File: attr-musttail.c

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llvm-toolchain-18 1%3A18.1.8-18
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// RUN: %clang_cc1 -verify -fsyntax-only %s

int NotAProtoType(); // expected-note{{add 'void' to the parameter list to turn an old-style K&R function declaration into a prototype}}
int TestCalleeNotProtoType(void) {
  __attribute__((musttail)) return NotAProtoType(); // expected-error{{'musttail' attribute requires that both caller and callee functions have a prototype}}
}

int ProtoType(void);
int TestCallerNotProtoType() {                  // expected-note{{add 'void' to the parameter list to turn an old-style K&R function declaration into a prototype}}
  __attribute__((musttail)) return ProtoType(); // expected-error{{'musttail' attribute requires that both caller and callee functions have a prototype}}
}

int TestProtoType(void) {
  return ProtoType();
}