xref: /llvm-project/clang/test/Misc/warn-in-system-macro-def.c (revision f6e77311502c091f5fad236be5b830801ec13332) 
1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -isystem %S -Wdouble-promotion -fsyntax-only %s  2>&1 | FileCheck -allow-empty %s
2 // CHECK: warning:
3 // CHECK: expanded from macro 'ISNAN'
4 // CHECK: expanded from macro 'isnan'
5 
6 #include <warn-in-system-macro-def.c.inc>
7 
8 #define isnan(x) \
9 	(sizeof (x) == sizeof (float)                \
10 	? __isnanf (x)                    \
11 	: sizeof (x) == sizeof (double)               \
12 	? __isnan (x) : __isnanl (x))
13 
main(void)14 int main(void)
15 {
16 	double foo = 1.0;
17 
18 	if (ISNAN(foo))
19 		return 1;
20 	return 0;
21 }
22