[LLVMdev] opt -O3 causes Assertion `New->getType() == getType() && "replaceAllUses of value with new value of different type!"' failed

[Milind Chabbi]

Hi Hal,

I have filed http://llvm.org/bugs/show_bug.cgi?id=16780

-Milind

On Fri, Aug 2, 2013 at 9:15 AM, Hal Finkel <hfinkel at anl.gov> wrote:
> Milind,
>
> Have you filed a bug on this? If not, can you please open a bug report (http://llvm.org/bugs)?
>
>  -Hal
>
> ----- Original Message -----
>> I am hitting an LLVM assertion from the llc tool iff the bitcode file
>> is optimized at -O3 level by opt). -O1 and -O2 levels of opt do not
>> cause this assert.
>>
>>  LLVM version 3.4svn
>>   DEBUG build with assertions.
>>   Built Jul 14 2013 (15:39:08).
>>   Default target: x86_64-unknown-linux-gnu
>>   Host CPU: amdfam10
>>
>>
>> I have attached the input bc file before -O3 optimization
>> :bzip2.del.bc.tgz
>> I have attached the input bc file after -O3 optimization :
>> bzip2.del.opt.bc.tgz
>>
>>
>> Command to run on -O3 optimized file: llc -cppgen=program
>> bzip2.del.opt.bc
>>
>> Call stack:
>>
>> llc: Value.cpp:307: void
>> llvm::Value::replaceAllUsesWith(llvm::Value*): Assertion
>> `New->getType() == getType() && "replaceAllUses of value with new
>> value of different type!"' failed.
>> 0  llc             0x00000000014c716a
>> llvm::sys::PrintStackTrace(_IO_FILE*) + 38
>> 1  llc             0x00000000014c73d1
>> 2  llc             0x00000000014c7718
>> 3  libpthread.so.0 0x000000333060eb10
>> 4  libc.so.6       0x000000332fa30265 gsignal + 53
>> 5  libc.so.6       0x000000332fa31d10 abort + 272
>> 6  libc.so.6       0x000000332fa296e6 __assert_fail + 246
>> 7  llc             0x00000000014702df
>> llvm::Value::replaceAllUsesWith(llvm::Value*) + 173
>> 8  llc             0x00000000006b91e3
>> llvm::BitcodeReaderValueList::ResolveConstantForwardRefs() + 1127
>> 9  llc             0x00000000006b9d97
>> llvm::BitcodeReader::ParseConstants() + 339
>> 10 llc             0x00000000006bc634
>> llvm::BitcodeReader::ParseFunctionBody(llvm::Function*) + 594
>> 11 llc             0x00000000006c2d63
>> llvm::BitcodeReader::Materialize(llvm::GlobalValue*, std::string*) +
>> 411
>> 12 llc             0x00000000006c290d
>> llvm::BitcodeReader::MaterializeModule(llvm::Module*, std::string*) +
>> 195
>> 13 llc             0x000000000144898e
>> llvm::Module::MaterializeAll(std::string*) + 78
>> 14 llc             0x00000000014489b7
>> llvm::Module::MaterializeAllPermanently(std::string*) + 29
>> 15 llc             0x00000000006c367b
>> llvm::ParseBitcodeFile(llvm::MemoryBuffer*, llvm::LLVMContext&,
>> std::string*) + 93
>> 16 llc             0x0000000000679302
>> llvm::ParseIR(llvm::MemoryBuffer*, llvm::SMDiagnostic&,
>> llvm::LLVMContext&) + 214
>> 17 llc             0x000000000067958a llvm::ParseIRFile(std::string
>> const&, llvm::SMDiagnostic&, llvm::LLVMContext&) + 374
>> 18 llc             0x00000000006680f4
>> 19 llc             0x0000000000668fed main + 199
>> 20 libc.so.6       0x000000332fa1d994 __libc_start_main + 244
>> 21 llc             0x0000000000666319
>> Stack dump:
>> 0.    Program arguments: llc -cppgen=program bzip2.del.opt.bc
>>
>> _______________________________________________
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>>
>
> --
> Hal Finkel
> Assistant Computational Scientist
> Leadership Computing Facility
> Argonne National Laboratory
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