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    <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 - Invalid address space cast in C++17 mode (CastConsistency assertion failure)"
   href="https://bugs.llvm.org/show_bug.cgi?id=41276">41276</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Invalid address space cast in C++17 mode (CastConsistency assertion failure)
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>8.0
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </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>C++
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>bruno-llvm@defraine.net
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Hi,

The following code triggers an assertion failure in clang-8 when compiling in
C++17 mode:

$ cat test.cpp

struct MyType {
    MyType(int i): i(i) { }
    int i;
};

MyType __attribute__((address_space(10))) m = 123;

$ clang -S -std=c++17 test.cpp

clang/lib/AST/Expr.cpp:1685: bool clang::CastExpr::CastConsistency() const:
Assertion `!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() !=
SETy.getAddressSpace()' failed.

Godbolt segfault: <a href="https://godbolt.org/z/P4GXmF">https://godbolt.org/z/P4GXmF</a>

This issue seems to have been introduced by this commit:

<a href="https://github.com/llvm/llvm-project/commit/04307941e2b16cd78347b90418204d84b584c49e">https://github.com/llvm/llvm-project/commit/04307941e2b16cd78347b90418204d84b584c49e</a>

I think the old behavior was to create a CK_NoOp cast, while
PerformQualificationConversion will now create a CK_AddressSpaceConversion, but
this does not seem warranted?

Regards,
Bruno</pre>
        </div>
      </p>


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