Gas: Any pseudo instruction to disable a single RELOC?

[YunQiang Su]

>
> For this purpose GAS already supports the nal alias for bltzal $r0, 0.
>

Yes. I tried it first, and the performance of it is soooo bad.
The attached test case on Loongson 3A:

classic-MIPS-PIC          NAL-PIC                    BAL-PIC
1.5s                               18s (eighteen)           5s
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