declareFunction

the function description which is either a list with two
 elements giving the returnType and parameter types or a flat list of
 all the types with the first one being the return type

name

the module in which to declare the function

whether the routine is external or static or whatever
 type of linkage.

linkage

This function slightly simplifies declaring
 a function/routine to a module
 so that it can be referenced in the instructions
 we create. This is for an external routine, e.g. in a 3rd party library,
 or one that we will define later.

programming

This package is currently an interface to some of the
functionality in the llvm toolkit for programmaticall constructing native code.
This allows us to build "compilers" in R and use llvm's optmization and JIT techniques
to improve the code we generate and then turn it into machine code.
This is currently not a compiler. There are examples that illustrate how
to generate code to create native functions that are equivalent to
some simple R functions. The goal is to build on this and create a compiler,
hopefully building on the framework that Luke Tierney has created in his
compiler package (see http://www.cs.uiowa.edu/~luke/R/compiler/).
This is in the RLLVCompile package.
The speed up we achieve compiling R code in our examples illustrate that
we can significantly outperform the R interpreter and also
can outperform some of R's vectorized code by rearranging the computations,
e.g. fusing loops, avoiding memory usage.

declareFunction: Declare a function in a module

Description

Usage

Arguments

References