llvm dev - Mar 2007 - [LLVMdev] strange pass behaviour

Hi

I have written a pass which creates some scheduling information. Its called
MParSchedule.
This pass works with opt. But when feeding it my experimental backend it seems
to loose
instructions and fails to work. I am loading this stuff as .so libraries under
linux and i am
using the amd64 version with a self compiled llvm-gcc.

With this call it works:
opt --load=/llvm/Debug/lib/MParSchedule.so -MParSchedule -f -o opt.o a.out.bc

With the following it won't:
llc --load=/llvm/Debug/lib/MParSchedule.so -load=/llvm/Debug/lib/libMyBackend.so
-f -march=MyBackend a.out.bc

I am quite puzzled and would be happy if anyone would have a suggestion what
goes wrong.
Which means the linefor the first instruction of the second block processed is
missing (tmp1)
for my unoptimized example bytecode attached.

Am i not allowed to load a pass dynamically for llc? I doubt that i have memory
corruption
since i am using the stl for all lists and stuff.

Thanks
ST

----
relevant code snipped from MParSchedule.cpp
namespace llvm {
bool MParSchedule::runOnFunction(Function &F) {
        for (Function::iterator i = F.begin(), e = F.end(); i != e; ++i) {
                BasicBlock &B=*i;
                runOnBasicBlock(B);
        }
        return false;
}

bool MParSchedule::runOnBasicBlock(BasicBlock &B) {
        // fill the Instruction list and the available values list
        InstructionList.clear();
        //ValueList.clear(); //FIXME: check if not clearing the Value List might
cause problems?
        list<Schedule*> *ScheduleList=new list<Schedule*>::list();
        for(BasicBlock::iterator j=B.begin(),bbe=B.end();j!=bbe;++j) {
                InstructionList.push_back(j);
              cerr<<"Copying:
"<<j->getName()<<"
"<<InstructionList.size()<<endl;
......
......
}
RegisterPass<MParSchedule>
X("MParSchedule","MParSchedule");

------------------------
Makefile MParschedule
LEVEL = ../../../..

LIBRARYNAME= MParSchedule

BUILD_ARCHIVE=1
SHARED_LIBRARY = 1
LOADABLE_MODULE= 1

include $(LEVEL)/Makefile.common
-------------------------
Makefile MyBackend
LEVEL = ../../..
LIBRARYNAME = MyBackend
PARALLEL_DIRS = MParSchedule
USEDLIBS = MParSchedule.o
LLVMLIBS = LLVMCore.a LLVMSupport.a LLVMSystem.a MParSchedule.a
#LIBS += -lMParSchedule
#LINK_COMPONENTS= MParSchedule

SHARED_LIBRARY = 1

include $(LEVEL)/Makefile.common
-------------- next part --------------
A non-text attachment was scrubbed...
Name: a.out.bc
Type: application/octet-stream
Size: 670 bytes
Desc: not available
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20070323/9ffe5ebb/attachment.obj>

Hi

In an chapter of "How to foot yourself in the shot" i requested the 
pass-manager to do some passes before my pass and forgot that (via PM.add()).

So now the internal structures just look like the bytecode feeded to them.

ST