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| author | Nico Rieck <nico.rieck@gmail.com> | 2014-01-14 15:22:47 +0000 |
|---|---|---|
| committer | Nico Rieck <nico.rieck@gmail.com> | 2014-01-14 15:22:47 +0000 |
| commit | 38f68c5a2e3993a3ae51421d82e57ccca8f6ec38 (patch) | |
| tree | 33b1f01682f8443c419396a7368769dbcb4d1a3f /docs/BitCodeFormat.rst | |
| parent | d05a6582daf7af4142c91576739d4a780d4a30c8 (diff) | |
Decouple dllexport/dllimport from linkage
Representing dllexport/dllimport as distinct linkage types prevents using
these attributes on templates and inline functions.
Instead of introducing further mixed linkage types to include linkonce and
weak ODR, the old import/export linkage types are replaced with a new
separate visibility-like specifier:
define available_externally dllimport void @f() {}
@Var = dllexport global i32 1, align 4
Linkage for dllexported globals and functions is now equal to their linkage
without dllexport. Imported globals and functions must be either
declarations with external linkage, or definitions with
AvailableExternallyLinkage.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199218 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/BitCodeFormat.rst')
| -rw-r--r-- | docs/BitCodeFormat.rst | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/docs/BitCodeFormat.rst b/docs/BitCodeFormat.rst index 89531dcfea69..9363a62d0806 100644 --- a/docs/BitCodeFormat.rst +++ b/docs/BitCodeFormat.rst @@ -658,7 +658,7 @@ for each library name referenced. MODULE_CODE_GLOBALVAR Record ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -``[GLOBALVAR, pointer type, isconst, initid, linkage, alignment, section, visibility, threadlocal, unnamed_addr]`` +``[GLOBALVAR, pointer type, isconst, initid, linkage, alignment, section, visibility, threadlocal, unnamed_addr, dllstorageclass]`` The ``GLOBALVAR`` record (code 7) marks the declaration or definition of a global variable. The operand fields are: @@ -713,12 +713,20 @@ global variable. The operand fields are: * *unnamed_addr*: If present and non-zero, indicates that the variable has ``unnamed_addr`` +.. _dllstorageclass: + +* *dllstorageclass*: If present, an encoding of the DLL storage class of this variable: + + * ``default``: code 0 + * ``dllimport``: code 1 + * ``dllexport``: code 2 + .. _FUNCTION: MODULE_CODE_FUNCTION Record ^^^^^^^^^^^^^^^^^^^^^^^^^^^ -``[FUNCTION, type, callingconv, isproto, linkage, paramattr, alignment, section, visibility, gc, prefix]`` +``[FUNCTION, type, callingconv, isproto, linkage, paramattr, alignment, section, visibility, gc, prefix, dllstorageclass]`` The ``FUNCTION`` record (code 8) marks the declaration or definition of a function. The operand fields are: @@ -762,10 +770,12 @@ function. The operand fields are: * *prefix*: If non-zero, the value index of the prefix data for this function, plus 1. +* *dllstorageclass*: An encoding of the `dllstorageclass`_ of this function + MODULE_CODE_ALIAS Record ^^^^^^^^^^^^^^^^^^^^^^^^ -``[ALIAS, alias type, aliasee val#, linkage, visibility]`` +``[ALIAS, alias type, aliasee val#, linkage, visibility, dllstorageclass]`` The ``ALIAS`` record (code 9) marks the definition of an alias. The operand fields are @@ -778,6 +788,8 @@ fields are * *visibility*: If present, an encoding of the `visibility`_ of the alias +* *dllstorageclass*: If present, an encoding of the `dllstorageclass`_ of the alias + MODULE_CODE_PURGEVALS Record ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |