[llvm-testresults] Grawp-NO-LTO-PIC i386 nightly tester results

[Evan Cheng]

I am having problem with the oggenc failure. I am no longer able to  
reproduce it on tot. However, valgrind shows this:

==47534== Invalid read of size 4
==47534==    at 0x6C2818: (anonymous  
namespace 
)::LoopStrengthReduce 
::DeleteTriviallyDeadInstructions 
(llvm::SmallPtrSet<llvm::Instruction*, 16>&)+120 (in \
/Users/echeng/LLVM/llvm/Release/bin/llc)
==47534==    by 0x6CD5ED: (anonymous  
namespace 
)::LoopStrengthReduce::runOnLoop(llvm::LoopBase<llvm::BasicBlock>*,  
llvm::LPPassManager&)+1373 (in /Users/e\
cheng/LLVM/llvm/Release/bin/llc)
==47534==    by 0x7214E4:  
llvm::LPPassManager::runOnFunction(llvm::Function&)+788 (in /Users/ 
echeng/LLVM/llvm/Release/bin/llc)
==47534==    by 0x7D99A5:  
llvm::FPPassManager::runOnFunction(llvm::Function&)+517 (in /Users/ 
echeng/LLVM/llvm/Release/bin/llc)
==47534==    by 0x7D9FC3:  
llvm::FunctionPassManagerImpl::run(llvm::Function&)+131 (in /Users/ 
echeng/LLVM/llvm/Release/bin/llc)
==47534==    by 0x7DA145:  
llvm::FunctionPassManager::run(llvm::Function&)+85 (in /Users/echeng/ 
LLVM/llvm/Release/bin/llc)
==47534==    by 0x3563: main+3299 (in /Users/echeng/LLVM/llvm/Release/ 
bin/llc)
==47534==  Address 0x25e5930 is 0 bytes inside a block of size 52 free'd
==47534==    at 0xB03847: operator delete(void*)+103 (in /usr/local/ 
lib/valgrind/x86-darwin/vgpreload_memcheck.so)
==47534==    by 0x6BF8B4: OptimizeNoopCopyExpression(llvm::CastInst*,  
llvm::TargetLowering const&)+4628 (in /Users/echeng/LLVM/llvm/Release/ 
bin/llc)
==47534==    by 0x6C01E0: (anonymous  
namespace)::CodeGenPrepare::OptimizeBlock(llvm::BasicBlock&)+960 (in / 
Users/echeng/LLVM/llvm/Release/bin/llc)
==47534==    by 0x6C0B88: (anonymous  
namespace)::CodeGenPrepare::runOnFunction(llvm::Function&)+104 (in / 
Users/echeng/LLVM/llvm/Release/bin/llc)
==47534==    by 0x7D99A5:  
llvm::FPPassManager::runOnFunction(llvm::Function&)+517 (in /Users/ 
echeng/LLVM/llvm/Release/bin/llc)
==47534==    by 0x7D9FC3:  
llvm::FunctionPassManagerImpl::run(llvm::Function&)+131 (in /Users/ 
echeng/LLVM/llvm/Release/bin/llc)
==47534==    by 0x7DA145:  
llvm::FunctionPassManager::run(llvm::Function&)+85 (in /Users/echeng/ 
LLVM/llvm/Release/bin/llc)
==47534==    by 0x3563: main+3299 (in /Users/echeng/LLVM/llvm/Release/ 
bin/llc)


This is not making a lot of sense to me. It's saying  
LoopStrengthReduce::DeleteTriviallyDeadInstructions() is reading  
memory that's already freed by OptimizeNoopCopyExpression (part of  
codegenprepare). But codegenprepare is run after LSR?!

I've also tried running verifier before and after lsr. But everything  
looks just fine.

Can anyone reproduce this? Try make ENABLE_OPTIMIZED=1 DISABLE_LTO=1  
TARGET_FLAGS= TARGET_LLCFLAGS="-relocation-model=pic -disable-fp-elim"

Evan

On Jun 15, 2008, at 11:57 AM, Evan Cheng wrote:

> This looks like a memory bug in lsr. I'm looking into it.
>
> Evan
>
> On Jun 15, 2008, at 9:16 AM, Apache wrote:
>
>> http://llvm.org/nightlytest/test.php?machine=285&night=6413
>> Name: grawp.apple.com
>> Nickname: Grawp-NO-LTO-PIC
>> Buildstatus: OK
>>
>> New Test Passes:
>> None
>>
>> New Test Failures:
>> Applications/oggenc/oggenc [LLC compile, ]
>>
>>
>> Added Tests:
>> test/BugPoint/misopt-basictest.ll for PR2453
>> test/CodeGen/X86/2008-06-13-NotVolatileLoadStore.ll
>> test/CodeGen/X86/2008-06-13-SpillerCommuting.ll
>> test/CodeGen/X86/2008-06-13-VolatileLoadStore.ll
>> test/FrontendC++/2006-11-30-NoCompileUnit.cpp for PR2454
>> test/FrontendC/2003-08-21-WideString.c for PR2425
>> test/FrontendC/2004-02-13-IllegalVararg.c for PR2425
>> test/FrontendC/2006-09-18-fwrite-cast-crash.c for PR910,2425
>> test/FrontendC/2007-09-05-ConstCtor.c for PR1641,2425
>> test/FrontendC/2007-09-28-PackedUnionMember.c for PR2425
>> test/Transforms/InstCombine/2008-06-13-InfiniteLoopStore.ll
>> test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll
>> test/Transforms/LoopStrengthReduce/change-compare-stride- 
>> trickiness.ll
>>
>>
>> Removed Tests:
>> test/BugPoint/misopt-basictest.ll
>> test/FrontendC++/2006-11-30-NoCompileUnit.cpp
>> test/FrontendC/2003-08-21-WideString.c
>> test/FrontendC/2004-02-13-IllegalVararg.c
>> test/FrontendC/2006-09-18-fwrite-cast-crash.c for PR910
>> test/FrontendC/2007-09-05-ConstCtor.c for PR1641
>> test/FrontendC/2007-09-28-PackedUnionMember.c
>>
>>
>> Significant changes in test results:
>> LLC:
>> singlesource/Benchmarks/Misc/flops: 8.87% (13.75 => 12.53)
>> singlesource/Benchmarks/Misc/flops-5: 36.50% (6.11 => 3.88)
>> singlesource/Benchmarks/Misc/flops-8: 20.29% (4.83 => 3.85)
>>
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>
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