[LLVMdev] Error when using getAnalysis

[nitisha warkari]

Hi,

I'm trying to use the function getAnalysis. This is the code I'm using :

 void getAnalysisUsage(AnalysisUsage &AU) const {
      AU.addRequired<LoopInfo>();
      AU.setPreservesAll();
    }

 virtual bool runOnModule(Module &M) {
     LoopInfo &LI = getAnalysis<LoopInfo>();


   }



I get following error when I try to run my pass :

opt:
/net/hc295/nwarkari/llvm/llvm-2.3/include/llvm/PassAnalysisSupport.h:193:
AnalysisType& llvm::Pass::getAnalysisID(const llvm::PassInfo*) const [with
AnalysisType = llvm::LoopInfo]: Assertion `ResultPass && "getAnalysis*()
called on an analysis that was not " "'required' by pass!"' failed.
opt[0x83cfa9d]
/lib/tls/libc.so.6(abort+0xe9)[0x15d289]
/lib/tls/libc.so.6(__assert_fail+0x101)[0x154da1]
opt(_ZNK4llvm4Pass13getAnalysisIDINS_8LoopInfoEEERT_PKNS_8PassInfoE+0x54)[0x81294a0]

Could someone please help me out with this?

Thanks!
Nitisha
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