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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [AArch64] Greedy load/store optimizer misses pairing opportunities"
href="https://llvm.org/bugs/show_bug.cgi?id=26879">26879</a>
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<th>Summary</th>
<td>[AArch64] Greedy load/store optimizer misses pairing opportunities
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</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
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<th>Component</th>
<td>Backend: AArch64
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>mcrosier@codeaurora.org
</td>
</tr>
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<th>CC</th>
<td>junbuml@codeaurora.org, llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Given the below example we only form a single stp, when two stps are possible.
define void @test(i32 %a, i32 %b, i32 %c, i32 %d, i32* %base) {
entry:
%a1 = getelementptr inbounds i32, i32* %base, i64 0
%b1 = getelementptr i32, i32* %a1, i64 1
%c1 = getelementptr i32, i32* %a1, i64 2
%d1 = getelementptr i32, i32* %a1, i64 3
store i32 %c, i32 * %c1
store i32 %a, i32 * %a1
store i32 %b, i32 * %b1
store i32 %d, i32 * %d1
ret void
}
The current algorithm needs to be less greedy when forming pairs.</pre>
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