diff options
| author | Michael Kuperstein <mkuper@google.com> | 2016-12-12 19:11:39 +0000 |
|---|---|---|
| committer | Michael Kuperstein <mkuper@google.com> | 2016-12-12 19:11:39 +0000 |
| commit | d3c66fe68443ed9b451f2f54f1fae8ef313bf8e3 (patch) | |
| tree | 6e31c4dbe62963972c488d2db68ccd4c200a4f2e /docs | |
| parent | 4404557edb3cbaaa20f755e9eeb8ffacbf5af457 (diff) | |
Bring back note about not supporting global register variables.
This was accidentally removed in r260506, even though we only support
non-allocatable global register variables. The general (allocatable) case
is explicitly not supported.
Differential Revision: https://reviews.llvm.org/D27473
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@289455 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/UsersManual.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/UsersManual.rst b/docs/UsersManual.rst index 26c8521680..96b7ac95cb 100644 --- a/docs/UsersManual.rst +++ b/docs/UsersManual.rst @@ -1830,6 +1830,10 @@ extensions are not implemented yet: ... local_function(1); +- clang only supports global register variables when the register specified + is non-allocatable (e.g. the stack pointer). Support for general global + register variables is unlikely to be implemented soon because it requires + additional LLVM backend support. - clang does not support static initialization of flexible array members. This appears to be a rarely used extension, but could be implemented pending user demand. |