<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/117697>117697</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Incorrect Runtime Result with Function Overloading (Correct with gcc)
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          lfeng14
      </td>
    </tr>
</table>

<pre>
    # Title: Incorrect Runtime Result with Function Overloading (Correct with gcc)

When compiling with llvm, the runtime result is incorrect. The minimal code example is as follows:

```cpp
// main.cpp
#include <iostream>
#include <stdio.h>
#include "file.h"
int abc(char* a, char* b, bool c){
return 1;
}
int abc(bool a, bool b, char* c){
return 2;
}
int main(){
printf("%d\n",abc("his" ,"sophic"));
return 0;
}

// file.h
int abc(char* a, char* b, bool c=false);
int abc(bool a, bool b, char* c="his");
```
The build commands are as follows:
For llvm: `clang++ -o llvm_output main.cpp`
For gcc: `g++ -o gcc_output main.cpp`

When compiling with gcc, the runtime result is correct，result is 1, but clang result is 2.
It seems there is a problem with llvm's handling of function overloading that leads to incorrect runtime behavior compared to gcc. 
</pre>
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