[LLVMdev] What are all the LLVM IRs that will write into memory?

[Chuck Zhao]

LLVMers,

I need to intercept all LLVM IR instructions that will write into memory 
and start to do analysis on these instructions.

In addition to StoreInst, what are all other IRs that will write into 
memory?

E.g.
char * ptr = malloc(...);
///...
//with use(s) of ptr later

The LLVM IR for the above code would be:

   %0 = tail call noalias i8* @malloc(i32 137) nounwind

     ///...
     // use(s) of %0

LLVM's Language Reference has the instruction format for CallInst:

  <result>  = [tail] call [cconv  <http://llvm.org/docs/LangRef.html#callingconv>] [ret attrs  <http://llvm.org/docs/LangRef.html#paramattrs>]<ty>  [<fnty>*]<fnptrval>(<function args>) [fn attrs  <http://llvm.org/docs/LangRef.html#fnattrs>]


Does that mean any LLVM IR that has a valid result field will be able to 
store the result into memory?

How about those temps allocated into registers via register allocation?
Is there a way to tell such temps at compile time before RA?


Thank you very much

Chuck



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