[LLVMdev] Crash/Assert on -loop-reduce

[Eli Friedman]

On Wed, Feb 8, 2012 at 10:09 AM, Ryan Taylor <ryta1203 at gmail.com> wrote:
> Unfortunately, I cannot provide the exact code, but I will attempt to look
> for the reason and post a test case.

Okay... note that bugpoint is very good at reducing testcases which crash.

-Eli

>
>
> On Tue, Feb 7, 2012 at 6:04 PM, Eli Friedman <eli.friedman at gmail.com> wrote:
>>
>> On Tue, Feb 7, 2012 at 5:52 PM, Ryan Taylor <ryta1203 at gmail.com> wrote:
>> > opt:
>> > /home/ryan/llvm/llvm_core/llvm-3.0/include/llvm/Support/Casting.h:194:
>> > typename cast_retty<Instruction, User *>::ret_type llvm::cast(llvm::User
>> > *const &): Assertion `isa<X>(Val) && "cast<Ty>() argument of
>> > incompatible
>> > type!"' failed.
>> > 0  opt             0x000000000085cfef
>> > 1  opt             0x000000000085d509
>> > 2  libpthread.so.0 0x00007fdb30054c60
>> > 3  libc.so.6       0x00007fdb2f33fd05 gsignal + 53
>> > 4  libc.so.6       0x00007fdb2f343ab6 abort + 390
>> > 5  libc.so.6       0x00007fdb2f3387c5 __assert_fail + 245
>> > 6  opt             0x000000000051a9a6
>> > 7  opt             0x000000000051979e
>> > 8  opt             0x0000000000503863
>> > 9  opt             0x000000000050102e
>> > 10 opt             0x0000000000689184
>> > llvm::LPPassManager::runOnFunction(llvm::Function&) + 836
>> > 11 opt             0x0000000000801f9f
>> > llvm::FPPassManager::runOnFunction(llvm::Function&) + 351
>> > 12 opt             0x000000000080221b
>> > llvm::FPPassManager::runOnModule(llvm::Module&) + 59
>> > 13 opt             0x000000000080236a
>> > llvm::MPPassManager::runOnModule(llvm::Module&) + 282
>> > 14 opt             0x0000000000802941
>> > llvm::PassManagerImpl::run(llvm::Module&) + 337
>> > 15 opt             0x0000000000802e4a
>> > llvm::PassManager::run(llvm::Module&)
>> > + 10
>> > 16 opt             0x00000000004919d7 main + 5511
>> > 17 libc.so.6       0x00007fdb2f32aeff __libc_start_main + 255
>> > 18 opt             0x000000000048bc95
>> > Stack dump:
>> >
>> > If I don't use the opt -loop-reduce then this code runs fine. I'm not
>> > really
>> > sure the issue.
>>
>> It's hard to say what is happening without a testcase.
>>
>> -Eli
>
>