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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [X86] X86FlagsCopyLowering - Unlowered EFLAGS copy!"
href="https://bugs.llvm.org/show_bug.cgi?id=43189">43189</a>
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<th>Summary</th>
<td>[X86] X86FlagsCopyLowering - Unlowered EFLAGS copy!
</td>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: X86
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>llvm-dev@redking.me.uk
</td>
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<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, spatel+llvm@rotateright.com
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<div>
<pre>Reduced from <a href="https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16605">https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16605</a>
define void @ossfuzz16605() {
entry:
%C33 = fcmp true float 0x36A0000000000000, 0x36A0000000000000
%B43 = or i1 %C33, true
br i1 %B43, label %bb2, label %bb8
bb8: ; preds = %bb8, %bb7
%C19 = icmp sgt i128 undef, 18446744073709551616
%G21 = getelementptr i128, i128* null, i1 %C19
store i128* %G21, i128** undef
br i1 %C19, label %bb8, label %bb2
bb2: ; preds = %bb8
unreachable
}
llc -mtriple=x86_64--
Unlowered EFLAGS copy!
UNREACHABLE executed at
C:\LLVM\llvm-project\llvm\lib\Target\X86\X86FlagsCopyLowering.cpp:707!
Stack dump:
0. Program arguments: C:\LLVM\build\Debug\bin\llc.exe -mtriple=x86_64--
-mcpu=btver2 -o bar.s fuzz.ll
1. Running pass 'Function Pass Manager' on module 'fuzz.ll'.
2. Running pass 'X86 EFLAGS copy lowering' on function '@ossfuzz16605'</pre>
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