range_casts.c
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// 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.
// RUN: %clang_analyze_cc1 -triple x86_64-pc-linux-gnu -analyzer-checker=core,debug.ExprInspection -analyzer-store=region -verify %s
void clang_analyzer_warnIfReached();
void f1(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
if (index + 1 == 0) // because of foo range, index is in range [0; UINT_MAX]
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f2(unsigned long foo)
{
int index = -1;
if (index < foo) index = foo; // index equals ULONG_MAX
if (index + 1 == 0)
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // no-warning
}
void f3(unsigned long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
if (index + 1 == 0)
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f4(long foo)
{
int index = -1;
if (index < foo) index = foo;
if (index + 1 == 0)
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f5(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
if (index == -1)
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f6(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
if (index == -1)
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f7(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
if (index - 1 == 0) // Was not reached prior fix.
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f8(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
if (index + 1L == 0L)
clang_analyzer_warnIfReached(); // no-warning
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f9(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
if (index - 1L == 0L) // Was not reached prior fix.
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f10(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
if (index + 1 == 0L)
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f11(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
if (index + 1UL == 0L)
clang_analyzer_warnIfReached(); // no-warning
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f12(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
if (index - 1UL == 0L) // Was not reached prior fix.
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f13(int foo)
{
unsigned short index = -1;
if (index < foo) index = foo;
if (index + 1 == 0)
clang_analyzer_warnIfReached(); // no-warning
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f14(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
long bar = foo;
if (index + 1 == 0)
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}
void f15(long foo)
{
unsigned index = -1;
if (index < foo) index = foo;
unsigned int tmp = index + 1;
if (tmp == 0)
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
else
clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}}
}