forked from OSchip/llvm-project
102 lines
2.0 KiB
C++
102 lines
2.0 KiB
C++
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -Wunreachable-code-aggressive -fblocks -verify %s
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int j;
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int bar();
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int test1() {
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for (int i = 0;
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i != 10;
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++i) { // expected-warning {{loop will run at most once (loop increment never executed)}}
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if (j == 23) // missing {}'s
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bar();
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return 1;
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}
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return 0;
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return 1; // expected-warning {{will never be executed}}
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}
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int test1_B() {
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for (int i = 0;
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i != 10;
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++i) { // expected-warning {{loop will run at most once (loop increment never executed)}}
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if (j == 23) // missing {}'s
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bar();
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return 1;
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}
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return 0;
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return bar(); // expected-warning {{will never be executed}}
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}
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void test2(int i) {
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switch (i) {
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case 0:
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break;
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bar(); // expected-warning {{will never be executed}}
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case 2:
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switch (i) {
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default:
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a: goto a;
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}
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bar(); // expected-warning {{will never be executed}}
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}
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b: goto b;
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bar(); // expected-warning {{will never be executed}}
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}
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void test3() {
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^{ return;
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bar(); // expected-warning {{will never be executed}}
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}();
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while (++j) {
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continue;
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bar(); // expected-warning {{will never be executed}}
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}
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}
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// PR 6130 - Don't warn about bogus unreachable code with throw's and
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// temporary objects.
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class PR6130 {
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public:
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PR6130();
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~PR6130();
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};
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int pr6130(unsigned i) {
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switch(i) {
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case 0: return 1;
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case 1: return 2;
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default:
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throw PR6130(); // no-warning
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}
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}
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extern "C" void foo(void);
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extern "C" __attribute__((weak)) decltype(foo) foo;
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void weak_redecl() {
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if (foo)
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return;
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bar(); // no-warning
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}
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namespace pr52103 {
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void g(int a);
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void f(int a) {
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if (a > 4) [[ likely ]] { // no-warning
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return;
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}
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if (a > 4) [[ unlikely ]] { // no-warning
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return;
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return; // expected-warning {{will never be executed}}
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}
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[[clang::musttail]] return g(a); // no-warning
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[[clang::musttail]] return g(a); // expected-warning {{will never be executed}}
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}
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}
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