[LangRef] Clarify alloca of zero bytes.
authorEli Friedman <efriedma@codeaurora.org>
Wed, 11 Jul 2018 00:02:01 +0000 (00:02 +0000)
committerEli Friedman <efriedma@codeaurora.org>
Wed, 11 Jul 2018 00:02:01 +0000 (00:02 +0000)
commit18f882c8b84e9e3f25e3a0dc0898a0b25e66f79a
tree6df9d94f0b7cdd1cdca14a376859ba3e989aea87
parentf3731d4e9c7d8201c27992d8990efaeaa7297b4c
[LangRef] Clarify alloca of zero bytes.

Let's be conservative here; it matches what we actually implemented, and
it should be rare in practice anyway.

Differential Revision: https://reviews.llvm.org/D49042

llvm-svn: 336744
llvm/docs/LangRef.rst