[PATCH] D37019: Add select simplifications

[Chad Rosier via Phabricator via llvm-commits]

mcrosier added a comment.

Unfortunately, we're seeing a 4.7% regression in SPEC2006/lbm due to this change.  The number of dynamic instructions is increased by ~5.5%.

We're running on AArch64/Falkor with the following flags: -O3 -fno-math-errno -ffp-contract=fast -fomit-frame-pointer

All of the code changes are in LBM_performStreamCollide(), which accounts for ~98% of execution.

I'll keep digging so I can provide more details, but I wanted to report the regression.


Repository:
  rL LLVM

https://reviews.llvm.org/D37019