[PATCH] D49042: [LangRef] Clarify alloca of zero bytes.

[Eli Friedman via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL336744: [LangRef] Clarify alloca of zero bytes. (authored by efriedma, committed by ).

Changed prior to commit:
  https://reviews.llvm.org/D49042?vs=154451&id=154905#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D49042

Files:
  llvm/trunk/docs/LangRef.rst


Index: llvm/trunk/docs/LangRef.rst
===================================================================
--- llvm/trunk/docs/LangRef.rst
+++ llvm/trunk/docs/LangRef.rst
@@ -7862,9 +7862,9 @@
 '``alloca``' instruction is commonly used to represent automatic
 variables that must have an address available. When the function returns
 (either with the ``ret`` or ``resume`` instructions), the memory is
-reclaimed. Allocating zero bytes is legal, but the result is undefined.
-The order in which memory is allocated (ie., which way the stack grows)
-is not specified.
+reclaimed. Allocating zero bytes is legal, but the returned pointer may not
+be unique. The order in which memory is allocated (ie., which way the stack
+grows) is not specified.
 
 Example:
 """"""""


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