[clang] [llvm] [Mips] Implement MipsInstrInfo::getNop() operation (PR #135524)

[Hervé Poussineau via llvm-commits]

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@@ -87,6 +87,14 @@ MipsInstrInfo::GetMemOperand(MachineBasicBlock &MBB, int FI,
                                  MFI.getObjectAlign(FI));
 }
 
+MCInst MipsInstrInfo::getNop() const {
+  MCInst Nop;
+  // using Mips::NOP gives
+  // "fatal error: error in backend: Not supported instr: <MCInst 580>"
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hpoussin wrote:

This patch is already an improvement, because it replaces a compiler crash by the use of a valid instruction (although deprecated in recent architectures).
However, you're right that it will be better to address this error and use Mips::NOP. Unfortunately, I think I won't be able to do it myself.

https://github.com/llvm/llvm-project/pull/135524