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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 - [llvm-mca] crash when simulating AArch64 'falkor'"
href="https://bugs.llvm.org/show_bug.cgi?id=37293">37293</a>
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<th>Summary</th>
<td>[llvm-mca] crash when simulating AArch64 'falkor'
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
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<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>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>spatel+llvm@rotateright.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<div>
<pre>I was hoping to compare llvm-mca's analysis with the comments in bug 37629, but
something bad happens when I specify 'falkor' as the CPU. But there's no
problem with 'kryo' apparently, so I suspect that llvm-mca itself needs to do
something to fix/avoid this problem in the CPU model? This is built from trunk
r331140.
$ cat 37629.s
fmov d1, #0.50000000
fmul d0, d0, d1
fneg d1, d0
stp d0, d1, [x0]
$ ./llvm-mca 37629.s -mtriple=aarch64 -mcpu=falkor
Assertion failed: (isReady()), function selectNextInSequence, file
llvm/tools/llvm-mca/Scheduler.cpp, line 28.
Stack dump:
0. Program arguments: ./llvm-mca 37629.s -mtriple=aarch64 -mcpu=falkor
0 llvm-mca 0x00000001022ed228
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 40
1 llvm-mca 0x00000001022ed8a6 SignalHandler(int) + 422
2 libsystem_platform.dylib 0x00007fff7bd3cf5a _sigtramp + 26
3 libsystem_platform.dylib 0x00007ffeedcf61b0 _sigtramp + 1912312432
4 libsystem_c.dylib 0x00007fff7bada1ae abort + 127
5 libsystem_c.dylib 0x00007fff7baa21ac basename_r + 0
6 llvm-mca 0x0000000101f1ee80
mca::ResourceManager::selectPipe(unsigned long long) + 448
7 llvm-mca 0x0000000101f203c7
mca::ResourceManager::issueInstruction(mca::InstrDesc const&,
llvm::SmallVectorImpl<std::__1::pair<std::__1::pair<unsigned long long,
unsigned long long>, double> >&) + 215
8 llvm-mca 0x0000000101f22327
mca::Scheduler::issueInstructionImpl(unsigned int, mca::Instruction&,
llvm::SmallVectorImpl<std::__1::pair<std::__1::pair<unsigned long long,
unsigned long long>, double> >&) + 39
9 llvm-mca 0x0000000101f217a2
mca::Scheduler::issueInstruction(unsigned int, mca::Instruction&) + 210
10 llvm-mca 0x0000000101f0e0fa
mca::DispatchUnit::dispatch(unsigned int, mca::Instruction*,
llvm::MCSubtargetInfo const&) + 506
11 llvm-mca 0x0000000101f0abe1 mca::Backend::runCycle(unsigned
int) + 545</pre>
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</p>
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