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Author SHA1 Message Date
Akira Hatanaka 3fb33a5d18 [ARM] Pass subtarget feature "+long-calls" instead of passing backend option 
"-arm-long-calls".

This change allows using -mlong-calls/-mno-long-calls for LTO and enabling or
disabling long call on a per-function basis.

rdar://problem/21529937

Differential Revision: http://reviews.llvm.org/D9414

llvm-svn: 241565
 2015-07-07 06:42:05 +00:00
Saleem Abdulrasool df903939c9 Driver: correct the backend option spelling 
The backend option does not have an '-enable' prefix.

llvm-svn: 211177
 2014-06-18 16:52:24 +00:00
Saleem Abdulrasool aea65e9b13 Driver: add -m{,no-}long-calls support 
This mirrors the GCC option for the ARM backend.  This option enables the
backend option "-enable-arm-long-calls".  The default behaviour is that this is
disabled due to the slight overhead of the generated calls.

If the target of jumps are greater than 64M range of offset-based jumps, then
the target address must be loaded into a register to make an indirect jump.  The
backend support for this has been present, but was not previously controllable
by the proper flag.

llvm-svn: 210398
 2014-06-07 19:32:38 +00:00