[llvm] [TargetInstrInfo] enable foldMemoryOperand for InlineAsm (PR #70743)

[via llvm-commits]

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@@ -565,6 +565,64 @@ static MachineInstr *foldPatchpoint(MachineFunction &MF, MachineInstr &MI,
   return NewMI;
 }
 
+static void foldInlineAsmMemOperand(MachineInstr *MI, unsigned OpNo, int FI,
+                                    const TargetInstrInfo &TII) {
+  MachineOperand &MO = MI->getOperand(OpNo);
+  const VirtRegInfo &RI = AnalyzeVirtRegInBundle(*MI, MO.getReg());
+
+  // If the machine operand is tied, untie it first.
+  if (MO.isTied()) {
+    unsigned TiedTo = MI->findTiedOperandIdx(OpNo);
+    MI->untieRegOperand(OpNo);
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qcolombet wrote:

Note: A safe temporary solution could be to disallow the folding (i.e., use the `m` variant only) for tied operands.

https://github.com/llvm/llvm-project/pull/70743