tree adbcd34a1371b68047d92bdc36415b9b4c27c1a3
parent 1508adb3d86d2854ed7a0240c3aa635a39dd5a8c
author Matthias Braun <matze@braunis.de> 1501205792 +0000
committer Arnold Schwaighofer <aschwaighofer@apple.com> 1501706540 -0700

ARMFrameLowering: Only set ExtraCSSpill for actually unused registers.

The code assumed that unclobbered/unspilled callee saved registers are
unused in the function. This is not true for callee saved registers that are
also used to pass parameters such as swiftself.

rdar://33401922

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309350 91177308-0d34-0410-b5e6-96231b3b80d8