[llvm] [RISCV] Rematerialize load (PR #73924)

[Matt Arsenault via llvm-commits]

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@@ -1567,6 +1573,36 @@ bool RISCVInstrInfo::isAsCheapAsAMove(const MachineInstr &MI) const {
   return MI.isAsCheapAsAMove();
 }
 
+bool RISCVInstrInfo::isReallyTriviallyReMaterializable(
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arsenm wrote:

This is a correctness predicate and you've added performance heuristics; this should go somewhere else 

https://github.com/llvm/llvm-project/pull/73924