llvm-project/llvm/test/FrontendC++/varargs.cpp

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C++

// RUN: %llvmgxx -S -emit-llvm %s -o - | FileCheck %s
// rdar://7309675
// PR4678
// test1 should be compmiled to be a varargs function in the IR even
// though there is no way to do a va_begin. Otherwise, the optimizer
// will warn about 'dropped arguments' at the call site.
// CHECK: define i32 @_Z5test1z(...)
int test1(...) {
return -1;
}
// CHECK: call i32 (...)* @_Z5test1z(i32 0)
void test() {
test1(0);
}