[LLVMdev] Memory Altering/Accessing Instructions

Prakash Prabhu prakash.prabhu at gmail.com
Wed Sep 24 13:22:37 PDT 2008


Hi all,

Would it be correct to say that the only instructions in LLVM IR that
modify/access memory potentially are the following:

(1) LoadInst : Ref
(2) StoreInst : Mod
(3) VAArgInst : Ref (?)
(4) AllocaInst : Mod
(5) MallocInst : Mod
(6) FreeInst : Mod
(7) CallInst : Mod/Ref ?

Also, my earlier impression was that the GEP instruction only computes
the effective address and does not modify/access any memory location.
Is that true ?
If I have missed other instructions that could alter/modify memory,
please let me know.

Thanks for your time.

- Prakash



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