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| author | Anton Korobeynikov <asl@math.spbu.ru> | 2007-01-28 14:30:45 +0000 |
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| committer | Anton Korobeynikov <asl@math.spbu.ru> | 2007-01-28 14:30:45 +0000 |
| commit | 34d6dea84935d865965b9fc63ef6d42192da0a51 (patch) | |
| tree | be7e47d8cd46361d5c558b47083b298da55754ec /docs/LangRef.html | |
| parent | 9adeaa2f5989239c18109fb79dc75847ec21ea39 (diff) | |
| download | llvm-34d6dea84935d865965b9fc63ef6d42192da0a51.tar.gz llvm-34d6dea84935d865965b9fc63ef6d42192da0a51.tar.bz2 llvm-34d6dea84935d865965b9fc63ef6d42192da0a51.tar.xz | |
Document 'inreg' & 'sret'
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33600 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/LangRef.html')
| -rw-r--r-- | docs/LangRef.html | 26 |
1 files changed, 7 insertions, 19 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index a1c9a2808d..4de7f3609b 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -530,19 +530,6 @@ the future:</p> prototype and implemented declaration of the function (as does normal C). </dd> - <dt><b>"<tt>csretcc</tt>" - The C struct return calling convention</b>:</dt> - - <dd>This calling convention matches the target C calling conventions, except - that functions with this convention are required to take a pointer as their - first argument, and the return type of the function must be void. This is - used for C functions that return aggregates by-value. In this case, the - function has been transformed to take a pointer to the struct as the first - argument to the function. For targets where the ABI specifies specific - behavior for structure-return calls, the calling convention can be used to - distinguish between struct return functions and other functions that take a - pointer to a struct as the first argument. - </dd> - <dt><b>"<tt>fastcc</tt>" - The fast calling convention</b>:</dt> <dd>This calling convention attempts to make calls as fast as possible @@ -743,14 +730,15 @@ a power of 2.</p> <dt><tt>sext</tt></dt> <dd>This indicates that the parameter should be sign extended just before a call to this function.</dd> + <dt><tt>inreg</tt></dt> + <dd>This indicates that the parameter should be placed in register (if + possible) during assembling function call. It's currently supported in x86 + backend only.</dd> + <dt><tt>sret</tt></dt> + <dd>This indicates, that the parameter is special hidden pointer to struct + to return. Usually such parameter needs special handling during codegen.</dd> </dl> - <p>The current motivation for parameter attributes is to enable the sign and - zero extend information necessary for the C calling convention to be passed - from the front end to LLVM. The <tt>zext</tt> and <tt>sext</tt> attributes - are used by the code generator to perform the required extension. However, - parameter attributes are an orthogonal feature to calling conventions and - may be used for other purposes in the future.</p> </div> <!-- ======================================================================= --> |