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[RISCV] Expand PseudoTAIL with t2 instead of t1 for Zicfilp. (#89014)
PseudoTail should be a software guarded branch in Ziciflp, since its branch target is known in link time. JALR/C.JR/C.JALR with rs1 as t2 is termed a software guarded branch. Such branches do not need to land on a lpad instruction. ABI Change PR: riscv-non-isa/riscv-asm-manual#93
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