[PATCH] D51396: [Constant Hoisting] Hoisting Constant GEP Expressions

[Z. Zheng via Phabricator via llvm-commits]

zzheng created this revision.
zzheng added reviewers: efriedma, t.p.northover, javed.absar, wmi, SjoerdMeijer, mehdi_amini.

Leverage existing logic in constant hoisting pass so that constant gep expressions
sharing the same base global variable are transformed into the form of
[Base + Offset], where Base is a constant gep and Offset is an integer.

      

This transformation can effectively reduce constant pool entries in the backend.


Repository:
  rL LLVM

https://reviews.llvm.org/D51396

Files:
  include/llvm/Transforms/Scalar/ConstantHoisting.h
  lib/Transforms/Scalar/ConstantHoisting.cpp
  test/Transforms/ConstantHoisting/AArch64/const-hoist-gep.ll
  test/Transforms/ConstantHoisting/ARM/const-hoist-gep.ll
  test/Transforms/ConstantHoisting/ARM/same-offset-multi-types.ll

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