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Diffstat (limited to 'docs/tutorial/JITTutorial1.html')
| -rw-r--r-- | docs/tutorial/JITTutorial1.html | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/docs/tutorial/JITTutorial1.html b/docs/tutorial/JITTutorial1.html index 5a2dcd0cbe..9819c77e0b 100644 --- a/docs/tutorial/JITTutorial1.html +++ b/docs/tutorial/JITTutorial1.html @@ -50,7 +50,18 @@ entry: <p>If you're unsure what the above code says, skim through the <a href="../LangRef.html">LLVM Language Reference Manual</a> and convince yourself that the above LLVM IR is actually equivalent to the original function. Once you’re satisfied with that, let’s move on to actually generating it programmatically!</p> -<p>... STUFF ABOUT HEADERS ... </p> +<p>Of course, before we can start, we need to <code>#include</code> the appropriate LLVM header files:</p> + +<div class="doc_code"> +<pre> +#include <llvm/Module.h> +#include <llvm/Function.h> +#include <llvm/PassManager.h> +#include <llvm/Analysis/Verifier.h> +#include <llvm/Assembly/PrintModulePass.h> +#include <llvm/Support/LLVMBuilder.h> +</pre> +</div> <p>Now, let’s get started on our real program. Here’s what our basic <code>main()</code> will look like:</p> @@ -153,9 +164,16 @@ Module* makeLLVMModule() { <p>The final step in creating our function is to create the instructions that make it up. Our <code>mul_add</code> function is composed of just three instructions: a multiply, an add, and a return. <code>LLVMBuilder</code> gives us a simple interface for constructing these instructions and appending them to the “entry” block. Each of the calls to <code>LLVMBuilder</code> returns a <code>Value*</code> that represents the value yielded by the instruction. You’ll also notice that, above, <code>x</code>, <code>y</code>, and <code>z</code> are also <code>Value*</code>’s, so it’s clear that instructions operate on <code>Value*</code>’s.</p> -<p>And that’s it! Now you can compile and run your code, and get a wonder textual print out of the LLVM IR we saw at the beginning.</p> +<p>And that’s it! Now you can compile and run your code, and get a wonderful textual print out of the LLVM IR we saw at the beginning. To compile, use the following commandline as a guide:</p> + +<div class="doc_code"> +<pre> +# c++ -g tut2.cpp `llvm-config --cppflags --ldflags --libs core` -o tut2 +# ./tut2 +</pre> +</div> -<p> ... SECTION ABOUT USING llvm-config TO GET THE NECESSARY COMPILER FLAGS TO COMPILE YOUR CODE ... </p> +<p>The <code>llvm-config</code> utility is used to obtain the necessary GCC-compatible compiler flags for linking with LLVM. For this example, we only need the 'core' library. We'll use others once we start adding optimizers and the JIT engine.</p> </div> |