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| author | Nick Lewycky <nicholas@mxc.ca> | 2009-05-10 20:57:05 +0000 |
|---|---|---|
| committer | Nick Lewycky <nicholas@mxc.ca> | 2009-05-10 20:57:05 +0000 |
| commit | b8f9b7a965756c532cbcd1ffdac05675fe65af39 (patch) | |
| tree | df8d0d1a8f45d9acfd6ce7ff3ab7851540fe0985 /llvm/docs | |
| parent | 9257b234a581024444b71382504f23671a453dbf (diff) | |
| download | bcm5719-llvm-b8f9b7a965756c532cbcd1ffdac05675fe65af39.tar.gz bcm5719-llvm-b8f9b7a965756c532cbcd1ffdac05675fe65af39.zip | |
Make MDNode use CallbackVH. Also change MDNode to store Value* instead of
Constant* in preperation of a future change to support holding non-Constants
in an MDNode.
llvm-svn: 71407
Diffstat (limited to 'llvm/docs')
| -rw-r--r-- | llvm/docs/LangRef.html | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/docs/LangRef.html b/llvm/docs/LangRef.html index 36eae718e35..3f16e386c2b 100644 --- a/llvm/docs/LangRef.html +++ b/llvm/docs/LangRef.html @@ -2061,6 +2061,10 @@ the two digit hex code. For example: "<tt>!"test\00"</tt>". exclamation point). For example: "<tt>!{ { } !"test\00", i32 10}</tt>". </p> +<p>A metadata node will attempt to track changes to the values it holds. In +the event that a value is deleted, it will be replaced with a typeless +"<tt>null</tt>", such as "<tt>{ } !{null, i32 0}</tt>".</p> + <p>Optimizations may rely on metadata to provide additional information about the program that isn't available in the instructions, or that isn't easily computable. Similarly, the code generator may expect a certain metadata format |
