assigned to @lattner

Ohh, it doesn't cycle:

$ ./opt -scalarrepl bugpoint-reduced-simplified.bc -time-passes -disable-output
===-------------------------------------------------------------------------===
... Pass execution timing report ...
===-------------------------------------------------------------------------===
Total Execution Time: 2565.1610 seconds (2567.9171 wall clock)

---User Time--- --System Time-- --User+System-- ---Wall Time--- ---
Name ---
2564.8470 ( 99.9%) 0.2039 ( 99.5%) 2565.0510 ( 99.9%) 2567.8074 ( 99.9%)
Scalar Replacement of Aggregates
0.1089 ( 0.0%) 0.0000 ( 0.0%) 0.1089 ( 0.0%) 0.1095 ( 0.0%) Module
Verifier
0.0000 ( 0.0%) 0.0009 ( 0.4%) 0.0009 ( 0.0%) 0.0000 ( 0.0%)
Dominator Tree Construction
0.0000 ( 0.0%) 0.0000 ( 0.0%) 0.0000 ( 0.0%) 0.0000 ( 0.0%) ET
Forest Construction
0.0000 ( 0.0%) 0.0000 ( 0.0%) 0.0000 ( 0.0%) 0.0000 ( 0.0%)
Dominance Frontier Construction
0.0000 ( 0.0%) 0.0000 ( 0.0%) 0.0000 ( 0.0%) 0.0000 ( 0.0%) Target
Data Layout
2564.9560 (100.0%) 0.2049 (100.0%) 2565.1610 (100.0%) 2567.9171 (100.0%)
TOTAL

Scalarrepl ends with tons of GEPs and stores, turning 1K bytecode to 3M monster.

Geeze, why so sad about 2500 seconds? :)

I'll take a look, thx

Fixed. Patch here:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070521/050016.html

Testcase here: Transforms/ScalarRepl/2007-05-24-LargeAggregate.ll

Thanks!

-Chris

Cheater!

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

Troubling source file

False alarm. Had only recompiled LLVM, not the frontend.