Mapping instructions between original and modified scop

[Ejjeh, Adel]

Hi

 

I am using polly in my own LLVM pass where I modify the schedule of a given scop then directly invoke “polly::CodeGen()” to codegen the updated loop with the new schedule. I have modified the CodeGen() method to where I always only include the new loop instead of conditionally executing it since that fits with the requirements of my pass. I am trying to find a way to map the memory instructions in the original scop to the newly generated one since I need to do some post processing on them after codegen. Is there an existing data structure or mechanism within the Polly environment that can give me that information?

 

Thanks

-Adel

[Michael Kruse]

If I understand correctly, you are looking for the LoadInst or StoreInst for a given MemoryAccess object? MemoryAccess::getAccessInstruction() will return this.

Be aware that there can be multiple MemoryAccesses associated with the same  llvm::Instructions. For instance, when 

%ld = load i8, ptr %ptr

there can be one MemoryAccess for reading from %ptr, and a write MemoryAccess for storing the result in the register %ld (depends on how %ld is used).

Michael

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