| /* { dg-do compile } */ |
| /* { dg-options "-fno-strict-overflow -O2 -fdump-tree-optimized" } */ |
| |
| /* Source: Ian Lance Taylor. */ |
| |
| /* VRP test. We can not simplify the conditional when not using |
| strict overflow semantics. We don't test this with |
| -fstrict-overflow because it turns into an infinite loop. That is |
| OK but it would also be OK to not do that. */ |
| |
| int |
| foo () |
| { |
| int i, bits; |
| for (i = 1, bits = 1; i > 0; i += i) |
| ++bits; |
| return bits - sizeof(int) * __CHAR_BIT__; |
| } |
| |
| /* { dg-final { scan-tree-dump "return 0" "optimized" } } */ |
