im - x_im * f_re; |
| y[c+0+k] = y_re; |
| y[c+4+k] = y_im; |
| } |
| } |
| } |
| |
| /* { dg-final { scan-tree-dump "vectorizing stmts using SLP" "vect" } } */ |
| /* { dg-final { scan-tree-dump "Loop contains only SLP stmts" "vect" } } */ |
