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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [DebugInfo] Overlapping fragment crash at -g -O3 -mllvm -enable-partial-inlining"
href="https://bugs.llvm.org/show_bug.cgi?id=48311">48311</a>
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<th>Summary</th>
<td>[DebugInfo] Overlapping fragment crash at -g -O3 -mllvm -enable-partial-inlining
</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>
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<th>OS</th>
<td>Linux
</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>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sourav0311@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>aprantl@apple.com, jdevlieghere@apple.com, jeremy.morse.llvm@gmail.com, keith.walker@arm.com, llvm-bugs@lists.llvm.org, paul_robinson@playstation.sony.com, vsk@apple.com
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<pre>$ clang -g -O3 -mllvm -enable-partial-inlining test.c
~~~~^~~~~~~~~~~
llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp:638: void
llvm::DwarfExpression::addFragmentOffset(const llvm::DIExpression*): Assertion
`FragmentOffset >= OffsetInBits && "overlapping or duplicate fragments"'
failed.
PLEASE submit a bug report to <a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash
backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: /home/sourabh/mirror-1. <eof> parser at end of
file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'test.c'.
4. Running pass 'X86 Assembly Printer' on function '@k.1.if.then'
...
Reduced test case:
int i();
int m();
int l();
int n(int, int*);
struct a {
struct {
long b;
int volatile c;
} d;
};
long e;
int j;
int f() {
volatile int g;
do {
if (g)
return 0;
struct a h;
h.d.c = e = i();
} while (1);
}
void k() {
if (l()) {
int c = f();
while (0 == c) {
m();
f() <= n(j, &c);
}
}
}
void p() { k(); }
For simplifying reproducibity, can also be reproduced as:
$ clang -g -O3 test.c -S -emit-llvm
$ opt -partial-inliner test.ll -S | llc >/dev/null
--CRASH--</pre>
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