llvm-project

9ba52442 - [LV] Add option to still enable the legacy cost model. (#99536)

[LV] Add option to still enable the legacy cost model. (#99536) This patch adds a new temporary option to still use the legacy cost model after https://github.com/llvm/llvm-project/pull/92555. It defaults to false and the only intended use is to adjust the default to true in the soon-to-be-cut release branch. PR: https://github.com/llvm/llvm-project/pull/99536