[PATCH] Optimize InstCombine stack memory consumption

[Reid Kleckner]

lgtm

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Comment at: lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp:63
@@ +62,3 @@
+    const bool IsOffset = ValuePair.second;
+    for (auto &Use : ValuePair.first->uses()) {
+      Instruction *I = cast<Instruction>(Use.getUser());
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Why rename 'U' to 'Use'?  'Use' already a type, so this is a bit confusing.  If anything, this loop should iterate over users, not uses.

http://reviews.llvm.org/D4355