[llvm] [DebugInfo][RemoveDIs] Support maintaining DPValues in CodeGenPrepare (PR #73660)

[Orlando Cazalet-Hyams via llvm-commits]

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@@ -8359,6 +8391,30 @@ bool CodeGenPrepare::fixupDbgValue(Instruction *I) {
   return AnyChange;
 }
 
+bool CodeGenPrepare::fixupDPValue(DPValue &DPV) {
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OCHyams wrote:

The debug intrinsic path asserts that it's a `DbgValueInst`. `fixupDbgValue` is only called on dbg_value (and dbg_assign)-type intrinsics, whereas `fixupDPVAlue` is called without first filtering by DPValue kind. This is fine - no action required.

https://github.com/llvm/llvm-project/pull/73660