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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [llvm-mca] Add support for nested and overlapping region markers"
href="https://bugs.llvm.org/show_bug.cgi?id=41523">41523</a>
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<th>Summary</th>
<td>[llvm-mca] Add support for nested and overlapping region markers
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<th>Product</th>
<td>tools
</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
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<th>Status</th>
<td>NEW
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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>llvm-mca
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>llvm-dev@redking.me.uk
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<th>CC</th>
<td>andrea.dibiagio@gmail.com, llvm-bugs@lists.llvm.org, matthew.davis@sony.com
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<pre>We sometimes want to analyze codegen in multiple regions, it'd be useful if we
could nest and overlap region markers to support this:
testloop:
# LLVM-MCA-BEGIN outer
leal 42(%rdi), %eax
# LLVM-MCA-BEGIN inner
imull %esi, %eax
# LLVM-MCA-END inner
leal 42(%rdi), %eax
# LLVM-MCA-END outer
imull %esi, %eax
testloop:
# LLVM-MCA-BEGIN upper
leal 42(%rdi), %eax
# LLVM-MCA-BEGIN lower
imull %esi, %eax
# LLVM-MCA-END upper
leal 42(%rdi), %eax
# LLVM-MCA-END lower
imull %esi, %eax</pre>
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