[PATCH] D11051: Extend LICM to hoist loop invariant GEP out

[hfinkel at anl.gov]

hfinkel added a comment.

In http://reviews.llvm.org/D11051#213677, @atrick wrote:

> If you need to do this transformation is cases where the inbounds flag will be dropped it seems best to do it late in the pipeline (maybe even after LSR) as a target-controlled optimization. Arranging for the hoisting to happen seems like the easy part of this problem.


I agree. Also, as it turns out, both NVPTX and PowerPC run LICM late in the pipeline, and AArch64 can as well when -aarch64-gep-opt is enabled (PowerPC also runs it under the control of -ppc-gep-opt, but unlike AArch64, it is currently on by default).

> Out of curiosity, I wonder if the LSR fix here http://reviews.llvm.org/D11212 has any impact on this test case.



Repository:
  rL LLVM

http://reviews.llvm.org/D11051