/* { dg-do compile } */ /* { dg-options "-Wtype-limits" } */ void a (unsigned char x) { if (x < 0) return;/* { dg-warning "comparison is always false due to limited range of data type" } */ if (x >= 0) return;/* { dg-warning "comparison is always true due to limited range of data type" } */ if (0 > x) return;/* { dg-warning "comparison is always false due to limited range of data type" } */ if (0 <= x) return;/* { dg-warning "comparison is always true due to limited range of data type" } */ if (x <= 255) /* { dg-warning "comparison is always true due to limited range of data type" } */ return; if (255 >= x) /* { dg-warning "comparison is always true due to limited range of data type" } */ return; if ((int)x <= 255) /* { dg-bogus "comparison is always true due to limited range of data type" "" { xfail *-*-* } 16 } */ return; if (255 >= (unsigned char) 1) return; } void b (unsigned short x) { /* { dg-warning "comparison of unsigned expression < 0 is always false" "" { target { ! int32plus } } 25 } */ if (x < 0) return;/* { dg-warning "comparison is always false due to limited range of data type" "" { target { int32plus } } } */ /* { dg-warning "comparison of unsigned expression >= 0 is always true" "" { target { ! int32plus } } 27 } */ if (x >= 0) return;/* { dg-warning "comparison is always true due to limited range of data type" "" { target { int32plus } } } */ /* { dg-warning "comparison of unsigned expression < 0 is always false" "" { target { ! int32plus } } 29 } */ if (0 > x) return;/* { dg-warning "comparison is always false due to limited range of data type" "" { target { int32plus } } } */ /* { dg-warning "comparison of unsigned expression >= 0 is always true" "" { target { ! int32plus } } 31 } */ if (0 <= x) return;/* { dg-warning "comparison is always true due to limited range of data type" "" { target { int32plus } } } */ } void c (unsigned int x) { if (x < 0) return;/* { dg-warning "comparison of unsigned expression < 0 is always false" } */ if (x >= 0) return;/* { dg-warning "comparison of unsigned expression >= 0 is always true" } */ if (0 > x) return;/* { dg-warning "comparison of unsigned expression < 0 is always false" } */ if (0 <= x) return;/* { dg-warning "comparison of unsigned expression >= 0 is always true" } */ if (1U >= 0) return; if (1U < 0) return; if (0 <= 1U) return; if (0 > 1U) return; } void d (unsigned long x) { if (x < 0) return;/* { dg-warning "comparison of unsigned expression < 0 is always false" } */ if (x >= 0) return;/* { dg-warning "comparison of unsigned expression >= 0 is always true" } */ if (0 > x) return;/* { dg-warning "comparison of unsigned expression < 0 is always false" } */ if (0 <= x) return;/* { dg-warning "comparison of unsigned expression >= 0 is always true" } */ } void e (unsigned long long x) { if (x < 0) return;/* { dg-warning "comparison of unsigned expression < 0 is always false" } */ if (x >= 0) return;/* { dg-warning "comparison of unsigned expression >= 0 is always true" } */ if (0 > x) return;/* { dg-warning "comparison of unsigned expression < 0 is always false" } */ if (0 <= x) return;/* { dg-warning "comparison of unsigned expression >= 0 is always true" } */ } int test (int x) { if ((long long)x <= 0x123456789ABCLL) /* { dg-bogus "comparison is always true due to limited range of data type" "" { xfail *-*-* } 64 } */ return 1; else return 0; }