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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - GlobalISel does not detect hasOpaqueSPAdjustment from inline asm"
href="https://bugs.llvm.org/show_bug.cgi?id=46878">46878</a>
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<th>Summary</th>
<td>GlobalISel does not detect hasOpaqueSPAdjustment from inline asm
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<th>Product</th>
<td>libraries
</td>
</tr>
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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>Linux
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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>GlobalISel
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>Matthew.Arsenault@amd.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, quentin.colombet@gmail.com
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<p>
<div>
<pre>SelectionDAG detects inline asm with the stack pointer in the clobbers list,
and sets a field in the MachineFrameInfo. This is done in FunctionLoweringInfo,
and there's no equivalent check in GlobalISel
define void @opaque_sp() {
call void asm sideeffect "mov $0, #1", "~{sp}"()
ret void
}
llc -global-isel=0 -mtriple=aarch64-- -o - sp.ll -stop-after=finalize-isel |
grep hasOpaqueSPAdjustment
hasOpaqueSPAdjustment: true
llc -global-isel=1 -mtriple=aarch64-- -o - sp.ll -stop-after=finalize-isel |
grep hasOpaqueSPAdjustment
hasOpaqueSPAdjustment: false</pre>
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