| /* { dg-do compile } */ |
| /* { dg-options "-Ofast --param tree-reassoc-width=2 -fdump-tree-widening_mul" } */ |
| /* { dg-additional-options "-mfpmath=sse -mfma" { target { i?86-*-* x86_64-*-* } } } */ |
| |
| /* Test that the compiler properly optimizes multiply and add |
| to generate more FMA instructions. */ |
| #define N 1024 |
| double a[N]; |
| double b[N]; |
| double c[N]; |
| double d[N]; |
| double e[N]; |
| double f[N]; |
| double g[N]; |
| double h[N]; |
| double j[N]; |
| double k[N]; |
| double l[N]; |
| double m[N]; |
| double o[N]; |
| double p[N]; |
| |
| |
| void |
| foo (void) |
| { |
| for (int i = 0; i < N; i++) |
| { |
| a[i] += b[i] * c[i] + d[i] * e[i] + f[i] * g[i] + h[i] * j[i] + k[i] * l[i] + m[i]* o[i] + p[i]; |
| } |
| } |
| /* { dg-final { scan-tree-dump-times { = \.FMA \(} 6 "widening_mul" { target { i?86-*-* x86_64-*-* } } } } */ |
