[PATCH] D89693: [AArch64] Favor post-increments

Wed Oct 21 11:53:10 PDT 2020

SjoerdMeijer added a comment.

SPECInt numbers:

  500.perlbench_r	-0.36%
  502.gcc_r	 0.25%
  505.mcf_r	-0.23%
  520.omnetpp_r	-0.16%
  523.xalancbmk_r	-0.48%
  525.x264_r	 1.38%
  531.deepsjeng_r	-0.20%
  541.leela_r	-0.11%
  548.exchange2_r	 0.01%
  557.xz_r	-0.03%

These are runtime reduction in percentage, so negative is good, postive number is a regression. 
Overall, a small win, does what I want, except that `525.x264` is a bit of a negative outlier that makes things less rosy, and needs looking into. 
And also need to look what Sam has cooked up in  D89894 <https://reviews.llvm.org/D89894>....

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D89693/new/

https://reviews.llvm.org/D89693