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Made it more explicit that the self-referential llvm.loop identifier metadata

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should be unique for each loop.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175888 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Pekka Jaaskelainen 2013-02-22 12:03:07 +00:00
parent 890dc92680
commit 45b2c25efb
1 changed files with 7 additions and 1 deletions
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docs/LangRef.rst
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@ -2537,11 +2537,17 @@ guaranteed to be separate for each loop. The loop-level metadata is prefixed
with ``llvm.loop``.
The loop identifier metadata is implemented using a metadata that refers to
itself as follows:
itself to avoid merging it with any other identifier metadata, e.g.,
during module linkage or function inlining. That is, each loop should refer
to their own identification metadata even if they reside in separate functions.
The following example contains loop identifier metadata for two separate loop
constructs:
.. code-block:: llvm
!0 = metadata !{ metadata !0 }
!1 = metadata !{ metadata !1 }
'``llvm.loop.parallel``' Metadata
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^