llvm-project/clang/test/Analysis/unreachable-code-path.c

56 lines
873 B
C

// RUN: %clang_cc1 -analyze -analyzer-experimental-checks -analyzer-check-objc-mem -analyzer-check-dead-stores -verify -analyzer-opt-analyze-nested-blocks %s
extern void foo(int a);
void test(unsigned a) {
switch (a) {
a += 5; // expected-warning{{never executed}}
case 2:
a *= 10;
case 3:
a %= 2;
}
foo(a);
}
void test2(unsigned a) {
help:
if (a > 0)
return;
if (a == 0)
return;
foo(a); // expected-warning{{never executed}}
goto help;
}
void test3() {
int a = 5;
while (a > 1)
a -= 2;
if (a > 1) {
a = a + 56; // expected-warning{{never executed}}
}
foo(a);
}
void test4(unsigned a) {
while(1);
if (a > 5) { // expected-warning{{never executed}}
return;
}
}
extern void bar(char c);
void test5(const char *c) {
foo(c[0]);
if (!c) {
bar(1); // expected-warning{{never executed}}
}
}