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Add plumbing for the `linker_private' linkage type. This type is meant for

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"private" symbols which the assember shouldn't strip, but which the linker may
remove after evaluation. This is mostly useful for Objective-C metadata.

This is plumbing, so we don't have a use of it yet. More to come, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76385 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2009-07-20 01:03:30 +00:00
parent 3f189a3eb4
commit 3d10a5a757
29 changed files with 199 additions and 96 deletions
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26
docs/LangRef.html
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@@ -20,7 +20,24 @@
<li><a href="#highlevel">High Level Structure</a>
<ol>
<li><a href="#modulestructure">Module Structure</a></li>
<li><a href="#linkage">Linkage Types</a></li>
<li><a href="#linkage">Linkage Types</a>
<ol>
<li><a href="#linkage_private">private</a></li>
<li><a href="#linkage_linker_private">linker_private</a></li>
<li><a href="#linkage_internal">internal</a></li>
<li><a href="#linkage_available_externally">available_externally</a></li>
<li><a href="#linkage_linkonce">linkonce</a></li>
<li><a href="#linkage_common">common</a></li>
<li><a href="#linkage_weak">weak</a></li>
<li><a href="#linkage_appending">appending</a></li>
<li><a href="#linkage_externweak">extern_weak</a></li>
<li><a href="#linkage_linkonce">linkonce_odr</a></li>
<li><a href="#linkage_weak">weak_odr</a></li>
<li><a href="#linkage_external">externally visible</a></li>
<li><a href="#linkage_dllimport">dllimport</a></li>
<li><a href="#linkage_dllexport">dllexport</a></li>
</ol>
</li>
<li><a href="#callingconv">Calling Conventions</a></li>
<li><a href="#namedtypes">Named Types</a></li>
<li><a href="#globalvars">Global Variables</a></li>
@@ -502,6 +519,11 @@ All Global Variables and Functions have one of the following types of linkage:
object file.
</dd>
<dt><tt><b><a name="linkage_linker_private">linker_private</a></b></tt>: </dt>
<dd>Similar to private, but the symbol is passed through the assembler and
removed by the linker after evaluation.</dd>
<dt><tt><b><a name="linkage_internal">internal</a></b></tt>: </dt>
<dd> Similar to private, but the value shows as a local symbol (STB_LOCAL in
@@ -509,7 +531,7 @@ All Global Variables and Functions have one of the following types of linkage:
'<tt>static</tt>' keyword in C.
</dd>
<dt><tt><b><a name="available_externally">available_externally</a></b></tt>:
<dt><tt><b><a name="linkage_available_externally">available_externally</a></b></tt>:
</dt>
<dd>Globals with "<tt>available_externally</tt>" linkage are never emitted