Marcus Shawcroft writes:

> On 21 May 2015 at 17:49, Jiong Wang <jiong.wang@arm.com> wrote:
>
>> 2015-05-14  Jiong Wang  <jiong.wang@arm.com>
>> gcc/
>>   * config/aarch64/aarch64.c (aarch64_print_operand): Support tls_size.
>>   * config/aarch64/aarch64.md (tlsle): Choose proper instruction
>>   sequences.
>>   (tlsle_<mode>): New define_insn.
>>   (tlsle_movsym_<mode>): Ditto.
>>   * config/aarch64/constraints.md (Uta): New constraint.
>>   (Utb): Ditto.
>>   (Utc): Ditto.
>>   (Utd): Ditto.
>>
>> gcc/testsuite/
>>   * gcc.target/aarch64/tlsle.c: New test source.
>>   * gcc.target/aarch64/tlsle12.c: New testcase.
>>   * gcc.target/aarch64/tlsle24.c: New testcase.
>>   * gcc.target/aarch64/tlsle32.c: New testcase.
>>
>
>
>   case SYMBOL_TLSLE:
> -  asm_fprintf (asm_out_file, ":tprel_lo12_nc:");
> +  if (aarch64_tls_size <= 12)
> +    /* Make sure TLS offset fit into 12bit.  */
> +    asm_fprintf (asm_out_file, ":tprel_lo12:");
> +  else
> +    asm_fprintf (asm_out_file, ":tprel_lo12_nc:");
>    break;
>
> Use the existing classify_symbol mechanism we use throughout the
> aarch64 backend.  Specifically rename SYMBOL_TLSLE as SYMBOL_TLSLE24
> and introduce the 3 missing flavours then use the symbol
> classification to control behaviour such as this modifier selection.

Done.

classified TLS symbol into the following sub-types according to the value of tls size.

 SYMBOL_TLSLE12
 SYMBOL_TLSLE24
 SYMBOL_TLSLE32
 SYMBOL_TLSLE48

And On AArch64, instruction sequence for TLS LE under -mtls-size=32 will
utilize the relocation modifier "tprel_g0_nc" together with MOVK, it's
only supported in binutils since 2015-03-04 as PR gas/17843. So I
adjusted tlsle32.c to make it robust by detecting whether there is such
binutils support.

OK for trunk?

2015-08-19  Marcus Shawcroft  <marcus.shawcroft@arm.com>
            Jiong Wang  <jiong.wang@arm.com>
gcc/
  * config/aarch64/aarch64.c (initialize_aarch64_tls_size): Set default
  tls size for tiny, small, large memory model.
  (aarch64_load_symref_appropriately): Support new symbol types.
  (aarch64_expand_mov_immediate): Likewise.
  (aarch64_print_operand): Likewise.
  (aarch64_classify_tls_symbol): Likewise.
  * config/aarch64/aarch64-protos.h (aarch64_symbol_context): Likewise.
  (aarch64_symbol_type): Likewise.
  * config/aarch64/aarch64.md (tlsle): Deleted.
  (tlsle12_<mode>): New define_insn.
  (tlsle24_<mode>): Likewise.
  (tlsle32_<mode>): Likewise.
  (tlsle48_<mode>): Likewise.
  * doc/sourcebuild.texi (AArch64-specific attributes): Document
  "aarch64_tlsle32".

gcc/testsuite/
  * lib/target-supports.exp (check_effective_target_aarch64_tlsle32):
  New test directive.
  * gcc.target/aarch64/tlsle_1.x: New test source.
  * gcc.target/aarch64/tlsle12.c: New testcase.
  * gcc.target/aarch64/tlsle24.c: New testcase.
  * gcc.target/aarch64/tlsle32.c: New testcase.
-- 
Regards,
Jiong