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[LangRef] State that a nocapture pointer cannot be returned

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This is a small patch stating that a nocapture pointer cannot be returned.

Discussed in D93189.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D94386
This commit is contained in:
Juneyoung Lee 2021-01-11 14:42:08 +09:00
parent 521d6a1785
commit 38ff89f219
1 changed files with 2 additions and 1 deletions
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docs/LangRef.rst
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@ -1193,7 +1193,8 @@ Currently, only the following parameter attributes are defined:
``nocapture``
This indicates that the callee does not make any copies of the
pointer that outlive the callee itself. This is not a valid
pointer that outlive the callee itself in any form such as a pointer stored
in the memory or as a return value. This is not a valid
attribute for return values. Addresses used in volatile operations
are considered to be captured.