| /* PR tree-optimization/64193 */ |
| /* { dg-do compile } */ |
| /* { dg-options "-O -fdump-tree-fre1" } */ |
| |
| double T,T2,E1[5]; |
| int J; |
| |
| void |
| PA(double E[]) |
| { |
| J = 0; |
| |
| L10: |
| E[1] = ( E[1] + E[2] + E[3] - E[4]) * T; |
| E[2] = ( E[1] + E[2] - E[3] + E[4]) * T; |
| E[3] = ( E[1] - E[2] + E[3] + E[4]) * T; |
| E[4] = (-E[1] + E[2] + E[3] + E[4]) / T2; |
| J += 1; |
| |
| if (J < 6) |
| goto L10; |
| } |
| |
| /* We should remove 15 dead loads and some related stmts, fully propagating |
| their replacements with exactly 4 loads and 4 stores from/to E remaining. */ |
| |
| /* { dg-final { scan-tree-dump-times "MEM" 8 "fre1" } } */ |
