| /* { dg-do compile } */ |
| /* { dg-options "-O1 -fdump-tree-dom2" } */ |
| |
| extern void abort (void); |
| |
| union tree_node; |
| typedef union tree_node *tree; |
| extern const char tree_code_type[]; |
| |
| union tree_node |
| { |
| int code; |
| long pointer_alias_set; |
| }; |
| |
| long |
| get_alias_set (t) |
| tree t; |
| { |
| if (tree_code_type[t->code]) |
| abort (); |
| if (t->pointer_alias_set) |
| { |
| tree __t = t; |
| if (tree_code_type[__t->code]) |
| abort (); |
| } |
| } |
| |
| /* There should be precisely one load of {t,__t}->code. If there is |
| more than one, then the dominator optimizations failed. */ |
| /* { dg-final { scan-tree-dump-times "->code" 1 "dom2"} } */ |
| |
| /* There should be precisely one load of tree_code_type. If there is |
| more than one, then the dominator optimizations failed. */ |
| /* { dg-final { scan-tree-dump-times "tree_code_type" 1 "dom2"} } */ |
| |
| /* There should be one IF conditional. If 'tree_code_type[t->code]' is |
| zero, then the third if() conditional is unnecessary. That should cause |
| the call to abort() to be removed, which in turn causes the whole second |
| if() to disappear. */ |
| /* { dg-final { scan-tree-dump-times "if " 1 "dom2"} } */ |
| |
