[PATCH] D13294: LEA code size optimization pass (Part 1): Remove redundant address recalculations

[Andrey Turetskiy via llvm-commits]

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

Add new x86 pass which replaces address calculations in load or store instructions with LEA def register, if the LEA calculates address that differs only by a displacement. Works only with -Os or -Oz.

http://reviews.llvm.org/D13294

Files:
  lib/Target/X86/CMakeLists.txt
  lib/Target/X86/X86.h
  lib/Target/X86/X86OptimizeLEAs.cpp
  lib/Target/X86/X86TargetMachine.cpp
  test/CodeGen/X86/lea-opt.ll

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