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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Mips64: Missing sign extension when operand for truncate instruction is in another basic block."
href="https://llvm.org/bugs/show_bug.cgi?id=27421">27421</a>
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<th>Summary</th>
<td>Mips64: Missing sign extension when operand for truncate instruction is in another basic block.
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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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>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Backend: MIPS
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>Vasileios.Kalintiris@imgtec.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Test case for this problem :
define i64 @foo1(i64 zeroext %var) {
entry:
%shr = lshr i64 %var, 32
%cmp = icmp eq i64 %shr, 0
br i1 %cmp, label %if.end6, label %if.then
if.then: ; preds = %entry
%conv = trunc i64 %shr to i32
%cmp2 = icmp slt i32 %conv, 0
br i1 %cmp2, label %if.then4, label %if.else
if.then4: ; preds = %if.then
%add = add i64 %var, 16
br label %if.end6
if.else: ; preds = %if.then
%add5 = add i64 %var, 32
br label %if.end6
if.end6: ; preds = %entry, %if.then4,
%if.else
%var.addr.0 = phi i64 [ %add, %if.then4 ], [ %add5, %if.else ], [ %var,
%entry ]
ret i64 %var.addr.0
}
Command line:
llc < %s -march=mips64el -mcpu=mips64r2 -o test.S</pre>
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