[llvm-branch-commits] [CodeGen] Prevent register coalescer rematerialization based on target (PR #148430)

[Matt Arsenault via llvm-branch-commits]

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@@ -1400,6 +1403,12 @@ bool RegisterCoalescer::reMaterializeTrivialDef(const CoalescerPair &CP,
   if (!Edit.canRematerializeAt(RM, ValNo, CopyIdx))
     return false;
 
+  if (!TII->shouldReMaterializeTrivialRegDef(CopyMI, DstReg, SrcReg)) {
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arsenm wrote:

Missing an implementation of this? Also this API seems lacking in parameters. At minimum should probably be passing in LiveIntervals, the function

https://github.com/llvm/llvm-project/pull/148430