| /* APPLE LOCAL file lno */ |
| /* { dg-do compile } */ |
| /* { dg-options "-O1 -floop-test -fdump-tree-lptest-details" } */ |
| |
| int |
| foo (int unknown_parm, int a, int b) |
| { |
| int p; |
| |
| if (unknown_parm) |
| { |
| p = a + 2; |
| } |
| else |
| { |
| p = b + 1; |
| } |
| |
| /* At this point the initial condition of "p" is unknown. |
| In this case, the analyzer has to keep the initial condition under a symbolic form. */ |
| |
| while (p) |
| p--; |
| |
| } |
| |
| /* |
| p -> {p_1, +, -1}_1 |
| |
| or, when the Value Range Propagation does its work: |
| |
| p -> {[MIN_EXPR <p_4, p_6>, MAX_EXPR <p_4, p_6>], +, -1}_1 |
| |
| */ |
| |
| /* FIXME. */ |
