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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - spilling general registers through xmm registers"
href="https://bugs.llvm.org/show_bug.cgi?id=47874">47874</a>
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<th>Summary</th>
<td>spilling general registers through xmm registers
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<th>Product</th>
<td>libraries
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<th>Version</th>
<td>11.0
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<th>Hardware</th>
<td>PC
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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>normal
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: X86
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>jeffr@radgametools.com
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<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, pengfei.wang@intel.com, spatel+llvm@rotateright.com
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<pre>We just updated to clang 11 (from 9), and I'm seeing a lot of this kind of
codegen, when spilling registers to the stack:
66 0f 6e c1 movd %ecx, %xmm0
66 0f 7f 85 60 fe ff ff movdqa %xmm0, -416(%rbp)
66 0f 6e c6 movd %esi, %xmm0
66 0f 7f 85 70 fe ff ff movdqa %xmm0, -400(%rbp)
What's going on here? Why aren't we just copying ecr and esi directly to those
splill locations?</pre>
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