Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/warn/Wtype-limits.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children | 1830386684a0 |
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/* { 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 < 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 *-*-* } } */ 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>(); }