[llvm-branch-commits] [CodeGen] Add target hook shouldReMaterializeTrivialRegDef (PR #148429)

[Tomer Shafir via llvm-branch-commits]

tomershafir wrote:

Retreating back to a single commit patch for all of the changes, as the stacked PR is hard to operate.

https://github.com/llvm/llvm-project/pull/148429