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Update the -tailcallopt description to match djg's improvements to the calling 

convention. 

llvm-svn: 93167
This commit is contained in:
Jeffrey Yasskin 2010-01-11 18:53:47 +00:00
parent 133bc74d7a
commit 81e7fb15e9
1 changed files with 0 additions and 5 deletions
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llvm/docs/CodeGenerator.html
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@ -1731,11 +1731,6 @@ define fastcc i32 @tailcaller(i32 %in1, i32 %in2) {
(because one or more of above constraints are not met) to be followed by a
readjustment of the stack. So performance might be worse in such cases.</p>
<p>On x86 and x86-64 one register is reserved for indirect tail calls (e.g via a
function pointer). So there is one less register for integer argument
passing. For x86 this means 2 registers (if <tt>inreg</tt> parameter
attribute is used) and for x86-64 this means 5 register are used.</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection">