| // RUN: clang -fsyntax-only -verify -fno-math-errno %s |
| |
| int foo(int X, int Y); |
| |
| double sqrt(double X); // implicitly const because of -fno-math-errno! |
| |
| void bar(volatile int *VP, int *P, int A, |
| _Complex double C, volatile _Complex double VC) { |
| |
| VP == P; // expected-warning {{expression result unused}} |
| (void)A; |
| (void)foo(1,2); // no warning. |
| |
| A == foo(1, 2); // expected-warning {{expression result unused}} |
| |
| foo(1,2)+foo(4,3); // expected-warning {{expression result unused}} |
| |
| |
| *P; // expected-warning {{expression result unused}} |
| *VP; // no warning. |
| P[4]; // expected-warning {{expression result unused}} |
| VP[4]; // no warning. |
| |
| __real__ C; // expected-warning {{expression result unused}} |
| __real__ VC; |
| |
| // We know this can't change errno because of -fno-math-errno. |
| sqrt(A); // expected-warning {{expression result unused}} |
| } |
| |
| extern void t1(); |
| extern void t2(); |
| void t3(int c) { |
| c ? t1() : t2(); |
| } |
| |
| // This shouldn't warn: the expr at the end of the stmtexpr really is used. |
| int stmt_expr(int x, int y) { |
| return ({int _a = x, _b = y; _a > _b ? _a : _b; }); |
| } |
| |
| void nowarn(unsigned char* a, unsigned char* b) |
| { |
| unsigned char c = 1; |
| *a |= c, *b += c; |
| } |