forked from OSchip/llvm-project
205 lines
6.7 KiB
C
205 lines
6.7 KiB
C
// RUN: %clang_analyze_cc1 -std=c99 -Dbool=_Bool -analyzer-checker=core,alpha.core.TestAfterDivZero -analyzer-output=text -verify -analyzer-config eagerly-assume=false %s
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// RUN: %clang_analyze_cc1 -x c++ -analyzer-checker=core,alpha.core.TestAfterDivZero -analyzer-output=text -verify -analyzer-config eagerly-assume=false %s
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int var;
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void err_eq(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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if (x == 0) { } // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_eq2(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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if (0 == x) { } // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_ne(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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if (x != 0) { } // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_ge(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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if (x >= 0) { } // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_le(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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if (x <= 0) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_yes(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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if (x) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_not(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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if (!x) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_pnot(int x) {
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int *y = &x;
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var = 77 / *y; // expected-note {{Division with compared value made here}}
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if (!x) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_pnot2(int x) {
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int *y = &x;
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var = 77 / x; // expected-note {{Division with compared value made here}}
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if (!*y) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_ppnot(int x) {
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int *y = &x;
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int **z = &y;
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var = 77 / **z; // expected-note {{Division with compared value made here}}
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if (!x) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_orig_checker(int x) {
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if (x != 0) // expected-note {{Assuming 'x' is equal to 0}} expected-note {{Taking false branch}}
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return;
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var = 77 / x; // expected-warning {{Division by zero}} expected-note {{Division by zero}}
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if (!x) {} // no-warning
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}
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void ok_other(int x, int y) {
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var = 77 / y;
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if (x == 0) {
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}
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}
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void ok_assign(int x) {
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var = 77 / x;
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x = var / 77; // <- assignment => don't warn
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if (x == 0) {
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}
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}
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void ok_assign2(int x) {
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var = 77 / x;
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x = var / 77; // <- assignment => don't warn
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if (0 == x) {
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}
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}
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void ok_dec(int x) {
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var = 77 / x;
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x--; // <- assignment => don't warn
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if (x == 0) {
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}
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}
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void ok_inc(int x) {
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var = 77 / x;
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x++; // <- assignment => don't warn
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if (x == 0) {
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}
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}
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void do_something_ptr(int *x);
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void ok_callfunc_ptr(int x) {
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var = 77 / x;
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do_something_ptr(&x); // <- pass address of x to function => don't warn
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if (x == 0) {
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}
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}
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void do_something(int x);
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void nok_callfunc(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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do_something(x);
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if (x == 0) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void ok_if(int x) {
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if (x > 3)
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var = 77 / x;
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if (x == 0) {
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}
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}
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void ok_if2(int x) {
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if (x < 3)
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var = 77 / x;
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if (x == 0) {
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} // TODO warn here
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}
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void ok_pif(int x) {
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int *y = &x;
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if (x < 3)
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var = 77 / *y;
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if (x == 0) {
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} // TODO warn here
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}
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int getValue(bool *isPositive);
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void use(int a);
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void foo(void) {
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bool isPositive;
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int x = getValue(&isPositive);
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if (isPositive) {
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use(5 / x);
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}
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if (x == 0) {
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}
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}
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int getValue2(void);
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void foo2(void) {
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int x = getValue2();
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int y = x;
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use(5 / x); // expected-note {{Division with compared value made here}}
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if (y == 0) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void ok_while(int x) {
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int n = 100 / x;
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while (x != 0) { // <- do not warn
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x--;
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}
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}
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void err_not2(int x, int y) {
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int v;
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var = 77 / x;
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if (y)
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v = 0;
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if (!x) {
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} // TODO warn here
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}
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inline void inline_func(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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if (x == 0) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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void err_inline(int x) {
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var = 77 / x;
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inline_func(x); // expected-note {{Calling 'inline_func'}}
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if (x == 0) {
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}
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}
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inline void inline_func2(int x) {}
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void err_inline2(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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inline_func2(x);
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if (x == 0) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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inline void inline_func3(int x) {
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var = 77 / x;
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}
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void ok_inline(int x) {
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var = 77 / x; // expected-note {{Division with compared value made here}}
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inline_func3(x);
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if (x == 0) {} // expected-warning {{Value being compared against zero has already been used for division}}
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} // expected-note@-1 {{Value being compared against zero has already been used for division}}
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