<html>
    <head>
      <base href="http://llvm.org/bugs/" />
    </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 --- - clang-cl: cannot compile this unexpected cast lvalue yet in inline assembly"
   href="http://llvm.org/bugs/show_bug.cgi?id=20201">20201</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>clang-cl: cannot compile this unexpected cast lvalue yet in inline assembly
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </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>-New Bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>ehsan@mozilla.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>$ cat test.cpp
#include <stdint.h>

typedef __declspec(align(16)) uint32_t uvec32[4];

static uvec32 kHash16x33 = { 0x92d9e201, 0, 0, 0 }; // 33 ^ 16
static uvec32 kHashMul3 = {
  0x00008c61, // 33 ^ 3
  0x00000441, // 33 ^ 2
  0x00000021, // 33 ^ 1
  0x00000001, // 33 ^ 0
};

uint32_t HashDjb2_SSE41(const uint8_t* src) {
  uint32_t hash;
  asm volatile ( // NOLINT
    "movd      %%xmm0,%3                       \n"
  : "+r"(src), // %0
    "=g"(hash) // %3
  : "m"(kHash16x33), // %4
    "m"(kHashMul3) // %8
  : "memory", "cc"
    , "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7"
  ); // NOLINT
  return hash;
}


$ clang-cl -c test.cpp
test.cpp(19,9) :  error: cannot compile this unexpected cast lvalue yet
  : "m"(kHash16x33), // %4
        ^~~~~~~~~~
test.cpp(20,9) :  error: cannot compile this unexpected cast lvalue yet
    "m"(kHashMul3) // %8
        ^~~~~~~~~
2 errors generated.</pre>
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