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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 | cb33799b9f4e152e3460faa83e59b53ff604c87d (patch) | |
| tree | dd87d965d590665a7ebdb4f4939b364364fe5e18 /docs/LangRef.html | |
| parent | af3fdb5dc4edf052ee4a3a169250fc3be304d1a7 (diff) | |
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71407 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/LangRef.html')
| -rw-r--r-- | docs/LangRef.html | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index 36eae718e3..3f16e386c2 100644 --- a/docs/LangRef.html +++ b/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 |