tree aa2150ae76626e9ba698cd78b169dfde370c9cf2
parent c3b5c98e39533302d27f13895dad1e7b2e425f68
author Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> 1585778292 -0700
committer Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> 1585848407 -0700

[AMDGPU] Fix crash in SILoadStoreOptimizer

SILoadStoreOptimizer::checkAndPrepareMerge() expects base and
paired instruction to come in order and scans MBB from base to
the paired instruction. An original order can be changed if
there were a dependent instruction in between and base instruction
was moved.

Fixed by bailing the optimization. In theory it might be possible
still to perform a merge by swapping instructions, but on practice
it bails anyway because it finds dependency on that same instruction
which has resulted in the base move.

Differential Revision: https://reviews.llvm.org/D77245