[llvm] [ReachingDefAnalysis] Extend the analysis to stack objects. (PR #118097)

[Michael Maitland via llvm-commits]

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@@ -234,7 +301,10 @@ void ReachingDefAnalysis::reset() {
 
 void ReachingDefAnalysis::init() {
   NumRegUnits = TRI->getNumRegUnits();
+  NumStackObjects = MF->getFrameInfo().getNumObjects();
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michaelmaitland wrote:

I think you have NumStackObjects and ObjectIndexBegin information in `isFIDef` through `MI.getParent()->getFrameInfo().getNumObjects()` and `MI.getParent()->getFrameInfo().getObjectIndexBegin()`. Do you need to make them member variables?

https://github.com/llvm/llvm-project/pull/118097