[llvm] [RA] Disable split around hint register if optimize for size (PR #68619)

[via llvm-commits]

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@@ -1217,6 +1217,9 @@ bool RAGreedy::trySplitAroundHintReg(MCPhysReg Hint,
                                      const LiveInterval &VirtReg,
                                      SmallVectorImpl<Register> &NewVRegs,
                                      AllocationOrder &Order) {
+  if (MF->getFunction().hasOptSize())
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zmodem wrote:

We should probably add a comment explaining why (may increase code size).

https://github.com/llvm/llvm-project/pull/68619