clang/test/CodeGen/builtin-redeclaration.c

   1 // RUN: %clang_cc1 -emit-llvm-only %s
   2
   3 // PR45410
   4 // Ensure we mark local extern redeclarations with a different type as non-builtin.
   5 void non_builtin() {
   6   extern float exp();
   7   exp(); // Will crash due to wrong number of arguments if this calls the builtin.
   8 }
   9
  10 // PR45410
  11 // We mark exp() builtin as const with -fno-math-errno (default).
  12 // We mustn't do that for extern redeclarations of builtins where the type differs.
  13 float attribute() {
  14   extern float exp();
  15   return exp(1);
  16 }