| /* Test for a bogus warning on comparison between signed and unsigned. |
| Origin: Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 5/13/2001. */ |
| |
| /* { dg-do compile } */ |
| /* { dg-options "-fshow-column -Wsign-compare -fstrict-overflow" } */ |
| |
| extern void bar(void); |
| |
| int foo(int x, int y, unsigned u) |
| { |
| /* A COMPOUND_EXPR is non-negative if the last element is known to |
| be non-negative. */ |
| if (u < (bar(), -1)) /*{ dg-warning "9:different signedness" "COMPOUND_EXPR" }*/ |
| return x; |
| if (u < (bar(), 10)) |
| return x; |
| if ((bar(), 10) < u) |
| return x; |
| if (u < (x ? (bar(),bar(),bar(),bar(),x==y) : 10)) |
| return x; |
| if ((x ? 10 : (bar(),bar(),bar(),bar(),x==y)) < u) |
| return x; |
| |
| /* Test an ABS_EXPR, which is by definition non-negative when |
| -fstrict-overflow is used. */ |
| if (u < __builtin_abs(x)) |
| return x; |
| if (__builtin_abs(x) < u) |
| return x; |
| if (u < (x ? __builtin_abs(x) : 10)) |
| return x; |
| if ((x ? 10: __builtin_abs(x)) < u) |
| return x; |
| |
| /* A MODIFY_EXPR is non-negative if the new value is known to be |
| non-negative. */ |
| if (u < (x = -1)) /* { dg-warning "9:different signedness" "MODIFY_EXPR" } */ |
| return x; |
| if (u < (x = 10)) |
| return x; |
| if ((x = 10) < u) |
| return x; |
| if (u < (x = (y ? (x==y) : 10))) |
| return x; |
| if ((x = (y ? 10 : (x==y))) < u) |
| return x; |
| |
| return 0; |
| } |
