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..., I am working on a project that requires LLVM DeadStoreElimination However, when I look through the code in Transforms/Scalar/DeadStoreElimination.cpp, I see the following: // Ignore any store where we can't find a local dependence. // FIXME: cross-block DSE would be fun. :) if (!InstDep.isDef() && !InstDep.isClobber()) continue; I have two questions on this code:I have two questions on this code: 1. What is a clobber? 2. Does the local dependence mean that the dependence should reside in the same basic bloWhat does the comment (FIXME: cross-block DSE would be fun)...

...Transforms/Scalar/DeadStoreElimination.cpp (working copy) > @@ -117,10 +117,12 @@ > > // If this is a store-store dependence, then the previous store > is dead so > // long as this store is at least as big as it. > - if (StoreInst *DepStore = dyn_cast<StoreInst>(InstDep.getInst())) > - if (TD && > - TD->getTypeStoreSize(DepStore->getOperand(0)->getType()) <= > - TD->getTypeStoreSize(SI->getOperand(0)->getType())) { > + if (StoreInst *DepStore = dyn_cast<StoreInst>(InstDep.getInst > ())) {...

Re-posting with better-looking code. Hans Wennborg wrote: > The attached patch makes DeadStoreElimination able to remove stores in > store-store dependencies when the operand types are equal, even if there > is no TargetData available. > > / Hans > > > ------------------------------------------------------------------------ > >

The attached patch makes DeadStoreElimination able to remove stores in store-store dependencies when the operand types are equal, even if there is no TargetData available. / Hans -------------- next part -------------- A non-text attachment was scrubbed... Name: DeadStoreElimination.patch Type: text/x-patch Size: 812 bytes Desc: not available URL:

...eElimination.cpp (working copy) >> @@ -117,10 +117,12 @@ >> >> // If this is a store-store dependence, then the previous store is >> dead so >> // long as this store is at least as big as it. >> - if (StoreInst *DepStore = dyn_cast<StoreInst>(InstDep.getInst())) >> - if (TD && >> - TD->getTypeStoreSize(DepStore->getOperand(0)->getType()) <= >> - TD->getTypeStoreSize(SI->getOperand(0)->getType())) { >> + if (StoreInst *DepStore = dyn_cast<StoreInst>(InstDep.getI...