[lld][LoongArch] Relax TLS LE/GD/LD (#123600)

In local-exec form, the code sequence is converted as follows:
```
From:
  lu12i.w $rd, %le_hi20_r(sym)
    R_LARCH_TLS_LE_HI20_R, R_LARCH_RELAX
  add.w/d $rd, $rd, $tp, %le_add_r(sym)
    R_LARCH_TLS_LE_ADD_R, R_LARCH_RELAX
  addi/ld/st.w/d $rd, $rd, %le_lo12_r(sym)
    R_LARCH_TLS_LE_LO12_R, R_LARCH_RELAX
To:
  addi/ld/st.w/d $rd, $tp, %le_lo12_r(sym)
    R_LARCH_TLS_LE_LO12_R
``` 

In global-dynamic or local-dynamic, the code sequence is converted as
follows:
```
From:
  pcalau12i     $a0, %ld_pc_hi20(sym)  | %gd_pc_hi20(sym)
    R_LARCH_TLS_GD_PC_HI20 | R_LARCH_TLS_LD_PC_HI20, R_LARCH_RELAX
  addi.w/d $a0, $a0, %got_pc_lo12(sym) | %got_pc_lo12(sym)
    R_LARCH_GOT_PC_LO12, R_LARCH_RELAX
To:
  pcaddi        $a0, %got_pc_lo12(sym) | %got_pc_lo12(sym)
    R_LARCH_TLS_GD_PCREL20_S2 | R_LARCH_TLS_LD_PCREL20_S2
``` 
Note: For initial-exec form, since it involves the conversion from IE to
LE, we will implement it in a future patch.

0 files changed, 0 insertions, 0 deletions