[PATCH] [LSR] canonicalize Prod*(1<<C) to Prod<<C

[Jingyue Wu]

================
Comment at: lib/Analysis/ScalarEvolutionExpander.cpp:791
@@ -784,3 +790,3 @@
     const APInt &RHS = SC->getValue()->getValue();
     if (RHS.isPowerOf2())
       return InsertBinop(Instruction::LShr, LHS,
----------------
Btw, visitUDivExpr does similar canonicalization too.

http://reviews.llvm.org/D10448

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