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| author | Michael Gottesman <mgottesman@apple.com> | 2013-06-27 00:25:01 +0000 |
|---|---|---|
| committer | Michael Gottesman <mgottesman@apple.com> | 2013-06-27 00:25:01 +0000 |
| commit | 2253a2f52f3c46ae75cd05f5885acb987bd1d6b6 (patch) | |
| tree | 483f06fa8a9b2981c441c49dde73b45eb724c03d /docs | |
| parent | 9367c79e62307421f28ba92174f3792a6360f37b (diff) | |
| download | llvm-2253a2f52f3c46ae75cd05f5885acb987bd1d6b6.tar.gz llvm-2253a2f52f3c46ae75cd05f5885acb987bd1d6b6.tar.bz2 llvm-2253a2f52f3c46ae75cd05f5885acb987bd1d6b6.tar.xz | |
Added support for the Builtin attribute.
The Builtin attribute is an attribute that can be placed on function call site that signal that even though a function is declared as being a builtin,
rdar://problem/13727199
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185049 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/LangRef.rst | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/docs/LangRef.rst b/docs/LangRef.rst index cd72cc963e..b98332b3f6 100644 --- a/docs/LangRef.rst +++ b/docs/LangRef.rst @@ -822,6 +822,12 @@ example: computing edge weights, basic blocks post-dominated by a cold function call are also considered to be cold; and, thus, given low weight. +``builtin`` + This indicates that the callee function at a call site should be + recognized as a built-in function, even though the function's declaration + uses the ``nobuiltin'' attribute. This is only valid at call sites for + direct calls to functions which are declared with the ``nobuiltin`` + attribute. ``nonlazybind`` This attribute suppresses lazy symbol binding for the function. This may make calls to the function faster, at the cost of extra program @@ -835,11 +841,11 @@ example: This attribute disables prologue / epilogue emission for the function. This can have very system-specific consequences. ``nobuiltin`` - This indicates that the callee function at a call site is not - recognized as a built-in function. LLVM will retain the original call - and not replace it with equivalent code based on the semantics of the - built-in function. This is only valid at call sites, not on function - declarations or definitions. + This indicates that the callee function at a call site is not recognized as + a built-in function. LLVM will retain the original call and not replace it + with equivalent code based on the semantics of the built-in function, unless + the call site uses the ``builtin`` attribute. This is valid at call sites + and on function declarations and definitions. ``noduplicate`` This attribute indicates that calls to the function cannot be duplicated. A call to a ``noduplicate`` function may be moved |