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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 - sroa makes function broken with "opt -slp-vectorizer -gvn -inline -scalarizer -sroa small.bc -o small-opt.bc""
href="https://bugs.llvm.org/show_bug.cgi?id=42450">42450</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>sroa makes function broken with "opt -slp-vectorizer -gvn -inline -scalarizer -sroa small.bc -o small-opt.bc"
</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>Linux
</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>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=22167" name="attach_22167" title=".bc file of the source code">attachment 22167</a> <a href="attachment.cgi?id=22167&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 363125)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/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/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -femit-all-decls -mllvm -disable-llvm-optzns small.c
$opt -slp-vectorizer -gvn -inline -scalarizer -sroa small.bc -o small-opt.bc
PHI nodes not grouped at top of basic block!
%p.2.i = phi i32 [ %p.2.i, %for.body18.i ], [ %p.2.i, %for.body21.i ]
label %for.cond19.i
in function j
LLVM ERROR: Broken function found, compilation aborted!
-----------------------------------------------
long a, b;
short c;
int d, e;
void(f)();
void(g)();
void(h)();
unsigned i();
void j() { i(); }
unsigned i() {
short k = 0;
l:
for (d = 4; d;)
for (; k <= 1;) {
k;
f();
}
{
unsigned m;
if (b)
goto l;
0 > k;
if (0 == 0)
;
else {
k;
k &k;
n:
k;
for (; 4; k)
k;
k;k;k;k;k;k;
}
for (; c;)
for (; a;) {
int o[50] = {8, 8, 8, 8};
int p;
g(k);
for (; 0;) {
p = k && p;
k;
}
}
h(k);
if (e)
return 0;
}
return 0;
}</pre>
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