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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Crash as exhaust the stack in unroll loops while recursion call createSCEV"
href="https://bugs.llvm.org/show_bug.cgi?id=50783">50783</a>
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<th>Summary</th>
<td>Crash as exhaust the stack in unroll loops while recursion call createSCEV
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>11.0
</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: ARM
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>zhongyunde@tom.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, smithp352@googlemail.com, Ties.Stuij@arm.com
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<p>
<div>
<pre>When compile with -O3, it is tried to complete unroll the loops, then it crash
as the recursion call of function createSCEV to deep, and exhaust the stack.
clang -mcpu=tsv110 -O3 test-creduce6.c
2. Per-module optimization passes
3. Running pass 'Function Pass Manager' on module 'test-creduce6.c'.
4. Running pass 'Loop Pass Manager' on function '@foo'
5. Running pass 'Unroll loops' on basic block '%for.cond1.preheader
=================== test case =============================
~/test/issue2292 ยป cat test-creduce6.c
zyd@bisheng-develop
char a;
long b, c;
int d;
short foo() {
for (c = 2; c; c++) {
for (b = 10; b < 35; b++) {
int *g = &d;
*g |= 8;
for (a = 8; a < 76; a++) {
g = &c;
c *= *g;
}
}
}
return 0;
}</pre>
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