Hello,
I've encountered an assertion failure / crash on clang master
(5de09ef02e24) as well as the older version 11. Happens for "-target
bpf", not otherwise.
I've reported it to clang but there's been no response so far. Alexei, I
believe you've invited me to raise the issue here.
clang bugzilla: https://bugs.llvm.org/show_bug.cgi?id=48578
The repro program and instructions are in the bug report above.
The assertion failure reads:
clang:
/home/andrei/src/llvm-project/llvm/lib/CodeGen/LiveVariables.cpp:130:
void llvm::LiveVariables::HandleVirtRegUse(llvm::Register,
llvm::MachineBasicBlock*, llvm::MachineInstr&): Assertion
`MRI->getVRegDef(Reg) && "Register use before def!"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the
crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: bin/clang -O2 -target bpf -c -o probe.bpf.o
/home/andrei/Downloads/probe.bpf.preprocessed.c
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module
'/home/andrei/Downloads/probe.bpf.preprocessed.c'.
4. Running pass 'Live Variable Analysis' on function '@probe'
Thanks!
