[X86] Use new Flags argument to storeRegToStackSlot to simplify code. NFC (#124658)

Use the Flags argument to add FrameSetup directly instead of walking
backwards to add the flag after the call.

Author: topperc

llvm/lib/Target/X86/X86FrameLowering.cpp

@@ -3062,10 +3062,7 @@ bool X86FrameLowering::spillCalleeSavedRegisters(
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg, VT);
 
     TII.storeRegToStackSlot(MBB, MI, Reg, true, I.getFrameIdx(), RC, TRI,
-                            Register());
-    --MI;
-    MI->setFlag(MachineInstr::FrameSetup);
-    ++MI;
+                            Register(), MachineInstr::FrameSetup);
   }
 
   return true;

llvm/lib/Target/X86/X86InstrInfo.cpp

@@ -4801,7 +4801,8 @@ void X86InstrInfo::storeRegToStackSlot(
     loadStoreTileReg(MBB, MI, Opc, SrcReg, FrameIdx, isKill);
   else
     addFrameReference(BuildMI(MBB, MI, DebugLoc(), get(Opc)), FrameIdx)
-        .addReg(SrcReg, getKillRegState(isKill));
+        .addReg(SrcReg, getKillRegState(isKill))
+        .setMIFlag(Flags);
 }
 
 void X86InstrInfo::loadRegFromStackSlot(
@@ -4821,8 +4822,8 @@ void X86InstrInfo::loadRegFromStackSlot(
   if (isAMXOpcode(Opc))
     loadStoreTileReg(MBB, MI, Opc, DestReg, FrameIdx);
   else
-    addFrameReference(BuildMI(MBB, MI, DebugLoc(), get(Opc), DestReg),
-                      FrameIdx);
+    addFrameReference(BuildMI(MBB, MI, DebugLoc(), get(Opc), DestReg), FrameIdx)
+        .setMIFlag(Flags);
 }
 
 bool X86InstrInfo::analyzeCompare(const MachineInstr &MI, Register &SrcReg,