Add to/from SR instr usage and SR uses/defs

[knickish]

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⚠️ C/C++ code formatter, clang-format found issues in your code. ⚠️

You can test this locally with the following command:

git-clang-format --diff ba58d35019ae40641ae454472a43965a7bee5696 221f07cbd954167460476f9b66a95a2db2011582 --extensions h,cpp -- llvm/lib/Target/M68k/M68kInstrInfo.cpp llvm/lib/Target/M68k/M68kSubtarget.h

View the diff from clang-format here.

diff --git a/llvm/lib/Target/M68k/M68kInstrInfo.cpp b/llvm/lib/Target/M68k/M68kInstrInfo.cpp
index e83f2a7d81..240a5394d5 100644
--- a/llvm/lib/Target/M68k/M68kInstrInfo.cpp
+++ b/llvm/lib/Target/M68k/M68kInstrInfo.cpp
@@ -760,7 +760,8 @@ void M68kInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
   bool ToCCR = DstReg == M68k::CCR;
   bool ToSR = DstReg == M68k::SR;
 
-  assert((FromCCR+FromSR+ToCCR+ToSR) <= 1 && "Copies may only touch one of either SR or CCR");
+  assert((FromCCR + FromSR + ToCCR + ToSR) <= 1 &&
+         "Copies may only touch one of either SR or CCR");
 
   if (FromCCR) {
     if (M68k::DR8RegClass.contains(DstReg)) {