[PATCH v1 0/6] LoongArch linker relaxation support.

[mengqinggang]

There are two instrunction sequence can be relaxed in LoongArch. The first one  
is "pcala12i + addi.d" which can be relaxed to pcaddi. Another one is           
"pcalau12i + ld.d" which can be relaxed to "pcalau12i + addi.d". And it can be  
relaxed to pcaddi one more time. Pcaddi instrunction can address a signed 22       
bits 4-byte alinged offset relative to pc. 

Now, only the instrunctions expand from macro (la.local, la.got, etc.) at          
assembly time can be relaxed, because gcc instruction scheduling causes relax   
unable to handle some special cases. Gcc can add -mno-explicit-relocs option       
to generate macro instrunction.

mengqinggang (6):
  LoongArch: include: Add support for linker relaxation.
  LoongArch: bfd: Add support for linker relaxation.
  LoongArch: opcodes: Add support for linker relaxation.
  LoongArch: binutils: Add support for linker relaxation.
  LoongArch: gas: Add support for linker relaxation.
  LoongArch: ld: Add support for linker relaxation.

 bfd/bfd-in2.h                                 |   8 +
 bfd/elfnn-loongarch.c                         | 582 +++++++++++++--
 bfd/elfxx-loongarch.c                         | 676 +++++++++++++-----
 bfd/elfxx-loongarch.h                         |  10 +-
 bfd/libbfd.h                                  |   8 +
 bfd/reloc.c                                   |  22 +
 binutils/readelf.c                            |  84 ++-
 binutils/testsuite/binutils-all/readelf.exp   |  13 +-
 gas/config/tc-loongarch.c                     | 412 +++++++++--
 gas/config/tc-loongarch.h                     |  45 +-
 gas/testsuite/gas/all/align.d                 |   5 +-
 gas/testsuite/gas/all/gas.exp                 |  10 +-
 gas/testsuite/gas/all/relax.d                 |   4 +
 gas/testsuite/gas/elf/dwarf-5-irp.d           |   3 +-
 gas/testsuite/gas/elf/dwarf-5-loc0.d          |   3 +-
 gas/testsuite/gas/elf/dwarf2-11.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-15.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-16.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-17.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-18.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-19.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-5.d              |   3 +-
 gas/testsuite/gas/elf/ehopt0.d                |   3 +
 gas/testsuite/gas/elf/elf.exp                 |   3 +
 gas/testsuite/gas/elf/section11.d             |   4 +-
 gas/testsuite/gas/lns/lns.exp                 |   1 +
 gas/testsuite/gas/loongarch/jmp_op.d          |  65 +-
 gas/testsuite/gas/loongarch/li.d              |   9 +-
 gas/testsuite/gas/loongarch/macro_op.d        |  69 +-
 .../gas/loongarch/macro_op_large_abs.d        | 103 +--
 .../gas/loongarch/macro_op_large_pc.d         | 103 +--
 gas/testsuite/gas/loongarch/relax_align.d     |  25 +
 gas/testsuite/gas/loongarch/relax_align.s     |   5 +
 gas/testsuite/gas/loongarch/uleb128.d         |  35 +
 gas/testsuite/gas/loongarch/uleb128.s         |  20 +
 include/elf/loongarch.h                       |  20 +
 include/opcode/loongarch.h                    |   3 +
 ld/emultempl/loongarchelf.em                  |   3 +
 ld/testsuite/ld-elf/compressed1d.d            |   3 +
 ld/testsuite/ld-elf/pr26936.d                 |   4 +-
 ld/testsuite/ld-loongarch-elf/disas-jirl.d    |   4 +-
 ld/testsuite/ld-loongarch-elf/jmp_op.d        |  65 +-
 ld/testsuite/ld-loongarch-elf/macro_op.d      | 138 ++--
 ld/testsuite/ld-loongarch-elf/relax-align.dd  |   7 +
 ld/testsuite/ld-loongarch-elf/relax-align.s   |   9 +
 ld/testsuite/ld-loongarch-elf/relax.dd        |   5 +
 ld/testsuite/ld-loongarch-elf/relax.exp       |  65 ++
 ld/testsuite/ld-loongarch-elf/relax.s         |  50 ++
 ld/testsuite/ld-loongarch-elf/uleb128.dd      |  10 +
 ld/testsuite/ld-loongarch-elf/uleb128.s       |  21 +
 opcodes/loongarch-opc.c                       |   5 +-
 51 files changed, 2223 insertions(+), 540 deletions(-)
 create mode 100644 gas/testsuite/gas/loongarch/relax_align.d
 create mode 100644 gas/testsuite/gas/loongarch/relax_align.s
 create mode 100644 gas/testsuite/gas/loongarch/uleb128.d
 create mode 100644 gas/testsuite/gas/loongarch/uleb128.s
 create mode 100644 ld/testsuite/ld-loongarch-elf/relax-align.dd
 create mode 100644 ld/testsuite/ld-loongarch-elf/relax-align.s
 create mode 100644 ld/testsuite/ld-loongarch-elf/relax.dd
 create mode 100644 ld/testsuite/ld-loongarch-elf/relax.exp
 create mode 100644 ld/testsuite/ld-loongarch-elf/relax.s
 create mode 100644 ld/testsuite/ld-loongarch-elf/uleb128.dd
 create mode 100644 ld/testsuite/ld-loongarch-elf/uleb128.s

-- 
2.36.0