<html>
<head>
<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Wrong debug info for unrolled loop induction variable"
href="https://bugs.llvm.org/show_bug.cgi?id=35112">35112</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Wrong debug info for unrolled loop induction variable
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>DebugInfo
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>aprantl@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>void f() {
for (int i = 1; i <=32; i <<=2 )
bar(i>>1);
}
clang -O3 -g -S -emit-llvm -o - /tmp/shiftloop.c
entry:
tail call void @llvm.dbg.value(metadata i32 1, metadata !17, metadata
!DIExpression()), !dbg !20
tail call void @llvm.dbg.value(metadata i32 1, metadata !17, metadata
!DIExpression()), !dbg !20
tail call void @llvm.dbg.value(metadata i32 1, metadata !17, metadata
!DIExpression()), !dbg !20
%call = tail call i32 (i32, ...) bitcast (i32 (...)* @bar to i32 (i32,
...)*)(i32 0) #3, !dbg !21
tail call void @llvm.dbg.value(metadata i32 4, metadata !17, metadata
!DIExpression()), !dbg !20
tail call void @llvm.dbg.value(metadata i32 4, metadata !17, metadata
!DIExpression()), !dbg !20
tail call void @llvm.dbg.value(metadata i32 1, metadata !17, metadata
!DIExpression()), !dbg !20
%call.1 = tail call i32 (i32, ...) bitcast (i32 (...)* @bar to i32 (i32,
...)*)(i32 2) #3, !dbg !21
tail call void @llvm.dbg.value(metadata i32 4, metadata !17, metadata
!DIExpression()), !dbg !20
tail call void @llvm.dbg.value(metadata i32 4, metadata !17, metadata
!DIExpression()), !dbg !20
tail call void @llvm.dbg.value(metadata i32 1, metadata !17, metadata
!DIExpression()), !dbg !20
%call.2 = tail call i32 (i32, ...) bitcast (i32 (...)* @bar to i32 (i32,
...)*)(i32 8) #3, !dbg !21
tail call void @llvm.dbg.value(metadata i32 4, metadata !17, metadata
!DIExpression()), !dbg !20
tail call void @llvm.dbg.value(metadata i32 4, metadata !17, metadata
!DIExpression()), !dbg !20
ret void, !dbg !23
}
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang
version 6.0.0 (trunk 316686) (llvm/trunk 316682)", isOptimized: true,
runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)</pre>
</div>
</p>
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