<html>

    <head>

      <base href="https://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 --- - Bugpoint's basic block extraction produce codes that get rejected by the verifier"

   href="https://llvm.org/bugs/show_bug.cgi?id=28803">28803</a>

          </td>

        </tr>

        <tr>

          <th>Summary</th>

          <td>Bugpoint's basic block extraction produce codes that get rejected by the verifier

          </td>

        </tr>

        <tr>

          <th>Product</th>

          <td>tools

          </td>

        </tr>

        <tr>

          <th>Version</th>

          <td>trunk

          </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>bugpoint

          </td>

        </tr>

        <tr>

          <th>Assignee</th>

          <td>unassignedbugs@nondot.org

          </td>

        </tr>

        <tr>

          <th>Reporter</th>

          <td>feishenniubi@gmail.com

          </td>

        </tr>

        <tr>

          <th>CC</th>

          <td>llvm-bugs@lists.llvm.org

          </td>

        </tr>

        <tr>

          <th>Classification</th>

          <td>Unclassified

          </td>

        </tr></table>

      <p>

        <div>

        <pre>This is a direct follow-up of <a class="bz_bug_link 

          bz_status_RESOLVED  bz_closed"

   title="RESOLVED FIXED - DwarfEHPrepare pass crashed when trying to obtain function personality"

   href="show_bug.cgi?id=28799">https://llvm.org/bugs/show_bug.cgi?id=28799</a> 

ResumeInst needs to be in a function with a personality. However, bugpoint

doesn't respect that constraint when trying to perform basic block extraction.

Here's how I got the error:

<span class="quote">> bugpoint -run-llc -safe-run-llc test.ll -loop-unroll -gcc=clang++</span >

And here's the output:

Read input file      : 'test.ll'

*** All input ok

Running selected passes on program to test for crash: Success!

Initializing execution environment: Found llc:

/home/grieve/LLVM/GSoC/Testing/debugBuild/bin/llc

Running the code generator to test for a crash: <llc>

Generating reference output from raw program: <llc><llc><CC><program>

Reference output is: bugpoint.reference.out-9b386e1

*** Checking the code generator...

<llc><CC><program>

*** Output matches: Debugging miscompilation!

Checking to see if '' compiles correctly: <llc><CC><program> yup.

Checking to see if '-loop-unroll' compiles correctly: <llc><CC><program> nope.

*** Found miscompiling pass: -loop-unroll

Emitted bitcode to 'bugpoint-passinput.bc'

*** You can reproduce the problem with: opt bugpoint-passinput.bc -loop-unroll

Checking to see if the program is misoptimized when these functions are run

through the pass: main _ZNSt5dequeIdSaIdEE18_M_fill_initializeERKd

_ZNSt11_Deque_baseIdSaIdEE17_M_initialize_mapEm

_ZNSt11_Deque_baseIdSaIdEE15_M_create_nodesEPPdS3_ __clang_call_terminate