<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 --- - Mips64el crash when using __uint128_t"
   href="http://llvm.org/bugs/show_bug.cgi?id=22215">22215</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Mips64el crash when using __uint128_t
          </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>james410@cowgill.org.uk
          </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>Found while attempting to compile libdispatch on mips64el.
<a href="https://tracker.debian.org/pkg/libdispatch">https://tracker.debian.org/pkg/libdispatch</a>
<a href="http://mipsdebian.imgtec.com/debian/logs/libd/libdispatch/libdispatch_0~svn197-3.3_mips64el-20150113-1543.build.gz">http://mipsdebian.imgtec.com/debian/logs/libd/libdispatch/libdispatch_0~svn197-3.3_mips64el-20150113-1543.build.gz</a>

Compiling this testcase (generated by creduce):

__uint128_t a;
b;
fn1() { a *= b; }

With clang like this:
clang-3.6 -target mips64el-unknown-linux-gnuabi64 test.c

Gives this error:
fatal error: error in backend: Cannot select: 0x277a470: i64,i64 = umul_lohi
0x27772e0, 0x277a140 [ORD=6] [ID=17]
  0x27772e0: i64,ch = load 0x275b200, 0x277acf0, 0x27773f0<LD8[@a](align=16)>
[ORD=5] [ID=13]
    0x277acf0: i64,ch = load 0x275b200, 0x2777b60, 0x27773f0<LD8[GOT]> [ORD=5]
[ID=11]
      0x2777b60: i64 = MipsISD::Wrapper 0x2777940, 0x277a250 [ORD=5] [ID=9]
        0x2777940: i64 = Register %vreg0 [ID=7]
        0x277a250: i64 = TargetGlobalAddress<i128* @a> 0 [TF=16] [ORD=5] [ID=6]
      0x27773f0: i64 = undef [ID=1]
    0x27773f0: i64 = undef [ID=1]
  0x277a140: i64,ch = load 0x275b200, 0x277b340, 0x27773f0<LD4[@b], sext from
i32> [ORD=4] [ID=15]
    0x277b340: i64,ch = load 0x275b200, 0x277b230, 0x27773f0<LD8[GOT]> [ORD=3]
[ID=12]
      0x277b230: i64 = MipsISD::Wrapper 0x2777940, 0x2777720 [ORD=3] [ID=10]
        0x2777940: i64 = Register %vreg0 [ID=7]
        0x2777720: i64 = TargetGlobalAddress<i32* @b> 0 [TF=16] [ORD=3] [ID=8]
      0x27773f0: i64 = undef [ID=1]
    0x27773f0: i64 = undef [ID=1]
In function: fn1
clang: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
Debian clang version 3.6.0-svn224810-1 (trunk) (based on LLVM 3.6.0)</pre>
        </div>
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