[LLVMbugs] [Bug 5235] New: llc: Assertion `HasInsideLoopSuccs && " Loop block has no in-loop successors!"' failed.

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=5235

           Summary: llc: Assertion `HasInsideLoopSuccs && "Loop block has no
                    in-loop successors!"' failed.
           Product: new-bugs
           Version: trunk
          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


Attempting to codegen an -O0 compiled file with llc fails:
/home/edwin/llvm-git/obj/Release/bin/llc bugpoint-reduced-simplified.bc
llc: /home/edwin/llvm-git/llvm/include/llvm/Analysis/LoopInfo.h:426: void
llvm::LoopBase<N, M>::verifyLoop() const [with BlockT = llvm::BasicBlock, LoopT
= llvm::Loop]: Assertion `HasInsideLoopSuccs && "Loop block has no in-loop
successors!"' failed.
0   llc             0x0000000000f3b5ff
1   llc             0x0000000000f3d2c9
2   libpthread.so.0 0x0000003411e0e720
3   libc.so.6       0x0000003411231d25 gsignal + 53
4   libc.so.6       0x0000003411234de1 abort + 385
5   libc.so.6       0x000000341122af99 __assert_fail + 233
6   llc             0x0000000000df871c llvm::LoopBase<llvm::BasicBlock,
llvm::Loop>::verifyLoop() const + 2700
7   llc             0x0000000000dfb54b
llvm::LPPassManager::runOnFunction(llvm::Function&) + 1659
8   llc             0x0000000000ec95a1
llvm::FPPassManager::runOnFunction(llvm::Function&) + 561
9   llc             0x0000000000ec97b6
llvm::FunctionPassManagerImpl::run(llvm::Function&) + 166
10  llc             0x0000000000ec9a25
llvm::FunctionPassManager::run(llvm::Function&) + 85
11  llc             0x000000000054b614 main + 6452
12  libc.so.6       0x000000341121e5c6 __libc_start_main + 230
13  llc             0x0000000000549179
Stack dump:
0.      Program arguments: /home/edwin/llvm-git/obj/Release/bin/llc
bugpoint-reduced-simplified.bc
1.      Running pass 'Loop Pass Manager' on function '@is_extract_cab'
Aborted

If I run -simplifycfg and then run llc it works.


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