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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - InstCombine: stacksaverestore.ll looks different with debug info present"
href="https://bugs.llvm.org/show_bug.cgi?id=37713">37713</a>
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<th>Summary</th>
<td>InstCombine: stacksaverestore.ll looks different with debug info present
</td>
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<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>vsk@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
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<pre>Running `opt -O1` on stacksaverestore.ll produces different output with/without
debug info present. To reproduce the issue, do:
# Baseline
$ $OPT -O1 test/Transforms/InstCombine/stacksaverestore.ll -S -o -
# With debug info
$ $OPT -O1 test/Transforms/InstCombine/stacksaverestore.ll -o - -debugify-each
-debugify-quiet | $OPT -strip -S
Comparing: -O1 test/Transforms/InstCombine/stacksaverestore.ll
Baseline: /var/folders/j8/t4w0bp8j6x1g6fpghkcb4sjm0000gp/T/tmp.P2vczKKB
With DI : /var/folders/j8/t4w0bp8j6x1g6fpghkcb4sjm0000gp/T/tmp.pcByPNQ1
12,16c12,18
< ; Function Attrs: norecurse nounwind readnone
< define noalias nonnull i32* @test1(i32) local_unnamed_addr #1 {
< %2 = zext i32 %0 to i64
< %3 = alloca i32, i64 %2, align 4
< ret i32* %3
---
<span class="quote">> ; Function Attrs: nounwind
> define noalias nonnull i32* @test1(i32) local_unnamed_addr #0 {
> %2 = tail call i8* @llvm.stacksave()
> tail call void @llvm.stackrestore(i8* %2)
> %3 = zext i32 %0 to i64
> %4 = alloca i32, i64 %3, align 4
> ret i32* %4</span >
:: Found a test case ^</pre>
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