[clang] [llvm] Delegate __builtin_setjmp SP and FP save to the backend on all targets (PR #186843)

[Matt Arsenault via cfe-commits]

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arsenm wrote:

```suggestion
BuildMI(*MBB, MI, DL, TII->get(VE::STrii))
.addReg(BufReg);
.addImm(0);
.addImm(16);
.addReg(VE::SX11);
.setMemRefs(MMOs);
```

https://github.com/llvm/llvm-project/pull/186843