[LLVMbugs] [Bug 7317] New: assertion failed on lowering garbage collection instructions

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7317

           Summary: assertion failed on lowering garbage collection
                    instructions
           Product: new-bugs
           Version: 2.6
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: paende at cs.uu.nl
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=4990)
 --> (http://llvm.org/bugs/attachment.cgi?id=4990)
file that triggers the failed assertion

assertion encountered while adding garbage collection support to an llvm
backend using the build in shadow stack.

following commands trigger assertion failed on attached bc file:

---------------------------------------------------------------

+ /usr/bin/llvm-as -f -o imaginary/wheel-sieve1/build/Main_plus_prelude.bc
imaginary/wheel-sieve1/build/Main_plus_prelude.ll

+ /usr/bin/opt -std-compile-opts -dce -globalsmodref-aa -ipsccp -f -o
imaginary/wheel-sieve1/build/Main_plus_prelude_opt.bc
imaginary/wheel-sieve1/build/Main_plus_prelude.bc

+ /usr/bin/llc -mtriple=x86_64-Linux-unknown -f -o
imaginary/wheel-sieve1/build/Main_plus_prelude.s
imaginary/wheel-sieve1/build/Main_plus_prelude_opt.bc
llc: /build/buildd/llvm-2.6/include/llvm/ADT/ilist.h:197: typename
bidirectional_iterator<NodeTy, long int>::reference
llvm::ilist_iterator<NodeTy>::operator*() const [with NodeTy =
llvm::Instruction]: Assertion `Traits::getNext(NodePtr) != 0 && "Dereferencing
end()!"' failed.
0   llc             0x0000000000ec915f
1   llc             0x0000000000ec994d
2   libpthread.so.0 0x00007ff5323f5190
3   libc.so.6       0x00007ff5316fa4b5 gsignal + 53
4   libc.so.6       0x00007ff5316fdf50 abort + 384
5   libc.so.6       0x00007ff5316f3481 __assert_fail + 241
6   llc             0x0000000000e2fe5d llvm::Instruction::eraseFromParent() +
125
7   llc             0x0000000000cac0e6
8   llc             0x0000000000c24803
9   llc             0x0000000000e60f45
llvm::FPPassManager::runOnFunction(llvm::Function&) + 581
10  llc             0x0000000000e61361
llvm::FunctionPassManagerImpl::run(llvm::Function&) + 145
11  llc             0x0000000000e61571
llvm::FunctionPassManager::run(llvm::Function&) + 81
12  llc             0x00000000005399cf main + 5439
13  libc.so.6       0x00007ff5316e5abd __libc_start_main + 253
14  llc             0x0000000000537869
Stack dump:
0.    Program arguments: /usr/bin/llc -mtriple=x86_64-Linux-unknown -f -o
imaginary/wheel-sieve1/build/Main_plus_prelude.s
imaginary/wheel-sieve1/build/Main_plus_prelude_opt.bc 
1.    Running pass 'Lower Garbage Collection Instructions' on function
'@fun_plusplus'

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