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Diffstat (limited to 'docs/LangRef.html')
| -rw-r--r-- | docs/LangRef.html | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index 910fc5c651..dced11c441 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -94,6 +94,8 @@ <li><a href="#intrinsic_globals">Intrinsic Global Variables</a> <ol> <li><a href="#intg_used">The '<tt>llvm.used</tt>' Global Variable</a></li> + <li><a href="#intg_compiler_used">The '<tt>llvm.compiler.used</tt>' + Global Variable</a></li> <li><a href="#intg_global_ctors">The '<tt>llvm.global_ctors</tt>' Global Variable</a></li> <li><a href="#intg_global_dtors">The '<tt>llvm.global_dtors</tt>' @@ -2168,8 +2170,9 @@ call void asm sideeffect "eieio", ""() <p>LLVM has a number of "magic" global variables that contain data that affect code generation or other IR semantics. These are documented here. All globals -of this sort should have a section specified as "llvm.metadata". This section -and all globals that start with "llvm." are reserved for LLVM.</p> +of this sort should have a section specified as "<tt>llvm.metadata</tt>". This +section and all globals that start with "<tt>llvm.</tt>" are reserved for use +by LLVM.</p> <!-- ======================================================================= --> <div class="doc_subsection"> @@ -2208,6 +2211,24 @@ object file to prevent the assembler and linker from molesting the symbol.</p> <!-- ======================================================================= --> <div class="doc_subsection"> +<a name="intg_compiler_used">The '<tt>llvm.compiler.used</tt>' Global Variable</a> +</div> + +<div class="doc_text"> + +<p>The <tt>@llvm.compiler.used</tt> directive is the same as the +<tt>@llvm.used</tt> directive, except that it only prevents the compiler from +touching the symbol. On targets that support it, this allows an intelligent +linker to optimize references to the symbol without being impeded as it would be +by <tt>@llvm.used</tt>.</p> + +<p>This is a rare construct that should only be used in rare circumstances, and +should not be exposed to source languages.</p> + +</div> + +<!-- ======================================================================= --> +<div class="doc_subsection"> <a name="intg_global_ctors">The '<tt>llvm.global_ctors</tt>' Global Variable</a> </div> |