blob: 0300850f904a3f5f4f3edf7779712a4630c8b41d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* Test for diagnostics for implicit conversions between signed and
unsigned integer types.
These tests come from gcc/testsuite/gcc.dg/overflow-warn-2.c */
/* { dg-do compile } */
/* { dg-options "-std=c99 -fsigned-char -Wsign-conversion" } */
#include <limits.h>
void fsc (signed char sc);
void fuc (unsigned char uc);
unsigned fui (unsigned int ui);
void fsi (signed int ui);
void h (int x)
{
unsigned int ui = 3;
int si = 3;
unsigned char uc = 3;
signed char sc = 3;
uc = ui;
uc = si;
sc = ui;
sc = si;
fuc (ui);
fuc (si);
fsc (ui);
fsc (si);
fsi (si);
fui (ui);
fsi (uc);
si = uc;
fui (uc);
ui = uc;
fui ('A');
ui = 'A';
fsi ('A');
si = 'A';
fuc ('A');
uc = 'A';
uc = x ? 1U : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
uc = x ? SCHAR_MIN : 1U; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
uc = x ? 1 : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
uc = x ? SCHAR_MIN : 1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
ui = x ? 1U : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
ui = x ? INT_MIN : 1U; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
ui = ui ? SCHAR_MIN : 1U; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
ui = 1U * -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
ui = ui + INT_MIN; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
ui = x ? 1 : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
ui = ui ? SCHAR_MIN : 1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
fuc (-1); /* { dg-warning "negative integer implicitly converted to unsigned type" } */
uc = -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
fui (-1); /* { dg-warning "negative integer implicitly converted to unsigned type" } */
ui = -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
fuc ('\xa0'); /* { dg-warning "negative integer implicitly converted to unsigned type" } */
uc = '\xa0'; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
fui ('\xa0');/* { dg-warning "negative integer implicitly converted to unsigned type" } */
ui = '\xa0'; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
fsi (0x80000000); /* { dg-warning "conversion" } */
si = 0x80000000; /* { dg-warning "conversion" } */
fsi (UINT_MAX - 1); /* { dg-warning "conversion" } */
si = UINT_MAX - 1; /* { dg-warning "conversion" } */
fsi (UINT_MAX - 1U); /* { dg-warning "conversion" } */
si = UINT_MAX - 1U; /* { dg-warning "conversion" } */
fsi (UINT_MAX/3U);
si = UINT_MAX/3U;
fsi (UINT_MAX/3);
si = UINT_MAX/3;
fui (UINT_MAX - 1);
ui = UINT_MAX - 1;
uc = (unsigned char) -1;
ui = -1 * (1 * -1);
ui = (unsigned) -1;
fsc (uc); /* { dg-warning "conversion" } */
sc = uc; /* { dg-warning "conversion" } */
fuc (sc); /* { dg-warning "conversion" } */
uc = sc; /* { dg-warning "conversion" } */
fsi (ui); /* { dg-warning "conversion" } */
si = ui; /* { dg-warning "conversion" } */
fui (si); /* { dg-warning "conversion" } */
ui = si; /* { dg-warning "conversion" } */
fui (sc); /* { dg-warning "conversion" } */
ui = sc; /* { dg-warning "conversion" } */
}
unsigned fui (unsigned a) { return a + -1; } /* { dg-warning "negative integer implicitly converted to unsigned type" } */
|
