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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] Lots of redundant 'adrp' instructions"
href="https://llvm.org/bugs/show_bug.cgi?id=26245">26245</a>
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<th>Summary</th>
<td>[AArch64] Lots of redundant 'adrp' instructions
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
</tr>
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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>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: AArch64
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
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<th>Reporter</th>
<td>mcrosier@codeaurora.org
</td>
</tr>
<tr>
<th>CC</th>
<td>bmakam@codeaurora.org, gberry@codeaurora.org, haicheng@codeaurora.org, junbuml@codeaurora.org, llvm-bugs@lists.llvm.org, mcrosier@codeaurora.org, mssimpso@codeaurora.org
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>I see lots of cases were we have redundant 'adrp' instructions. For example, I
just ran into something like the following:
adrp x8, 541000
str d1, [sp,#40]
ldr d1, [x8,#2392]
adrp x9, 541000 // Redundant
adrp x21, 5d3000
str d1, [sp,#32]
ldr d1, [x9,#2800]
mov x19, x0
str wzr, [x19,#16]
stp xzr, xzr, [x19]
str wzr, [sp,#20]
fmov s15, wzr
mov v4.16b, v15.16b
mov v5.16b, v15.16b
mov v6.16b, v15.16b
mov v7.16b, v15.16b
mov v16.16b, v15.16b
mov v13.16b, v15.16b
mov v14.16b, v15.16b
fmov d8, #-5.000000000000e-01
adrp x23, 5d3000 // Potentially redundant
mov w22, wzr
add x23, x23, #0xfc0
adrp x24, 5d0000
str d1, [sp,#24]
ldp d9, d12, [sp,#24]
adrp x26, 5d0000 // Redundant
add x26, x26, #0x9c8
I'll see if I can't reduce a test case shortly.</pre>
</div>
</p>
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