[LLVMbugs] [Bug 1446] scalarrepl decimates giant struct

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1446

bram.adams at ugent.be changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |



------- Additional Comments From bram.adams at ugent.be  2007-05-30 16:40 -------
It looks like the fix only works on OSX (PPC), as on Linux X86 the frontend is now stuck inside the for-
loop on lines 176-->391 of PromoteMemoryToRegister.cpp when in the control flow of -scalarrepl:

#4  0x08764f72 in (anonymous namespace)::PromoteMem2Reg::run (this=0xbff9bfa0)
    at /home/bram/workspace/svn/aspicere2/trunk/llvm/lib/Transforms/Utils/
PromoteMemoryToRegister.cpp:271
#5  0x08767021 in llvm::PromoteMemToReg (Allocas=@0xbff9c120, ET=@0x8b14c10, 
DF=@0x8b14d98, AST=0x0)
    at /home/bram/workspace/svn/aspicere2/trunk/llvm/lib/Transforms/Utils/
PromoteMemoryToRegister.cpp:812
#6  0x08744713 in (anonymous namespace)::SROA::performPromotion (this=0x8b14f38, 
F=@0x8bc8468)
    at /home/bram/workspace/svn/aspicere2/trunk/llvm/lib/Transforms/Scalar/
ScalarReplAggregates.cpp:130
#7  0x087445ba in (anonymous namespace)::SROA::runOnFunction (this=0x8b14f38, F=@0x8bc8468)
    at /home/bram/workspace/svn/aspicere2/trunk/llvm/lib/Transforms/Scalar/
ScalarReplAggregates.cpp:101
#8  0x08826499 in llvm::FPPassManager::runOnFunction (this=0x8b15d00, F=@0x8bc8468)
    at /home/bram/workspace/svn/aspicere2/trunk/llvm/lib/VMCore/PassManager.cpp:1145
#9  0x08826237 in llvm::FunctionPassManagerImpl::run (this=0x8b14e78, F=@0x8bc8468)
    at /home/bram/workspace/svn/aspicere2/trunk/llvm/lib/VMCore/PassManager.cpp:1103
#10 0x0882611f in llvm::FunctionPassManager::run (this=0x8b156e8, F=@0x8bc8468)
    at /home/bram/workspace/svn/aspicere2/trunk/llvm/lib/VMCore/PassManager.cpp:1048

Steps to reproduce (new attached file): 

llvm-gcc -emit-llvm  -Wall -fno-strict-aliasing -Wimplicit -Wstrict-prototypes -pipe -DUSE_OPENAL=1 
-DUSE_CURL=1 -DUSE_CURL_DLOPEN=1 -DUSE_SDL_VIDEO=1 -DUSE_SDL_SOUND=1 -I/usr/include/
SDL -D_REENTRANT -m32 -DUSE_LOCAL_HEADERS=1 -DSVN_VERSION=\"1.33_SVN6303:6304\" -
DNDEBUG -O3 -march=i586 -fomit-frame-pointer -ffast-math -funroll-loops -falign-loops=2 -
falign-jumps=2 -falign-functions=2 -fstrength-reduce  -o file.o -c file.c



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