1651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines// RUN: %clang_cc1 -verify -fsyntax-only -Wshadow -Wold-style-cast %s 2651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 3651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines// Test that macro expansions from system headers don't trigger 'syntactic' 4651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines// warnings that are not actionable. 5651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 6651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#ifdef IS_SYSHEADER 7651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#pragma clang system_header 8651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 9651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#define SANITY(a) (a / 0) 10651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 11651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#define SHADOW(a) __extension__({ int v = a; v; }) 12651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 13651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#define OLD_STYLE_CAST(a) ((int) (a)) 14651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 15651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#else 16651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 17651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#define IS_SYSHEADER 18651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#include __FILE__ 19651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 20651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesvoid testSanity() { 21651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Validate that the test is set up correctly 22651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines int i = SANITY(0); // expected-warning {{division by zero is undefined}} 23651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines} 24651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 25651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesvoid PR16093() { 26651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // no -Wshadow in system macro expansion 27651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines int i = SHADOW(SHADOW(1)); 28651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines} 29651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 30651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesvoid PR18147() { 31651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // no -Wold_style_cast in system macro expansion 32651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines int i = OLD_STYLE_CAST(0); 33651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines} 34651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 35651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#endif 36