search for: pointerbase

...I looked again into ScalarEvolution. > >> > >> To analyze a load, you would do: > >> > >> LoadInst *Load = ... > >> Value *Pointer = Load->getPointer(); > >> const SCEV *PointerSCEV = SE->getSCEV(Pointer); > >> const SCEVUnknown *PointerBase = > >> dyn_cast<SCEVUnknown>(SE->getPointerBase(PointerSCEV)); > >> > >> if (!PointerBase) > >> return 'Analysis failed' > >> > >> const Value *BaseValue = PointerBase->getValue(); > >> > >> You get the...

...ooked again into ScalarEvolution. >>>> >>>> To analyze a load, you would do: >>>> >>>> LoadInst *Load = ... Value *Pointer = Load->getPointer(); const >>>> SCEV *PointerSCEV = SE->getSCEV(Pointer); const SCEVUnknown >>>> *PointerBase = >>>> dyn_cast<SCEVUnknown>(SE->getPointerBase(PointerSCEV)); >>>> >>>> if (!PointerBase) return 'Analysis failed' >>>> >>>> const Value *BaseValue = PointerBase->getValue(); >>>> >>>> You get t...

...reate > any vector instructions. I also played a little with the vectorizer > options, but was not able to get this example vectorized. Is this > because the chain is too short? > > >>> One problem with the current implementation is that it relies on > >>> GetPointerBaseWithConstantOffset to determine if two loads or stores > >>> share the same base address. This fails with partially-unrolled loops > >>> because it cannot "undo" all of the additions to the offset induction > >>> variable in order to understand that some...

...wrote: >> Talking about this I looked again into ScalarEvolution. >> >> To analyze a load, you would do: >> >> LoadInst *Load = ... >> Value *Pointer = Load->getPointer(); >> const SCEV *PointerSCEV = SE->getSCEV(Pointer); >> const SCEVUnknown *PointerBase = >> dyn_cast<SCEVUnknown>(SE->getPointerBase(PointerSCEV)); >> >> if (!PointerBase) >> return 'Analysis failed' >> >> const Value *BaseValue = PointerBase->getValue(); >> >> You get the offset between two load addresses with...

...3 -vectorize on it, does not create any vector instructions. I also played a little with the vectorizer options, but was not able to get this example vectorized. Is this because the chain is too short? >>> One problem with the current implementation is that it relies on >>> GetPointerBaseWithConstantOffset to determine if two loads or stores >>> share the same base address. This fails with partially-unrolled loops >>> because it cannot "undo" all of the additions to the offset induction >>> variable in order to understand that some of the loads a...

...er > > chose the unrolling factor to preserve the maximum available alignment, > > but I don't think that it currently does so. > I don't know, but it sounds like a good thing to do. > > > One problem with the current implementation is that it relies on > > GetPointerBaseWithConstantOffset to determine if two loads or stores > > share the same base address. This fails with partially-unrolled loops > > because it cannot "undo" all of the additions to the offset induction > > variable in order to understand that some of the loads and stores...

...on. > >>>> > >>>> To analyze a load, you would do: > >>>> > >>>> LoadInst *Load = ... Value *Pointer = Load->getPointer(); const > >>>> SCEV *PointerSCEV = SE->getSCEV(Pointer); const SCEVUnknown > >>>> *PointerBase = > >>>> dyn_cast<SCEVUnknown>(SE->getPointerBase(PointerSCEV)); > >>>> > >>>> if (!PointerBase) return 'Analysis failed' > >>>> > >>>> const Value *BaseValue = PointerBase->getValue(); > >>>&...

...> > >>>> To analyze a load, you would do: > > >>>> > > >>>> LoadInst *Load = ... Value *Pointer = Load->getPointer(); const > > >>>> SCEV *PointerSCEV = SE->getSCEV(Pointer); const SCEVUnknown > > >>>> *PointerBase = > > >>>> dyn_cast<SCEVUnknown>(SE->getPointerBase(PointerSCEV)); > > >>>> > > >>>> if (!PointerBase) return 'Analysis failed' > > >>>> > > >>>> const Value *BaseValue = PointerBase->getVa...