<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [crash] add-discriminators pass handles inlined locations incorrectly"
href="https://llvm.org/bugs/show_bug.cgi?id=30681">30681</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[crash] add-discriminators pass handles inlined locations incorrectly
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Transformation Utilities
</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>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=17430" name="attach_17430" title="t.ll">attachment 17430</a> <a href="attachment.cgi?id=17430&action=edit" title="t.ll">[details]</a></span>
t.ll
In the following example the add-discriminators pass is incorrectly setting the
scope of a non-inlined instruction (br) to the scope of its inlined predecessor
(%call.i).
This causes the LLVM Verifier to fail and assertions to fire.
To reproduce run:
clang-4.0 -cc1 -emit-obj -disable-llvm-optzns t.ll -o /dev/null -mllvm
-debug-only=add-discriminators
warning: overriding the module target triple with x86_64-apple-darwin16.1.0
t.c:1:27:1 %call.i = tail call i8* @__memset_chk(i8* null, i32 0, i64 0, i64
%0) #2, !dbg !19
t.c:1:9:1 br label %for.cond, !dbg !21, !llvm.loop !22
!dbg attachment points at wrong subprogram for function
!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !8,
isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0,
variables: !2)
i32 ()* @f
br label %for.cond, !dbg !21, !llvm.loop !22
!21 = !DILocation(line: 1, column: 9, scope: !20)
!20 = !DILexicalBlockFile(scope: !12, file: !1, discriminator: 1)
!12 = distinct !DISubprogram(name: "g", scope: !1, file: !1, line: 1, type: !8,
isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0,
variables: !2)
!dbg attachment points at wrong subprogram for function
!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !8,
isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0,
variables: !2)
i32 ()* @f
br label %for.cond, !dbg !21, !llvm.loop !22
!21 = !DILocation(line: 1, column: 9, scope: !20)
!20 = !DILexicalBlockFile(scope: !12, file: !1, discriminator: 1)
!12 = distinct !DISubprogram(name: "g", scope: !1, file: !1, line: 1, type: !8,
isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0,
variables: !2)
Assertion failed: (cast<DISubprogram>(Scope)->describes(MF->getFunction())),
function getOrCreateRegularScope, file ../lib/CodeGen/LexicalScopes.cpp, line
159.
Stack dump:
0. Program arguments:
/Volumes/Fusion/Data/llvm/_build.ninja.release/bin/clang-4.0 -cc1 -emit-obj
-disable-llvm-optzns t.ll -o /dev/null -mllvm -debug-only=add-discriminators
1. Code generation
2. Running pass 'Function Pass Manager' on module 't.ll'.
3. Running pass 'Live DEBUG_VALUE analysis' on function '@f'
Abort trap: 6</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>