[PATCH] D28701: [CodeGenPrep]Sink sext when foldable in user GEPs

[Jun Bum Lim via Phabricator via llvm-commits]

junbuml created this revision.
junbuml added reviewers: qcolombet, jmolloy, mcrosier.
junbuml added a subscriber: llvm-commits.

Sink sign extensions to user blocks if foldable as a part of address calculation by the local ISel when placed in the same block. With this change, 3% performance gain was observed in spec2006/astar. The test case was reduced from spec2006/astar wayobj::makebound2() function.

This change was initially proposed in https://reviews.llvm.org/D26524 and now I do this in CGP based on https://reviews.llvm.org/D27853 and  https://reviews.llvm.org/D28680.


https://reviews.llvm.org/D28701

Files:
  aarch64-address-type-promotion-sink.ll
  lib/CodeGen/CodeGenPrepare.cpp

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