[PATCH] D16404: [X86] Use hash table in LEA optimization pass

[Andrey Turetskiy via llvm-commits]

aturetsk created this revision.
aturetsk added reviewers: qcolombet, dberlin.
aturetsk added a subscriber: llvm-commits.

Use hash table (key is a memory operand) to store found LEA instructions to reduce compile time.
Also enable the pass back by default.

http://reviews.llvm.org/D16404

Files:
  lib/Target/X86/X86OptimizeLEAs.cpp
  test/CodeGen/X86/lea-opt.ll

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