[all-commits] [llvm/llvm-project] 799343: Relax TLS LE/GD/LD.

[Zhaoxin Yang via All-commits]

  Branch: refs/heads/users/ylzsx/r-tls-noie
  Home:   https://github.com/llvm/llvm-project
  Commit: 7993434e2973437b010034051003f8c03d8eff71
      https://github.com/llvm/llvm-project/commit/7993434e2973437b010034051003f8c03d8eff71
  Author: yangzhaoxin <yangzhaoxin at loongson.cn>
  Date:   2025-01-20 (Mon, 20 Jan 2025)

  Changed paths:
    M lld/ELF/Arch/LoongArch.cpp

  Log Message:
  -----------
  Relax TLS LE/GD/LD.

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.


  Commit: 1e9aa529f34dbe6d61295980593c894d3074a7b2
      https://github.com/llvm/llvm-project/commit/1e9aa529f34dbe6d61295980593c894d3074a7b2
  Author: yangzhaoxin <yangzhaoxin at loongson.cn>
  Date:   2025-01-20 (Mon, 20 Jan 2025)

  Changed paths:
    M lld/test/ELF/loongarch-tls-gd.s
    M lld/test/ELF/loongarch-tls-ld.s

  Log Message:
  -----------
  Add test for TLSLD/TLSGD when relax enabled.


  Commit: 91da25ea973556fc3a9f4dd2af06af0371cc4d36
      https://github.com/llvm/llvm-project/commit/91da25ea973556fc3a9f4dd2af06af0371cc4d36
  Author: yangzhaoxin <yangzhaoxin at loongson.cn>
  Date:   2025-01-20 (Mon, 20 Jan 2025)

  Changed paths:
    M lld/test/ELF/loongarch-tls-le.s

  Log Message:
  -----------
  Modify test for TLSLE when relax enabled.


  Commit: 2066c5f7cc3eecfdd76216378efbfb8376fa4262
      https://github.com/llvm/llvm-project/commit/2066c5f7cc3eecfdd76216378efbfb8376fa4262
  Author: yangzhaoxin <yangzhaoxin at loongson.cn>
  Date:   2025-01-20 (Mon, 20 Jan 2025)

  Changed paths:
    M lld/test/ELF/loongarch-relax-emit-relocs.s
    A lld/test/ELF/loongarch-relax-tls-le.s

  Log Message:
  -----------
  Add test for loongarch-relax-tls-le.s and modify loongarch-relax-emit-relocs.s


  Commit: b57c40e275dc0977e002e68834c2b40fa030d9fc
      https://github.com/llvm/llvm-project/commit/b57c40e275dc0977e002e68834c2b40fa030d9fc
  Author: yangzhaoxin <yangzhaoxin at loongson.cn>
  Date:   2025-01-20 (Mon, 20 Jan 2025)

  Changed paths:
    M lld/test/ELF/loongarch-relax-tls-le.s
    M lld/test/ELF/loongarch-tls-gd.s
    M lld/test/ELF/loongarch-tls-ld.s
    M lld/test/ELF/loongarch-tls-le.s

  Log Message:
  -----------
  Modify test. Add --relax option.


Compare: https://github.com/llvm/llvm-project/compare/7993434e2973%5E...b57c40e275dc

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