[llvm-commits] [llvm] r43725 - /llvm/trunk/docs/tutorial/LangImpl3.html

[Chris Lattner]

Author: lattner
Date: Mon Nov  5 13:22:50 2007
New Revision: 43725

URL: http://llvm.org/viewvc/llvm-project?rev=43725&view=rev
Log:
clarify why prototype::codegen returns a function.

Modified:
    llvm/trunk/docs/tutorial/LangImpl3.html

Modified: llvm/trunk/docs/tutorial/LangImpl3.html
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/tutorial/LangImpl3.html?rev=43725&r1=43724&r2=43725&view=diff

==============================================================================
--- llvm/trunk/docs/tutorial/LangImpl3.html (original)
+++ llvm/trunk/docs/tutorial/LangImpl3.html Mon Nov  5 13:22:50 2007
@@ -293,7 +293,13 @@
 </pre>
 </div>
 
-<p>This code packs a lot of power into a few lines.  The first step is to create
+<p>This code packs a lot of power into a few lines.  Note first that this 
+function returns a Function* instead of a Value*.  Because a "prototype" really
+talks about the external interface for a function (not the value computed by
+an expression), it makes sense for it to return the LLVM Function it corresponds
+to when codegen'd.</p>
+
+<p>The next step is to create
 the <tt>FunctionType</tt> that should be used for a given Prototype.  Since all
 function arguments in Kaleidoscope are of type double, the first line creates
 a vector of "N" LLVM Double types.  It then uses the <tt>FunctionType::get</tt>