[Bug target/52268] tls support should be added for darwin11

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52268

Iain Sandoe <iains at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-02-16
     Ever Confirmed|0                           |1

--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> 2012-02-16 18:53:33 
UTC ---
somewhat different from the output generated, for example for x86-64-unk-linux
(-fPIC).

.... this is what clang version 3.1 (trunk 150612) : gives.

$ cat ../tests/thr-0.c

int foo (int f)
{
static __thread int ff ;
  ff += f;
  return ff;
}

$ ./install/bin/clang ../tests/thr-0.c -target x86_64-apple-darwin11 -S 

$ more thr-0.s
        .section        __TEXT,__text,regular,pure_instructions
        .globl  _foo
        .align  4, 0x90
_foo:                                   ## @foo
        .cfi_startproc
## BB#0:                                ## %entry
        pushq   %rbp
Ltmp2:
        .cfi_def_cfa_offset 16
Ltmp3:
        .cfi_offset %rbp, -16
        movq    %rsp, %rbp
Ltmp4:
        .cfi_def_cfa_register %rbp
        subq    $16, %rsp
        movl    %edi, -4(%rbp)
        movl    %edi, -8(%rbp)          ## 4-byte Spill
        movq    _foo.ff@TLVP(%rip), %rdi
        callq   *(%rdi)
        movl    (%rax), %ecx
        movl    -8(%rbp), %edx          ## 4-byte Reload
        addl    %edx, %ecx
        movl    %ecx, (%rax)
        movl    %ecx, %eax
        addq    $16, %rsp
        popq    %rbp
        ret
        .cfi_endproc

.tbss _foo.ff$tlv$init, 4, 2            ## @foo.ff

        .section        __DATA,__thread_vars,thread_local_variables
_foo.ff:
        .quad   __tlv_bootstrap
        .quad   0
        .quad   _foo.ff$tlv$init


.subsections_via_symbols

=====

$ ./install/bin/clang ../tests/thr-0.c -target i686-apple-darwin11 -S

$ more thr-0.s
        .section        __TEXT,__text,regular,pure_instructions
        .globl  _foo
        .align  4, 0x90
_foo:                                   ## @foo
## BB#0:                                ## %entry
        pushl   %ebp
        movl    %esp, %ebp
        subl    $8, %esp
        calll   L0$pb
L0$pb:
        popl    %eax
        movl    8(%ebp), %ecx
        movl    %ecx, -4(%ebp)
        movl    _foo.ff@TLVP-L0$pb(%eax), %eax
        movl    %ecx, -8(%ebp)          ## 4-byte Spill
        calll   *(%eax)
        movl    (%eax), %ecx
        movl    -8(%ebp), %edx          ## 4-byte Reload
        addl    %edx, %ecx
        movl    %ecx, (%eax)
        movl    %ecx, %eax
        addl    $8, %esp
        popl    %ebp
        ret

.tbss _foo.ff$tlv$init, 4, 2            ## @foo.ff

        .section        __DATA,__thread_vars,thread_local_variables
_foo.ff:
        .long   __tlv_bootstrap
        .long   0
        .long   _foo.ff$tlv$init


.subsections_via_symbols

===

$ cat ../tests/thr-1.c

int foo (int f)
{
static __thread int ff = 1234;
  ff += f;
  return ff;
}


... much the same except

        popq    %rbp
        ret
        .cfi_endproc

        .section        __DATA,__thread_data,thread_local_regular
        .align  2                       ## @foo.ff
_foo.ff$tlv$init:
        .long   1234                    ## 0x4d2

        .section        __DATA,__thread_vars,thread_local_variables
_foo.ff:
        .quad   __tlv_bootstrap
        .quad   0
        .quad   _foo.ff$tlv$init

--- and
        popl    %ebp
        ret

        .section        __DATA,__thread_data,thread_local_regular
        .align  2                       ## @foo.ff
_foo.ff$tlv$init:
        .long   1234                    ## 0x4d2

        .section        __DATA,__thread_vars,thread_local_variables
_foo.ff:
        .long   __tlv_bootstrap
        .long   0
        .long   _foo.ff$tlv$init