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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc2/] [gcc/] [testsuite/] [gcc.dg/] [compare4.c] - Rev 298
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/* 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:signed and unsigned" "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:signed and unsigned" "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; }
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