[PATCH] D13295: LEA code size optimization pass (Part 2): Remove redundant LEA instructions

[Andrey Turetskiy via llvm-commits]

aturetsk created this revision.
aturetsk added a reviewer: nadav.
aturetsk added a subscriber: llvm-commits.

Make x86 OptimizeLEAs pass remove LEA instruction if there is another LEA which calculates address differing only be a displacement. Works only for -Oz.

http://reviews.llvm.org/D13295

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

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