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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Generate conjunction or disjunction condition to reduce ISL Ast duplication"
href="https://llvm.org/bugs/show_bug.cgi?id=27559">27559</a>
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<th>Summary</th>
<td>Generate conjunction or disjunction condition to reduce ISL Ast duplication
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<th>Product</th>
<td>Polly
</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
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>isl
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<th>Assignee</th>
<td>polly-dev@googlegroups.com
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<th>Reporter</th>
<td>zinob@codeaurora.org
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>The testcase is a unit test:
test/Isl/CodeGen/pointer-type-pointer-type-comparison.ll
produced Isl AST:
; CHECK: if (Q >= P + 1) {
; CHECK: for (int c0 = 0; c0 < N; c0 += 1)
; CHECK: Stmt_store(c0);
; CHECK: } else if (P >= Q + 1)
; CHECK: for (int c0 = 0; c0 < N; c0 += 1)
; CHECK: Stmt_store(c0);
; CHECK: }
In some cases the duplication is severe and it end up impacting compile-time
and code size (LLVM optimization will not CSE the code).</pre>
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</p>
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