[PATCH] D14340: [DAGCombiner] Improve zextload optimization.

[Matt Arsenault via llvm-commits]

arsenm added a subscriber: arsenm.

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Comment at: lib/CodeGen/SelectionDAG/DAGCombiner.cpp:3020-3022
@@ +3019,5 @@
+
+  // Do not change the width of a volatile load.
+  // Do not generate loads of non-round integer types since these can
+  // be expensive (and would be wrong if the type is not byte sized).
+  if (!LoadN->isVolatile() && LoadedVT.bitsGT(ExtVT) && ExtVT.isRound() &&
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Should this check TLI,shouldReduceLoadWidth? It maybe should go along with the other tests before the place this is called


http://reviews.llvm.org/D14340