Chad Rosier 6d98655070 [AArch64] Break the dependency between FP and SP when possible.
When the SP in not changed because of realignment/VLAs etc., we restore the SP
by using the previous value of SP and not the FP. Breaking the dependency will
help in cases when the epilog of a callee is close to the epilog of the caller;
for then "sub sp, fp, #" depends on the load restoring the FP in the epilog of
the callee.

http://reviews.llvm.org/D18060
Patch by Aditya Kumar and Evandro Menezes.

llvm-svn: 263458
2016-03-14 18:17:41 +00:00
..
2015-02-13 10:48:30 +00:00
2015-08-11 14:35:29 +00:00
2014-08-20 10:40:20 +00:00