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<meta name="author" content="Chris Lattner">
<meta name="author" content="Erick Tryzelaar">
- <link rel="stylesheet" href="../llvm.css" type="text/css">
+ <link rel="stylesheet" href="../_static/llvm.css" type="text/css">
</head>
<body>
-<div class="doc_title">Kaleidoscope: Extending the Language: User-defined Operators</div>
+<h1>Kaleidoscope: Extending the Language: User-defined Operators</h1>
<ul>
<li><a href="index.html">Up to Tutorial Index</a></li>
</div>
<!-- *********************************************************************** -->
-<div class="doc_section"><a name="intro">Chapter 6 Introduction</a></div>
+<h2><a name="intro">Chapter 6 Introduction</a></h2>
<!-- *********************************************************************** -->
-<div class="doc_text">
+<div>
<p>Welcome to Chapter 6 of the "<a href="index.html">Implementing a language
with LLVM</a>" tutorial. At this point in our tutorial, we now have a fully
</div>
<!-- *********************************************************************** -->
-<div class="doc_section"><a name="idea">User-defined Operators: the Idea</a></div>
+<h2><a name="idea">User-defined Operators: the Idea</a></h2>
<!-- *********************************************************************** -->
-<div class="doc_text">
+<div>
<p>
The "operator overloading" that we will add to Kaleidoscope is more general than
</div>
<!-- *********************************************************************** -->
-<div class="doc_section"><a name="binary">User-defined Binary Operators</a></div>
+<h2><a name="binary">User-defined Binary Operators</a></h2>
<!-- *********************************************************************** -->
-<div class="doc_text">
+<div>
<p>Adding support for user-defined binary operators is pretty simple with our
current framework. We'll first add support for the unary/binary keywords:</p>
end;</b>
(* Create a new basic block to start insertion into. *)
- let bb = append_block "entry" the_function in
+ let bb = append_block context "entry" the_function in
position_at_end bb builder;
...
</pre>
</div>
<!-- *********************************************************************** -->
-<div class="doc_section"><a name="unary">User-defined Unary Operators</a></div>
+<h2><a name="unary">User-defined Unary Operators</a></h2>
<!-- *********************************************************************** -->
-<div class="doc_text">
+<div>
<p>Since we don't currently support unary operators in the Kaleidoscope
language, we'll need to add everything to support them. Above, we added simple
</div>
<!-- *********************************************************************** -->
-<div class="doc_section"><a name="example">Kicking the Tires</a></div>
+<h2><a name="example">Kicking the Tires</a></h2>
<!-- *********************************************************************** -->
-<div class="doc_text">
+<div>
<p>It is somewhat hard to believe, but with a few simple extensions we've
covered in the last chapters, we have grown a real-ish language. With this, we
def unary-(v)
0-v;
-# Define > with the same precedence as >.
+# Define > with the same precedence as <.
def binary> 10 (LHS RHS)
RHS < LHS;
: putchard(10)
)
-# mandel - This is a convenient helper function for ploting the mandelbrot set
+# mandel - This is a convenient helper function for plotting the mandelbrot set
# from the specified position with the specified Magnification.
def mandel(realstart imagstart realmag imagmag)
mandelhelp(realstart, realstart+realmag*78, realmag,
<!-- *********************************************************************** -->
-<div class="doc_section"><a name="code">Full Code Listing</a></div>
+<h2><a name="code">Full Code Listing</a></h2>
<!-- *********************************************************************** -->
-<div class="doc_text">
+<div>
<p>
Here is the complete code listing for our running example, enhanced with the
ocaml_lib ~extern:true "llvm_target";;
ocaml_lib ~extern:true "llvm_scalar_opts";;
-flag ["link"; "ocaml"; "g++"] (S[A"-cc"; A"g++"]);;
+flag ["link"; "ocaml"; "g++"] (S[A"-cc"; A"g++"; A"-cclib"; A"-rdynamic"]);;
dep ["link"; "ocaml"; "use_bindings"] ["bindings.o"];;
</pre>
</dd>
let the_module = create_module context "my cool jit"
let builder = builder context
let named_values:(string, llvalue) Hashtbl.t = Hashtbl.create 10
+let double_type = double_type context
let rec codegen_expr = function
| Ast.Number n -> const_float double_type n
let start_bb = insertion_block builder in
let the_function = block_parent start_bb in
- let then_bb = append_block "then" the_function in
+ let then_bb = append_block context "then" the_function in
(* Emit 'then' value. *)
position_at_end then_bb builder;
let new_then_bb = insertion_block builder in
(* Emit 'else' value. *)
- let else_bb = append_block "else" the_function in
+ let else_bb = append_block context "else" the_function in
position_at_end else_bb builder;
let else_val = codegen_expr else_ in
let new_else_bb = insertion_block builder in
(* Emit merge block. *)
- let merge_bb = append_block "ifcont" the_function in
+ let merge_bb = append_block context "ifcont" the_function in
position_at_end merge_bb builder;
let incoming = [(then_val, new_then_bb); (else_val, new_else_bb)] in
let phi = build_phi incoming "iftmp" builder in
* block. *)
let preheader_bb = insertion_block builder in
let the_function = block_parent preheader_bb in
- let loop_bb = append_block "loop" the_function in
+ let loop_bb = append_block context "loop" the_function in
(* Insert an explicit fall through from the current block to the
* loop_bb. *)
(* Create the "after loop" block and insert it. *)
let loop_end_bb = insertion_block builder in
- let after_bb = append_block "afterloop" the_function in
+ let after_bb = append_block context "afterloop" the_function in
(* Insert the conditional branch into the end of loop_end_bb. *)
ignore (build_cond_br end_cond loop_bb after_bb builder);
end;
(* Create a new basic block to start insertion into. *)
- let bb = append_block "entry" the_function in
+ let bb = append_block context "entry" the_function in
position_at_end bb builder;
try
the_execution_engine in
print_string "Evaluated to ";
- print_float (GenericValue.as_float double_type result);
+ print_float (GenericValue.as_float Codegen.double_type result);
print_newline ();
with Stream.Error s | Codegen.Error s ->
(* Skip token for error recovery. *)
let stream = Lexer.lex (Stream.of_channel stdin) in
(* Create the JIT. *)
- let the_module_provider = ModuleProvider.create Codegen.the_module in
- let the_execution_engine = ExecutionEngine.create the_module_provider in
- let the_fpm = PassManager.create_function the_module_provider in
+ let the_execution_engine = ExecutionEngine.create Codegen.the_module in
+ let the_fpm = PassManager.create_function Codegen.the_module in
(* Set up the optimizer pipeline. Start with registering info about how the
* target lays out data structures. *)
- TargetData.add (ExecutionEngine.target_data the_execution_engine) the_fpm;
+ DataLayout.add (ExecutionEngine.target_data the_execution_engine) the_fpm;
(* Do simple "peephole" optimizations and bit-twiddling optzn. *)
- add_instruction_combining the_fpm;
+ add_instruction_combination the_fpm;
(* reassociate expressions. *)
add_reassociation the_fpm;
<a href="mailto:sabre@nondot.org">Chris Lattner</a><br>
<a href="mailto:idadesub@users.sourceforge.net">Erick Tryzelaar</a><br>
- <a href="http://llvm.org">The LLVM Compiler Infrastructure</a><br>
- Last modified: $Date: 2007-10-17 11:05:13 -0700 (Wed, 17 Oct 2007) $
+ <a href="http://llvm.org/">The LLVM Compiler Infrastructure</a><br>
+ Last modified: $Date$
</address>
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