Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/warn/Wtype-limits.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
---|---|
date | Thu, 13 Feb 2020 11:34:05 +0900 |
parents | 84e7813d76e9 |
children |
line wrap: on
line source
/* { dg-do compile } */ /* { dg-options "-Wtype-limits" } */ extern void assert (int); 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 *-*-* } } */ return; if (255 >= (unsigned char) 1) return; } void b (unsigned short 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" } */ } void c (unsigned int x) { if (x < 0) return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */ if (x >= 0) return;/* { dg-warning "comparison of unsigned expression in '>= 0' is always true" } */ if (0 > x) return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */ if (0 <= x) return;/* { dg-warning "comparison of unsigned expression in '>= 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 in '< 0' is always false" } */ if (x >= 0) return;/* { dg-warning "comparison of unsigned expression in '>= 0' is always true" } */ if (0 > x) return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */ if (0 <= x) return;/* { dg-warning "comparison of unsigned expression in '>= 0' is always true" } */ } void e (unsigned long long x) { if (x < 0) return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */ if (x >= 0) return;/* { dg-warning "comparison of unsigned expression in '>= 0' is always true" } */ if (0 > x) return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */ if (0 <= x) return;/* { dg-warning "comparison of unsigned expression in '>= 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 *-*-* } } */ return 1; else return 0; } template <typename Int, Int D> void f(Int x) { assert(0 <= x and x <= D); } void ff(void) { f<unsigned char, 2>(5); f<signed char, 2>(5); } template <typename Int, Int D> void g(void) { assert(0 <= D); } void gg(void) { g<unsigned char, 2>(); }