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// RUN: %clang_cc1 -fsyntax-only -Wuninitialized-experimental -fsyntax-only %s -verify
int test1() {
int x;
return x; // expected-warning{{use of uninitialized variable 'x'}}
}
int test2() {
int x = 0;
return x; // no-warning
}
int test3() {
int x;
x = 0;
return x; // no-warning
}
int test4() {
int x;
++x; // expected-warning{{use of uninitialized variable 'x'}}
return x;
}
int test5() {
int x, y;
x = y; // expected-warning{{use of uninitialized variable 'y'}}
return x;
}
int test6() {
int x;
x += 2; // expected-warning{{use of uninitialized variable 'x'}}
return x;
}
int test7(int y) {
int x;
if (y)
x = 1;
return x; // expected-warning{{use of uninitialized variable 'x'}}
}
int test8(int y) {
int x;
if (y)
x = 1;
else
x = 0;
return x; // no-warning
}
int test9(int n) {
int x;
for (unsigned i = 0 ; i < n; ++i) {
if (i == n - 1)
break;
x = 1;
}
return x; // expected-warning{{use of uninitialized variable 'x'}}
}
int test10(unsigned n) {
int x;
for (unsigned i = 0 ; i < n; ++i) {
x = 1;
}
return x; // expected-warning{{use of uninitialized variable 'x'}}
}
int test11(unsigned n) {
int x;
for (unsigned i = 0 ; i <= n; ++i) {
x = 1;
}
return x; // expected-warning{{use of uninitialized variable 'x'}}
}
void test12(unsigned n) {
for (unsigned i ; n ; ++i) ; // expected-warning{{use of uninitialized variable 'i'}}
}
int test13() {
static int i;
return i; // no-warning
}
// Simply don't crash on this test case.
void test14() {
const char *p = 0;
for (;;) {}
}
void test15() {
int x = x; // expected-warning{{use of uninitialized variable 'x'}}
}
// Don't warn in the following example; shows dataflow confluence.
char *test16_aux();
void test16() {
char *p = test16_aux();
for (unsigned i = 0 ; i < 100 ; i++)
p[i] = 'a'; // no-warning
}
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