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| author | Eli Friedman <efriedma@codeaurora.org> | 2018-07-11 00:02:01 +0000 |
|---|---|---|
| committer | Eli Friedman <efriedma@codeaurora.org> | 2018-07-11 00:02:01 +0000 |
| commit | 18f882c8b84e9e3f25e3a0dc0898a0b25e66f79a (patch) | |
| tree | 6df9d94f0b7cdd1cdca14a376859ba3e989aea87 /llvm/docs | |
| parent | f3731d4e9c7d8201c27992d8990efaeaa7297b4c (diff) | |
| download | bcm5719-llvm-18f882c8b84e9e3f25e3a0dc0898a0b25e66f79a.tar.gz bcm5719-llvm-18f882c8b84e9e3f25e3a0dc0898a0b25e66f79a.zip | |
[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
Diffstat (limited to 'llvm/docs')
| -rw-r--r-- | llvm/docs/LangRef.rst | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/docs/LangRef.rst b/llvm/docs/LangRef.rst index 4e70bae3168..540265e6adc 100644 --- a/llvm/docs/LangRef.rst +++ b/llvm/docs/LangRef.rst @@ -7862,9 +7862,9 @@ memory is automatically released when the function returns. The '``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: """""""" |
