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| author | Chris Lattner <sabre@nondot.org> | 2010-01-09 19:15:14 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-01-09 19:15:14 +0000 |
| commit | 873187c0426e069e92da3b644133059a8ee3948e (patch) | |
| tree | 5f13dd383afad8edc01ac63f137ff0b0d69c6385 /docs | |
| parent | a77169dbeb250d1992938650084dc799472fb956 (diff) | |
| download | llvm-873187c0426e069e92da3b644133059a8ee3948e.tar.gz llvm-873187c0426e069e92da3b644133059a8ee3948e.tar.bz2 llvm-873187c0426e069e92da3b644133059a8ee3948e.tar.xz | |
improve documentation for linkonce to be less confusing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93066 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/LangRef.html | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index 9c6a6d91e6..6315993fdf 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -558,10 +558,17 @@ define i32 @main() { <i>; i32()* </i> <dt><tt><b><a name="linkage_linkonce">linkonce</a></b></tt></dt> <dd>Globals with "<tt>linkonce</tt>" linkage are merged with other globals of - the same name when linkage occurs. This is typically used to implement - inline functions, templates, or other code which must be generated in each - translation unit that uses it. Unreferenced <tt>linkonce</tt> globals are - allowed to be discarded.</dd> + the same name when linkage occurs. This can be used to implement + some forms of inline functions, templates, or other code which must be + generated in each translation unit that uses it, but where the body may + be overridden with a more definitive definition later. Unreferenced + <tt>linkonce</tt> globals are allowed to be discarded. Note that + <tt>linkonce</tt> linkage does not actually allow the optimizer to + inline the body of this function into callers because it doesn't know if + this definition of the function is the definitive definition within the + program or whether it will be overridden by a stronger definition. + To enable inlining and other optimizations, use "<tt>linkonce_odr</tt>" + linkage.</dd> <dt><tt><b><a name="linkage_weak">weak</a></b></tt></dt> <dd>"<tt>weak</tt>" linkage has the same merging semantics as |