<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - error in backend: Functions with 'no-prototype' attribute should not have params"
   href="https://bugs.llvm.org/show_bug.cgi?id=42420">42420</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>error in backend: Functions with 'no-prototype' attribute should not have params
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>new bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>ethanoldale@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=22150" name="attach_22150" title="the run script">attachment 22150</a> <a href="attachment.cgi?id=22150&action=edit" title="the run script">[details]</a></span>
the run script

error in backend: Functions with 'no-prototype' attribute should not have
params: make_foo

to reproduce:
emcc foo.c

foo.c:
        struct foo {
                int bar, baz;
        };

        struct foo make_foo();

        void test()
        {
                struct foo foo = make_foo();
        }

expected behaviour:
successfull compilation

actual behaviour:
backend error

Emscripten version: 1.38.34
clang version: 9.0.0
system: ArchLinux

the error doesn't happen if foo only has one int or if make_foo is defined
in the same translation unit.
the code compiles fine if the target is x86_64, but fails when targeting
webassembly


emcc output:
fatal error: error in backend: Functions with 'no-prototype' attribute should
not have params: make_foo
clang-9: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
clang version 9.0.0 (/startdir/llvm-project
58dbe47b9c64bafcc8b430e8bfea92f7fe641c8e)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /usr/lib/emscripten-llvm
clang-9: note: diagnostic msg: PLEASE submit a bug report to
<a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash backtrace, preprocessed source,
and associated run script.
clang-9: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-9: note: diagnostic msg: /tmp/foo-998150.c
clang-9: note: diagnostic msg: /tmp/foo-998150.sh
clang-9: note: diagnostic msg:

********************
shared:ERROR: compiler frontend failed to generate LLVM bitcode, halting</pre>
        </div>
      </p>


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