| /* { dg-xfail-run-if "" { { i?86-*-* x86_64-*-* } && ia32 } } */ |
| /* { dg-require-effective-target vect_double } */ |
| /* { dg-add-options ieee } */ |
| /* { dg-additional-options "-fno-fast-math" } */ |
| |
| #include "tree-vect.h" |
| |
| #define N (VECTOR_BITS * 17) |
| |
| double __attribute__ ((noinline, noclone)) |
| reduc_plus_double (double *a) |
| { |
| double r1 = 0; |
| double r2 = 0; |
| double r3 = 0; |
| double r4 = 0; |
| for (int i = 0; i < N; i += 4) |
| { |
| r1 += a[i]; |
| r2 += a[i + 1]; |
| r3 += a[i + 2]; |
| r4 += a[i + 3]; |
| } |
| return r1 * r2 * r3 * r4; |
| } |
| |
| int __attribute__ ((optimize (1))) |
| main () |
| { |
| double a[N]; |
| double r[4] = {}; |
| for (int i = 0; i < N; i++) |
| { |
| a[i] = (i * 0.1) * (i & 1 ? 1 : -1); |
| r[i % 4] += a[i]; |
| asm volatile ("" ::: "memory"); |
| } |
| double res = reduc_plus_double (a); |
| if (res != r[0] * r[1] * r[2] * r[3]) |
| __builtin_abort (); |
| return 0; |
| } |
| |
| /* { dg-final { scan-tree-dump-times "VECT_PERM_EXPR" 0 "vect" } } */ |
