https://llvm.org/bugs/show_bug.cgi?id=26669
Bug ID: 26669
Summary: SjLjEHPrepare::doInitialization() is broken
Product: new-bugs
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: mehdi.am...@apple.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Try with any code that contains an invoke to run globaldce and sjljehprepare,
LLVM is crashing:
opt -globaldce -sjljehprepare test/CodeGen/X86/funclet-layout.ll
0 opt 0x00000001053c1e9b
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 43
1 opt 0x00000001053c10c6 llvm::sys::RunSignalHandlers() +
70
2 opt 0x00000001053c255f SignalHandler(int) + 383
3 libsystem_platform.dylib 0x00007fff8595c52a _sigtramp + 26
4 libsystem_platform.dylib 0x00007ffa39500190 _sigtramp + 3015326848
5 opt 0x0000000104f79373
llvm::FPPassManager::runOnFunction(llvm::Function&) + 547
6 opt 0x0000000104f795cb
llvm::FPPassManager::runOnModule(llvm::Module&) + 43
7 opt 0x0000000104f79a3e
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 782
8 opt 0x000000010469a8c2 main + 9362
9 libdyld.dylib 0x00007fff926cf5ad start + 1
Stack dump:
0. Program arguments: ./bin/opt -globaldce -sjljehprepare
../llvm/test//CodeGen/X86/funclet-layout.ll
1. Running pass 'Function Pass Manager' on module
'../llvm/test//CodeGen/X86/funclet-layout.ll'.
2. Running pass 'SJLJ Exception Handling preparation' on function '@test1'
Segmentation fault: 11
The reason is that it creates declarations during initialization and expects
these to survive till it runOnFunction is called.
This is obviously a broken assumption.
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