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Diffstat (limited to 'docs/LangRef.rst')
| -rw-r--r-- | docs/LangRef.rst | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/docs/LangRef.rst b/docs/LangRef.rst index 6bf141e39c..965858c3f9 100644 --- a/docs/LangRef.rst +++ b/docs/LangRef.rst @@ -445,9 +445,13 @@ Global Variables ---------------- Global variables define regions of memory allocated at compilation time -instead of run-time. Global variables may optionally be initialized, may -have an explicit section to be placed in, and may have an optional -explicit alignment specified. +instead of run-time. + +Global variables definitions must be initialized, may have an explicit section +to be placed in, and may have an optional explicit alignment specified. + +Global variables in other translation units can also be declared, in which +case they don't have an initializer. A variable may be defined as ``thread_local``, which means that it will not be shared by threads (each thread will have a separated copy of the @@ -529,6 +533,12 @@ with an initializer, section, and alignment: @G = addrspace(5) constant float 1.0, section "foo", align 4 +The following example just declares a global variable + +.. code-block:: llvm + + @G = external global i32 + The following example defines a thread-local global with the ``initialexec`` TLS model: |