[LLVMbugs] [Bug 4317] New: llc: Assertion `i != PredBlocks.size() && " No reachable preds?"' failed.

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=4317

           Summary: llc: Assertion `i != PredBlocks.size() && "No reachable
                    preds?"' failed.
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: edwintorok at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=3054)
 --> (http://llvm.org/bugs/attachment.cgi?id=3054)
bugpoint-reduced-simplified.bc

While reducing a miscompilation with bugpoint, it has found a crash in llc too:
llc: /home/edwin/llvm-svn/llvm/include/llvm/Analysis/Dominators.h:273: void
llvm::DominatorTreeBase<NodeT>::Split(llvm::DominatorTreeBase<typename
GraphT::NodeType>&, typename GraphT::NodeType*) [with N = llvm::BasicBlock*,
GraphT = llvm::GraphTraits<llvm::BasicBlock*>, NodeT = llvm::BasicBlock]:
Assertion `i != PredBlocks.size() && "No reachable preds?"' failed.
0   llc             0x0000000000d6923f
1   llc             0x0000000000d69639
2   libpthread.so.0 0x00007f8ca26a97b0
3   libc.so.6       0x00007f8ca19c9065 gsignal + 53
4   libc.so.6       0x00007f8ca19cc153 abort + 387
5   libc.so.6       0x00007f8ca19c2159 __assert_fail + 233
6   llc             0x0000000000bbe663 void
llvm::DominatorTreeBase<llvm::BasicBlock>::Split<llvm::BasicBlock*,
llvm::GraphTraits<llvm::BasicBlock*>
>(llvm::DominatorTreeBase<llvm::GraphTraits<llvm::BasicBlock*>::NodeType>&,
llvm::GraphTraits<llvm::BasicBlock*>::NodeType*) +3203
7   llc             0x0000000000bbc4ff
8   llc             0x0000000000bbc986
9   llc             0x0000000000d02059
llvm::FPPassManager::runOnFunction(llvm::Function&) + 489
10  llc             0x0000000000d02316
llvm::FunctionPassManagerImpl::run(llvm::Function&) + 166
11  llc             0x0000000000d0255b
llvm::FunctionPassManager::run(llvm::Function&) + 75
12  llc             0x0000000000518189 main + 4633
13  libc.so.6       0x00007f8ca19b55a6 __libc_start_main + 230
14  llc             0x00000000005163b9
Stack dump:
0.      Program arguments: llc bugpoint-reduced-simplified.bc
1.      Running pass 'Exception handling preparation' on function
'@_ZN4llvm16IntrinsicEmitter28EmitIntrinsicToGCCBuiltinMapERKSt6vectorINS_16CodeGenIntrinsicESaIS2_EERSo'
Aborted


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