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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/g++.dg/warn/Wtype-limits.C | |
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Diffstat (limited to 'gcc/testsuite/g++.dg/warn/Wtype-limits.C')
-rw-r--r-- | gcc/testsuite/g++.dg/warn/Wtype-limits.C | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/warn/Wtype-limits.C b/gcc/testsuite/g++.dg/warn/Wtype-limits.C new file mode 100644 index 000000000..814c2a882 --- /dev/null +++ b/gcc/testsuite/g++.dg/warn/Wtype-limits.C @@ -0,0 +1,84 @@ +/* { 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 *-*-* } 16 } */ + 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 *-*-* } 61 } */ + return 1; + else + return 0; +} + +template <typename Int, Int D> +void f(Int x) { + assert(0 <= x and x <= D); // { dg-warning "comparison is always true due to limited range of data type" } +} + +int ff(void) { + f<unsigned char, 2>(5); + f<signed char, 2>(5); +} + +template <typename Int, Int D> +void g(void) { + assert(0 <= D); +} +int gg(void) { + g<unsigned char, 2>(); +} + |