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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [X86] EltsFromConsecutiveLoads - incorrect folding of non-zero offset base loads"
href="https://bugs.llvm.org/show_bug.cgi?id=43227">43227</a>
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<th>Summary</th>
<td>[X86] EltsFromConsecutiveLoads - incorrect folding of non-zero offset base loads
</td>
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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>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: X86
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>llvm-dev@redking.me.uk
</td>
</tr>
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<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, spatel+llvm@rotateright.com
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<pre>As reported on D64551, rL366681 doesn't correctly handle cases where the
deerived byte offset of the base load is non-zero.
define void @foo(i32* %explicit_0, <8 x i32>* %explicit_1) {
%1 = getelementptr i32, i32* %explicit_0, i64 63
%2 = bitcast i32* %1 to <3 x i32>*
%3 = load <3 x i32>, <3 x i32>* %2, align 1
%4 = shufflevector <3 x i32> %3, <3 x i32> undef, <2 x i32> <i32 1, i32 2>
%5 = shufflevector <2 x i32> %4, <2 x i32> undef, <8 x i32> <i32 0, i32 1,
i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
%6 = shufflevector <8 x i32> <i32 0, i32 0, i32 0, i32 0, i32 undef, i32 0,
i32 undef, i32 0>, <8 x i32> %5, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 8,
i32 5, i32 9, i32 7>
%7 = getelementptr inbounds <8 x i32>, <8 x i32>* %explicit_1, i64 21
store <8 x i32> %6, <8 x i32>* %7, align 32
ret void
}</pre>
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