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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - After r329657, error in backend: Cannot lower EFLAGS copy that lives out of a basic block!"
href="https://bugs.llvm.org/show_bug.cgi?id=37133">37133</a>
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<th>Summary</th>
<td>After r329657, error in backend: Cannot lower EFLAGS copy that lives out of a basic block!
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>new bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dimitry@andric.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>After <a href="https://reviews.llvm.org/rL329657">https://reviews.llvm.org/rL329657</a> ("[x86] Introduce a pass to begin more
systematically fixing PR36028 and similar issues"), which is part of a fix for
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Incorrect use of pushf/popf enables/disables interrupts on amd64 kernels"
href="show_bug.cgi?id=36028">bug 36028</a>, building libssh on i386-freebsd results in:
fatal error: error in backend: Cannot lower EFLAGS copy that lives out of a
basic block!
cc: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
Minimized test case:
/* clang -cc1 -triple i386 -S -debug-info-kind=standalone -O1 krl-minimized.c
*/
int a, b;
unsigned long long c;
void e() {
long long d;
b = 33;
d = a;
if (c < a) {
b = 32;
d = c;
}
if (d)
b = 2;
}
Note that the -debug-info-kind=standalone option is important, if that is left
out, the backend error does not occur!</pre>
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