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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - IndVarSimpify does not eliminate dead-loops with variant induction variable."
href="http://bugs.llvm.org/show_bug.cgi?id=32632">32632</a>
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<th>Summary</th>
<td>IndVarSimpify does not eliminate dead-loops with variant induction variable.
</td>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
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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
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<th>Component</th>
<td>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>farhana.aleen@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>IndVarSimplify does not handle dead-loops with variant induction variables.
It does not eliminate the comparison if the iv is loop-variant such as j in the
program below.
Here is the program of the
#define N 100
unsigned int b[N], a[N];
void foo() {
unsigned int i, j, k;
for (i = 84; i > 1; i--)
// dead-loop
for (j = i; j < i; j++)
for (k = 1; k < 7; k++)
a[i] = b[k];
}</pre>
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