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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [X86][RTM] XBEGIN causes machine verifier errors"
href="https://bugs.llvm.org/show_bug.cgi?id=33028">33028</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[X86][RTM] XBEGIN causes machine verifier errors
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: X86
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>llvm-dev@redking.me.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>asaf.badouh@intel.com, craig.topper@gmail.com, llvm-bugs@lists.llvm.org, michael.hliao@gmail.com
</td>
</tr>
<tr>
<th>Blocks</th>
<td>27481
</td>
</tr></table>
<p>
<div>
<pre>\llvm\test\CodeGen\X86\rtm.ll
Adding -verify-machineinstrs to the rtm.ll test file machine verifier errors:
# After Expand ISel Pseudo-instructions
# Machine code for function test_xbegin: IsSSA, TracksLiveness
BB#0: derived from LLVM BB %entry
XBEGIN_4 <BB#2>, %EAX<imp-def>
Successors according to CFG: BB#1(?%) BB#2(?%)
BB#1: derived from LLVM BB %entry
Predecessors according to CFG: BB#0
%EAX<def> = MOV32ri -1
Successors according to CFG: BB#2(?%)
BB#2: derived from LLVM BB %entry
Live Ins: %EAX
Predecessors according to CFG: BB#0 BB#1
%vreg0<def> = COPY %EAX; GR32:%vreg0
%EAX<def> = COPY %vreg0; GR32:%vreg0
RET 0, %EAX
# End machine code for function test_xbegin.
*** Bad machine code: MBB has allocatable live-in, but isn't entry or
landing-pa
d. ***
- function: test_xbegin
- basic block: BB#2 entry (0x2527150)
LLVM ERROR: Found 1 machine code errors.</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_NEW "
title="NEW - X86 make check has a bunch of machine verifier errors"
href="https://bugs.llvm.org/show_bug.cgi?id=27481">Bug 27481</a>] X86 make check has a bunch of machine verifier errors
</li>
</ul>
</div>
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