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// RUN: %clang_cc1 -isystem %S -Wdouble-promotion -fsyntax-only %s 2>&1 | FileCheck -allow-empty %s // CHECK-NOT: warning: #include <no-warn-in-system-macro.c.inc> int main(void) { double foo = 1.0; if (isnan(foo)) return 1; return 0; }