[all-commits] [llvm/llvm-project] 6c54ab: [lld][LoongArch] Relax R_LARCH_{PCALA, GOT_PC}_{HI2...

[Zhaoxin Yang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6c54ab548fa6d1b6d84864a93dbc436dc47c64b0
      https://github.com/llvm/llvm-project/commit/6c54ab548fa6d1b6d84864a93dbc436dc47c64b0
  Author: Zhaoxin Yang <yangzhaoxin at loongson.cn>
  Date:   2025-02-15 (Sat, 15 Feb 2025)

  Changed paths:
    M lld/ELF/Arch/LoongArch.cpp
    M lld/test/ELF/loongarch-relax-align.s
    M lld/test/ELF/loongarch-relax-emit-relocs.s
    A lld/test/ELF/loongarch-relax-pc-hi20-lo12-got-symbols.s
    A lld/test/ELF/loongarch-relax-pc-hi20-lo12.s

  Log Message:
  -----------
  [lld][LoongArch] Relax R_LARCH_{PCALA,GOT_PC}_{HI20,LO12} (#123566)

Support relaxation optimization for two types of code sequences.
```
From:
   pcalau12i $a0, %pc_hi20(sym)
       R_LARCH_PCALA_HI20, R_LARCH_RELAX
   addi.w/d $a0, $a0, %pc_lo12(sym)
       R_LARCH_PCALA_LO12, R_LARCH_RELAX
To:
   pcaddi $a0, %pc_lo12(sym)
       R_LARCH_PCREL20_S2
    
From:
   pcalau12i $a0, %got_pc_hi20(sym_got)
       R_LARCH_GOT_PC_HI20, R_LARCH_RELAX
   ld.w/d $a0, $a0, %got_pc_lo12(sym_got)
       R_LARCH_GOT_PC_LO12, R_LARCH_RELAX
To:
   pcaddi $a0, %got_pc_hi20(sym_got)
       R_LARCH_PCREL20_S2
```
Others:
- `loongarch-relax-pc-hi20-lo12-got-symbols.s` is inspired by
`aarch64-adrp-ldr-got-symbols.s`.

Co-authored-by: Xin Wang
[wangxin03 at loongson.cn](mailto:wangxin03 at loongson.cn)



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