Clang Project

clang_source_code/test/Analysis/range_casts.c
1// This test checks that intersecting ranges does not cause 'system is over constrained' assertions in the case of eg: 32 bits unsigned integers getting their range from 64 bits signed integers.
2// RUN: %clang_analyze_cc1 -triple x86_64-pc-linux-gnu -analyzer-checker=core,debug.ExprInspection -analyzer-store=region -verify %s
3
4void clang_analyzer_warnIfReached();
5
6void f1(long foo)
7{
8  unsigned index = -1;
9  if (index < foo) index = foo;
10  if (index + 1 == 0) // because of foo range, index is in range [0; UINT_MAX]
11    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
12  else
13    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
14}
15
16void f2(unsigned long foo)
17{
18  int index = -1;
19  if (index < foo) index = foo; // index equals ULONG_MAX
20  if (index + 1 == 0)
21    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
22  else
23    clang_analyzer_warnIfReached(); // no-warning
24}
25
26void f3(unsigned long foo)
27{
28  unsigned index = -1;
29  if (index < foo) index = foo;
30  if (index + 1 == 0)
31    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
32  else
33    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
34}
35
36void f4(long foo)
37{
38  int index = -1;
39  if (index < foo) index = foo;
40  if (index + 1 == 0)
41    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
42  else
43    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
44}
45
46void f5(long foo)
47{
48  unsigned index = -1;
49  if (index < foo) index = foo;
50  if (index == -1)
51    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
52  else
53    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
54}
55
56void f6(long foo)
57{
58  unsigned index = -1;
59  if (index < foo) index = foo;
60  if (index == -1)
61    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
62  else
63    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
64}
65
66void f7(long foo)
67{
68  unsigned index = -1;
69  if (index < foo) index = foo;
70  if (index - 1 == 0) // Was not reached prior fix.
71    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
72  else
73    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
74}
75
76void f8(long foo)
77{
78  unsigned index = -1;
79  if (index < foo) index = foo;
80  if (index + 1L == 0L)
81    clang_analyzer_warnIfReached(); // no-warning
82  else
83    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
84}
85
86void f9(long foo)
87{
88  unsigned index = -1;
89  if (index < foo) index = foo;
90  if (index - 1L == 0L) // Was not reached prior fix.
91    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
92  else
93    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
94}
95
96void f10(long foo)
97{
98  unsigned index = -1;
99  if (index < foo) index = foo;
100  if (index + 1 == 0L)
101    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
102  else
103    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
104}
105
106void f11(long foo)
107{
108  unsigned index = -1;
109  if (index < foo) index = foo;
110  if (index + 1UL == 0L)
111    clang_analyzer_warnIfReached(); // no-warning
112  else
113    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
114}
115
116void f12(long foo)
117{
118  unsigned index = -1;
119  if (index < foo) index = foo;
120  if (index - 1UL == 0L) // Was not reached prior fix.
121    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
122  else
123    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
124}
125
126void f13(int foo)
127{
128  unsigned short index = -1;
129  if (index < foo) index = foo;
130  if (index + 1 == 0)
131    clang_analyzer_warnIfReached(); // no-warning
132  else
133    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
134}
135
136void f14(long foo)
137{
138  unsigned index = -1;
139  if (index < foo) index = foo;
140  long bar = foo;
141  if (index + 1 == 0)
142    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
143  else
144    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
145}
146
147void f15(long foo)
148{
149  unsigned index = -1;
150  if (index < foo) index = foo;
151  unsigned int tmp = index + 1;
152  if (tmp == 0)
153    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
154  else
155    clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
156}
157
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