[llvm] improve performance of Module Analysis stage in the part of processing "other instructions" (PR #76047)

[Noel Grandin via llvm-commits]

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@@ -319,15 +291,43 @@ void SPIRVModuleAnalysis::collectFuncNames(MachineInstr &MI,
   }
 }
 
+using InstrSignature = SmallVector<size_t>;
+using InstrTraces = std::set<InstrSignature>;
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grandinj wrote:

could use std::unordered_set here, since this code doesn't seem to care about ordering?

https://github.com/llvm/llvm-project/pull/76047