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headnodes
2015 Feb 13
2
[LLVMdev] DAGCombiner::MergeConsecutiveStores
...biner where it
merges loads in MergeConsecutiveStores.
Two 16bit loads have been merged to one 32bit load, and two 16bit stores
have been combined to one 32bit store.
And then the code goes like this:
// Replace one of the loads with the new load.
LoadSDNode *Ld = cast<LoadSDNode>(LoadNodes[0].MemNode);
DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1),
SDValue(NewLoad.getNode(), 1));
// Remove the rest of the load chains.
for (unsigned i = 1; i < NumElem ; ++i) {
// Replace all chain users of the old load nodes with the chain of
the new...