This adds support for the 'ls64' AArch64 extension to the `.arch_extension`
asm directive.
Reviewed By: ostannard
Differential Revision: https://reviews.llvm.org/D92574
AArch64 does not support enabling rcpc via .arch_extension in assembly.
GCC, on the other hand, does.
This patch adds 'rcpc' as a valid value to .arch_extension handling.
Differential Revision: https://reviews.llvm.org/D83685
This patch fixes .arch_extension directive parsing to handle a wider
range of architecture extension options. The existing parser was parsing
extensions as an identifier which breaks for extensions containing a
"-", such as the "tlb-rmi" extension.
The extension is now parsed as a string. This is consistent with the
extension parsing in the .arch and .cpu directive parsing.
Patch by Cullen Rhodes (c-rhodes)
Reviewed By: SjoerdMeijer
Differential Revision: https://reviews.llvm.org/D60118
llvm-svn: 357677
Mark Murray