How to specify address of an extern variable in llvm bitcode?
Say, I have an int variable declared as
extern int key;
and the address of the variable is 0x7f4c2dacf000
Is there a way to modify the llvm bitcode to specify the variable’s address?
Don’t think so. But you could skip using a variable entirely if you know it’s at a constant address, instead of needing a symbol lookup.
You could skip it by taking the pointer constant as an integer constant and int2ptr casting it to a pointer, then loading from that - not using a global variable (decl or def) instead.
But probably using a symbol is better/more flexible.