[llvm] [M68k] Use getM68kMCRegisterClass accessor after MCRegisterClasses became relocation-free (PR #206945)

[Sylvestre Ledru via llvm-commits]

https://github.com/sylvestre created https://github.com/llvm/llvm-project/pull/206945



Regressed by 0b413b7d0f5a, #206753


Issue:

```
  /build/source/llvm/lib/Target/M68k/AsmParser/M68kAsmParser.cpp: In member function 'bool
  {anonymous}::M68kOperand::isPCIBD32() const':
  /build/source/llvm/lib/Target/M68k/AsmParser/M68kAsmParser.cpp:516:11: error:
  'M68kMCRegisterClasses' was not declared in this scope
    516 |           M68kMCRegisterClasses[M68k::XR32RegClassID].contains(MemOp.InnerReg));
        |           ^~~~~~~~~~~~~~~~~~~~~
```

>From 492e8e493f4132342d1b505dcccdab462e7c684b Mon Sep 17 00:00:00 2001
From: Sylvestre Ledru <sylvestre at debian.org>
Date: Wed, 1 Jul 2026 12:54:01 +0200
Subject: [PATCH] [M68k] Use getM68kMCRegisterClass accessor after
 MCRegisterClasses became relocation-free

egressed by 0b413b7d0f5a, #206753
---
 llvm/lib/Target/M68k/AsmParser/M68kAsmParser.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Target/M68k/AsmParser/M68kAsmParser.cpp b/llvm/lib/Target/M68k/AsmParser/M68kAsmParser.cpp
index ee19a7f058f94..f67fdf55c7fdb 100644
--- a/llvm/lib/Target/M68k/AsmParser/M68kAsmParser.cpp
+++ b/llvm/lib/Target/M68k/AsmParser/M68kAsmParser.cpp
@@ -513,11 +513,11 @@ bool M68kOperand::isPCIBD32() const {
          // If InnerReg is NoReg, this is essentially a PCD with larger
          // displacement.
          (!MemOp.InnerReg.isValid() ||
-          M68kMCRegisterClasses[M68k::XR32RegClassID].contains(MemOp.InnerReg));
+          getM68kMCRegisterClass(M68k::XR32RegClassID).contains(MemOp.InnerReg));
 }
 bool M68kOperand::isPCIBD16() const {
   return isPCIBD() &&
-         M68kMCRegisterClasses[M68k::XR16RegClassID].contains(MemOp.InnerReg);
+         getM68kMCRegisterClass(M68k::XR16RegClassID).contains(MemOp.InnerReg);
 }
 void M68kOperand::addPCIBDOperands(MCInst &Inst, unsigned N) const {
   M68kOperand::addExpr(Inst, MemOp.OuterDisp);