[PATCH] D76639: Change X86RetpolineThunks from a MachineFunctionPass to a ModulePass

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

This probably has a hidden side effect on the pass manager construction. Inserting a module pass into the middle of the pipeline effectively introduces a serialization point in the middle of the pipeline. This means all functions have to reach this point in the pipeline before any function can continue. I believe this will cause the Machine IR for all functions to become resident in memory at once. This will substantially increase the memory usage of the compiler.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D76639/new/

https://reviews.llvm.org/D76639