[llvm] [MachinePipeliner] Add an abstract layer to manipulate Data Dependenc… (PR #109918)

[via llvm-commits]

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@@ -114,10 +118,123 @@ class MachinePipeliner : public MachineFunctionPass {
   bool useWindowScheduler(bool Changed);
 };
 
+/// Represents a dependnece between two instruction.
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aankit-ca wrote:

*dependnece -> dependence

https://github.com/llvm/llvm-project/pull/109918