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// RUN: %clang_cc1 -std=gnu++11 -Wsometimes-uninitialized -verify %s
bool maybe();
int test_if_false(bool b) {
int x; // expected-note {{variable}}
if (b) x = 1; // expected-note {{whenever 'if' condition is false}}
return x; // expected-warning {{sometimes uninit}}
}
int test_if_true(bool b) {
int x; // expected-note {{variable}}
if (b) {} // expected-note {{whenever 'if' condition is true}}
else x = 1;
return x; // expected-warning {{sometimes uninit}}
}
int test_while_false(bool b) {
int x; // expected-note {{variable}}
while (b) { // expected-note {{whenever 'while' loop exits because its condition is false}}
if (maybe()) {
x = 1;
break;
}
};
return x; // expected-warning {{sometimes uninit}}
}
int test_while_true(bool b) {
int x; // expected-note {{variable}}
while (b) { // expected-note {{whenever 'while' loop is entered}}
label:
return x; // expected-warning {{sometimes uninit}}
}
x = 0;
goto label;
}
int test_do_while_false(bool b) {
int x; // expected-note {{variable}}
do {
if (maybe()) {
x = 1;
break;
}
} while (b); // expected-note {{whenever 'do' loop exits because its condition is false}}
return x; // expected-warning {{sometimes uninit}}
}
int test_do_while_true(bool b) {
int x; // expected-note {{variable}}
goto label2;
do {
label1:
return x; // expected-warning {{sometimes uninit}}
label2: ;
} while (b); // expected-note {{whenever 'do' loop condition is true}}
x = 0;
goto label1;
}
int test_for_false(int k) {
int x; // expected-note {{variable}}
for (int n = 0;
n < k; // expected-note {{whenever 'for' loop exits because its condition is false}}
++n) {
if (maybe()) {
x = n;
break;
}
}
return x; // expected-warning {{sometimes uninit}}
}
int test_for_true(int k) {
int x; // expected-note {{variable}}
int n = 0;
for (;
n < k; // expected-note {{whenever 'for' loop is entered}}
++n) {
label:
return x; // expected-warning {{sometimes uninit}}
}
x = 1;
goto label;
}
int test_for_range_false(int k) {
int arr[3] = { 1, 2, 3 };
int x; // expected-note {{variable}}
for (int &a : arr) { // expected-note {{whenever 'for' loop exits because its condition is false}}
if (a == k) {
x = &a - arr;
break;
}
}
return x; // expected-warning {{sometimes uninit}}
}
int test_for_range_true(int k) {
int arr[3] = { 1, 2, 3 };
int x; // expected-note {{variable}}
for (int &a : arr) { // expected-note {{whenever 'for' loop is entered}}
goto label;
}
x = 0;
label:
return x; // expected-warning {{sometimes uninit}}
}
int test_conditional_false(int k) {
int x; // expected-note {{variable}}
(void)(
maybe() // expected-note {{whenever '?:' condition is false}}
? x = 1 : 0);
return x; // expected-warning {{sometimes uninit}}
}
int test_conditional_true(int k) {
int x; // expected-note {{variable}}
(void)(
maybe() // expected-note {{whenever '?:' condition is true}}
? 0 : x = 1);
return x; // expected-warning {{sometimes uninit}}
}
int test_logical_and_false(int k) {
int x; // expected-note {{variable}}
maybe() // expected-note {{whenever '&&' condition is false}}
&& (x = 1);
return x; // expected-warning {{sometimes uninit}}
}
int test_logical_and_true(int k) {
int x; // expected-note {{variable}}
maybe() // expected-note {{whenever '&&' condition is true}}
&& ({ goto skip_init; 0; });
x = 1;
skip_init:
return x; // expected-warning {{sometimes uninit}}
}
int test_logical_or_false(int k) {
int x; // expected-note {{variable}}
maybe() // expected-note {{whenever '||' condition is false}}
|| ({ goto skip_init; 0; });
x = 1;
skip_init:
return x; // expected-warning {{sometimes uninit}}
}
int test_logical_or_true(int k) {
int x; // expected-note {{variable}}
maybe() // expected-note {{whenever '||' condition is true}}
|| (x = 1);
return x; // expected-warning {{sometimes uninit}}
}
int test_switch_case(int k) {
int x; // expected-note {{variable}}
switch (k) {
case 0:
x = 0;
break;
case 1: // expected-note {{whenever switch case is taken}}
break;
}
return x; // expected-warning {{sometimes uninit}}
}
int test_switch_default(int k) {
int x; // expected-note {{variable}}
switch (k) {
case 0:
x = 0;
break;
case 1:
x = 1;
break;
default: // expected-note {{whenever switch default is taken}}
break;
}
return x; // expected-warning {{sometimes uninit}}
}
int test_switch_suppress_1(int k) {
int x;
switch (k) {
case 0:
x = 0;
break;
case 1:
x = 1;
break;
}
return x; // no-warning
}
int test_switch_suppress_2(int k) {
int x;
switch (k) {
case 0:
case 1:
switch (k) {
case 0:
return 0;
case 1:
return 1;
}
case 2:
case 3:
x = 1;
}
return x; // no-warning
}
int test_multiple_notes(int k) {
int x; // expected-note {{variable}}
if (k > 0) {
if (k == 5)
x = 1;
else if (k == 2) // expected-note {{whenever 'if' condition is false}}
x = 2;
} else {
if (k == -5)
x = 3;
else if (k == -2) // expected-note {{whenever 'if' condition is false}}
x = 4;
}
return x; // expected-warning {{sometimes uninit}}
}
int test_no_false_positive_1(int k) {
int x;
if (k)
x = 5;
while (!k)
maybe();
return x;
}
int test_no_false_positive_2() {
int x;
bool b = false;
if (maybe()) {
x = 5;
b = true;
}
return b ? x : 0;
}
void test_null_pred_succ() {
int x; // expected-note {{variable}}
if (0) // expected-note {{whenever}}
foo: x = 0;
if (x) // expected-warning {{sometimes uninit}}
goto foo;
}
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