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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - scalarizer makes function broken with "opt -loop-rotate -slp-vectorizer -licm -early-cse-memssa -sroa -jump-threading -scalarizer""
href="https://bugs.llvm.org/show_bug.cgi?id=41723">41723</a>
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<th>Summary</th>
<td>scalarizer makes function broken with "opt -loop-rotate -slp-vectorizer -licm -early-cse-memssa -sroa -jump-threading -scalarizer"
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<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>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>cszide@163.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21887" name="attach_21887" title=".bc file of the source code">attachment 21887</a> <a href="attachment.cgi?id=21887&action=edit" title=".bc file of the source code">[details]</a></span>
.bc file of the source code
$clang -v
clang version 9.0.0 (trunk 355281)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -mllvm -disable-llvm-optzns small.c
$opt -loop-rotate -slp-vectorizer -licm -early-cse-memssa -sroa -jump-threading
-scalarizer small.bc -o small-opt.bc
PHI nodes not grouped at top of basic block!
%9 = phi i8 [ 6, %7 ], [ %9, %5 ]
label %8
in function c
LLVM ERROR: Broken function found, compilation aborted!
without scalarizer pass, opt works fine.
$opt -loop-rotate -slp-vectorizer -licm -early-cse-memssa -sroa -jump-threading
small.bc -o small-opt.bc
--------------------------------------------
int a, b;
int c() {
for (; 1;)
if (b) {
int d = 0;
a = 3;
for (; a > 8; ++a)
if (d) {
long int e[] = {0, 1, 1, 0, 1};
for (d = 6; 0;)
;
}
}
}</pre>
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