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Update the "hello world" example to resemble what we currently output.

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Also do some minor reformatting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152707 91177308-0d34-0410-b5e6-96231b3b80d8
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Bill Wendling 2012-03-14 08:07:43 +00:00
parent 3d1d895c86
commit 4cc2be672f
1 changed files with 15 additions and 15 deletions
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@ -490,43 +490,43 @@
<div> <div>
<p>LLVM programs are composed of "Module"s, each of which is a translation unit <p>LLVM programs are composed of <tt>Module</tt>s, each of which is a
of the input programs. Each module consists of functions, global variables, translation unit of the input programs. Each module consists of functions,
and symbol table entries. Modules may be combined together with the LLVM global variables, and symbol table entries. Modules may be combined together
linker, which merges function (and global variable) definitions, resolves with the LLVM linker, which merges function (and global variable)
forward declarations, and merges symbol table entries. Here is an example of definitions, resolves forward declarations, and merges symbol table
the "hello world" module:</p> entries. Here is an example of the "hello world" module:</p>
<pre class="doc_code"> <pre class="doc_code">
<i>; Declare the string constant as a global constant.</i>&nbsp; <i>; Declare the string constant as a global constant.</i>&nbsp;
<a href="#identifiers">@.LC0</a> = <a href="#linkage_internal">internal</a>&nbsp;<a href="#globalvars">constant</a>&nbsp;<a href="#t_array">[13 x i8]</a> c"hello world\0A\00" <i>; [13 x i8]*</i>&nbsp; <a href="#identifiers">@.str</a> = <a href="#linkage_private">private</a>&nbsp;<a href="#globalvars">unnamed_addr</a>&nbsp;<a href="#globalvars">constant</a>&nbsp;<a href="#t_array">[13 x i8]</a> c"hello world\0A\00"&nbsp;
<i>; External declaration of the puts function</i>&nbsp; <i>; External declaration of the puts function</i>&nbsp;
<a href="#functionstructure">declare</a> i32 @puts(i8*) <i>; i32 (i8*)* </i>&nbsp; <a href="#functionstructure">declare</a> i32 @puts(i8* <a href="#nocapture">nocapture</a>) <a href="#fnattrs">nounwind</a>&nbsp;
<i>; Definition of main function</i> <i>; Definition of main function</i>
define i32 @main() { <i>; i32()* </i>&nbsp; define i32 @main() { <i>; i32()* </i>&nbsp;
<i>; Convert [13 x i8]* to i8 *...</i>&nbsp; <i>; Convert [13 x i8]* to i8 *...</i>&nbsp;
%cast210 = <a href="#i_getelementptr">getelementptr</a> [13 x i8]* @.LC0, i64 0, i64 0 <i>; i8*</i>&nbsp; %cast210 = <a href="#i_getelementptr">getelementptr</a> [13 x i8]* @.str, i64 0, i64 0
<i>; Call puts function to write out the string to stdout.</i>&nbsp; <i>; Call puts function to write out the string to stdout.</i>&nbsp;
<a href="#i_call">call</a> i32 @puts(i8* %cast210) <i>; i32</i>&nbsp; <a href="#i_call">call</a> i32 @puts(i8* %cast210)
<a href="#i_ret">ret</a> i32 0&nbsp; <a href="#i_ret">ret</a> i32 0&nbsp;
} }
<i>; Named metadata</i> <i>; Named metadata</i>
!1 = metadata !{i32 41} !1 = metadata !{i32 42}
!foo = !{!1, null} !foo = !{!1, null}
</pre> </pre>
<p>This example is made up of a <a href="#globalvars">global variable</a> named <p>This example is made up of a <a href="#globalvars">global variable</a> named
"<tt>.LC0</tt>", an external declaration of the "<tt>puts</tt>" function, "<tt>.str</tt>", an external declaration of the "<tt>puts</tt>" function,
a <a href="#functionstructure">function definition</a> for a <a href="#functionstructure">function definition</a> for
"<tt>main</tt>" and <a href="#namedmetadatastructure">named metadata</a> "<tt>main</tt>" and <a href="#namedmetadatastructure">named metadata</a>
"<tt>foo"</tt>.</p> "<tt>foo</tt>".</p>
<p>In general, a module is made up of a list of global values, where both <p>In general, a module is made up of a list of global values (where both
functions and global variables are global values. Global values are functions and global variables are global values). Global values are
represented by a pointer to a memory location (in this case, a pointer to an represented by a pointer to a memory location (in this case, a pointer to an
array of char, and a pointer to a function), and have one of the array of char, and a pointer to a function), and have one of the
following <a href="#linkage">linkage types</a>.</p> following <a href="#linkage">linkage types</a>.</p>