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// RUN: %clang_analyze_cc1 -triple=x86_64-unknown-linux-gnu -analyzer-checker=core,apiModeling,debug.ExprInspection -analyzer-config eagerly-assume=false -verify %s
void clang_analyzer_dump(int);
void clang_analyzer_dumpL(long);
void clang_analyzer_warnIfReached();
void testInspect(int x) {
if ((x < 10) || (x > 100)) {
return;
}
// x: [10, 100]
int i = x + 1;
long l = i - 10U;
clang_analyzer_dump(i); // expected-warning-re {{(reg_${{[0-9]+}}<int x>) + 1 }}
clang_analyzer_dumpL(l); // expected-warning-re {{(reg_${{[0-9]+}}<int x>) - 9U }} instead of + 4294967287U
clang_analyzer_dumpL(l + 0L); // expected-warning-re {{(reg_${{[0-9]+}}<int x>) - 9 }} instead of + 4294967287
if ((l - 1000) > 0) {
clang_analyzer_warnIfReached(); // no-warning
}
if (l > 1000) {
clang_analyzer_warnIfReached(); // no-warning
}
if (l > 1000L) {
clang_analyzer_warnIfReached(); // no-warning
}
if ((l + 0L) > 1000) {
clang_analyzer_warnIfReached(); // no-warning
}
i = x - 1;
l = i + 10U;
clang_analyzer_dumpL(l); // expected-warning-re {{(reg_${{[0-9]+}}<int x>) + 9U }} instead of - 4294967287U
i = x + (-1);
l = i - 10U;
clang_analyzer_dumpL(l); // expected-warning-re {{(reg_${{[0-9]+}}<int x>) - 11U }} instead of + 4294967285U
i = x + 1U;
l = i - 10U;
clang_analyzer_dumpL(l); // expected-warning-re {{(reg_${{[0-9]+}}<int x>) - 9U }} instead of + 4294967287U
}
const int intMin = 1 << (sizeof(int) * 8 - 1); // INT_MIN, negation value is not representable
const long longMin = 1L << (sizeof(long) * 8 - 1); // LONG_MIN, negation value is not representable
void testMin(int i, long l) {
clang_analyzer_dump(i + (-1)); // expected-warning-re {{(reg_${{[0-9]+}}<int i>) - 1 }} instead of + -1
clang_analyzer_dump(i - (-1)); // expected-warning-re {{(reg_${{[0-9]+}}<int i>) + 1 }} instead of - -1
clang_analyzer_dumpL(l + (-1)); // expected-warning-re {{(reg_${{[0-9]+}}<long l>) - 1 }} instead of + -1
clang_analyzer_dumpL(l - (-1)); // expected-warning-re {{(reg_${{[0-9]+}}<long l>) + 1 }} instead of - -1
// Do not normalize representation if negation would not be representable
clang_analyzer_dump(i + intMin); // expected-warning-re {{(reg_${{[0-9]+}}<int i>) + -2147483648 }} no change
clang_analyzer_dump(i - intMin); // expected-warning-re {{(reg_${{[0-9]+}}<int i>) - -2147483648 }} no change
// Produced value has higher bit with (long) so negation if representable
clang_analyzer_dumpL(l + intMin); // expected-warning-re {{(reg_${{[0-9]+}}<long l>) - 2147483648 }} instead of + -2147483648
clang_analyzer_dumpL(l - intMin); // expected-warning-re {{(reg_${{[0-9]+}}<long l>) + 2147483648 }} instead of - -2147483648
}
void changingToUnsinged(unsigned u, int i) {
unsigned c = u + (unsigned)i;
unsigned d = u - (unsigned)i;
if (i == -1) {
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned int u>) - 1U }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned int u>) + 1U }}
return;
}
if (i == intMin) {
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned int u>) - 2147483648U }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned int u>) + 2147483648U }}
return;
}
}
void extendingToSigned(long l, int i) {
long c = l + (long)i;
long d = l - (long)i;
if (i == -1) {
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<long l>) - 1 }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<long l>) + 1 }}
return;
}
if (i == intMin) {
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<long l>) - 2147483648 }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<long l>) + 2147483648 }}
return;
}
}
void extendingToUnigned(unsigned long ul, int i) {
unsigned long c = ul + (unsigned long)i;
unsigned long d = ul - (unsigned long)i;
if (i == -1) {
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned long ul>) - 1U }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned long ul>) + 1U }}
return;
}
if (i == intMin) {
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned long ul>) - 2147483648U }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned long ul>) + 2147483648U }}
return;
}
}
void truncatingToSigned(int i, long l) {
int c = i + (int)l;
int d = i - (int)l;
if (l == -1L) {
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<int i>) - 1 }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<int i>) + 1 }}
return;
}
if (l == (long)intMin) { // negation outside of range, no-changes
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<int i>) + -2147483648 }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<int i>) + -2147483648 }}
return;
}
if (l == ((long)intMin - 1L)) { // outside or range, no changes
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<int i>) + 2147483647 }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<int i>) - 2147483647 }}
return;
}
if (l == longMin) { // outside of range, no changes
clang_analyzer_dump(c + 0); // expected-warning-re {{reg_${{[0-9]+}}<int i> }}
clang_analyzer_dump(d + 0); // expected-warning-re {{reg_${{[0-9]+}}<int i> }}
return;
}
}
void truncatingToUnsigned(unsigned u, long l) {
unsigned c = u + (unsigned)l;
unsigned d = u - (unsigned)l;
if (l == -1L) {
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned int u>) - 1U }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned int u>) + 1U }}
return;
}
if (l == (long)intMin) {
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned int u>) - 2147483648U }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned int u>) + 2147483648U }}
return;
}
if (l == ((long)intMin - 1L)) { // outside or range, no changes
clang_analyzer_dump(c + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned int u>) + 2147483647U }}
clang_analyzer_dump(d + 0); // expected-warning-re {{(reg_${{[0-9]+}}<unsigned int u>) - 2147483647U }}
return;
}
if (l == longMin) { // outside of range, no changes
clang_analyzer_dump(c + 0); // expected-warning-re {{reg_${{[0-9]+}}<unsigned int u> }}
clang_analyzer_dump(d + 0); // expected-warning-re {{reg_${{[0-9]+}}<unsigned int u> }}
return;
}
}
// Test for crashes
typedef long ssize_t;
ssize_t write(int, const void *, unsigned long);
int crashTest(int x, int fd) {
unsigned wres = write(fd, "a", 1);
if (wres) {
}
int t1 = x - wres;
if (wres < 0) {
}
return x + t1; // no crash
}
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