| Issue |
182046
|
| Summary |
[SimplifyCFG] LLVM Error due to 'Wrong number of operands'
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
KirillVNaumov
|
Here is a link to the failing test: https://godbolt.org/z/acK6eTsn1.
When it's run with the `-passes=verify`, the test compiles as normal, however when `-passes=simplifycfg` is applied to it, the test crashes with
```
Wrong number of operands
!0 = !{!"branch_weights", i32 1, i32 0, i32 0, i32 0, i32 2}
LLVM ERROR: Broken module found, compilation aborted!
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-trunk/bin/opt -o /app/output.s -S -passes=simplifycfg <source>
1. Running pass "verify" on module "<source>"
#0 0x0000000005389b28 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/opt+0x5389b28)
#1 0x0000000005386d14 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#2 0x0000751047242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x00007510472969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x0000751047242476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x00007510472287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x00000000008326d3 llvm::json::operator==(llvm::json::Value const&, llvm::json::Value const&) (.cold) JSON.cpp:0:0
#7 0x00000000052bb528 (/opt/compiler-explorer/clang-trunk/bin/opt+0x52bb528)
#8 0x0000000005137270 llvm::VerifierPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x5137270)
#9 0x00000000009759de llvm::detail::PassModel<llvm::Module, llvm::VerifierPass, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x9759de)
#10 0x00000000050fd9d7 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-trunk/bin/opt+0x50fd9d7)
#11 0x000000000097f96a llvm::runPassPipeline(llvm::StringRef, llvm::Module&, llvm::TargetMachine*, llvm::TargetLibraryInfoImpl*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::StringRef, llvm::ArrayRef<llvm::PassPlugin>, llvm::ArrayRef<std::function<void (llvm::PassBuilder&)>>, llvm::opt_tool::OutputKind, llvm::opt_tool::VerifierKind, bool, bool, bool, bool, bool, bool, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/opt+0x97f96a)
#12 0x0000000000972eff optMain (/opt/compiler-explorer/clang-trunk/bin/opt+0x972eff)
#13 0x0000751047229d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#14 0x0000751047229e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#15 0x000000000096b6e5 _start (/opt/compiler-explorer/clang-trunk/bin/opt+0x96b6e5)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
Git bisect identified https://github.com/llvm/llvm-project/commit/5b2f9b53bdb348393bba221c5f69bfac179092c8 as the guilty commit after which the pass fails.
CC @kper
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