[LLVMdev] Statically Initialized Arrays

Evan Jones ejones at uwaterloo.ca
Wed Nov 2 12:58:01 PST 2005

I am trying to generate LLVM code that references a global array. 
Unfortunately, while I am generating the code I do not know the final 
length of the array, as I add elements to it as my compiler goes along. 
What is the best way to do this in LLVM? Ideally, I would be able to 
define the GlobalVariable array and change its length later on. I would 
love for it to have the correct length so I can leverage some of LLVM's 
static checking.

I've been thinking that one level of indirection would solve the 
problem for me. What I could do is reference the global array via a 
function call while generating the code. Then, at the end, I would 
generate both the array and the function body:

int array[size] = { ... };

int* globalArray( int index )
	return &array[index];

Ideally, LLVM could then inline the function. Is there a better way to 
arrange for this to occur? Should I not care about array lengths and 
just have my global variable be a pointer?

Thanks for the advice,

Evan Jones

Evan Jones

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