Re: [PATCH v1 6/6] LoongArch: ld: Add support for linker relaxation.

[Xi Ruoyao <xry111@xry111.site>]

On Mon, 2022-12-05 at 16:04 +0800, mengqinggang wrote:
> diff --git a/ld/testsuite/ld-loongarch-elf/relax.s b/ld/testsuite/ld-
> loongarch-elf/relax.s
> new file mode 100644
> index 00000000000..a99bd4de5af
> --- /dev/null
> +++ b/ld/testsuite/ld-loongarch-elf/relax.s
> @@ -0,0 +1,50 @@
> +# m.c: printf global int a, compile with gcc -fpic.
> +# la.local and la.global would be relaxed to pcaddi.

Remove things not needed for testing, such as the .cfi and .ident
directives.  Maybe it can be simplified to something like

.data
.global a
.type a, @object
a:
  .word 123

.text
.global main
.type main, @function
main:
  la.global $a0, a
  ld.w $a0, $a0, 0
  xori $a0, $a0, 123
  jr $ra

> +
> +       .file   "m.c"
> +       .text
> +       .globl  a
> +       .data
> +       .align  2
> +       .type   a, @object
> +       .size   a, 4
> +a:
> +       .word   123
> +       .section        .rodata
> +       .align  3
> +.LC0:
> +       .ascii  "%d\012\000"
> +       .text
> +       .align  2
> +       .globl  main
> +       .type   main, @function
> +main:
> +.LFB0 = .
> +       .cfi_startproc
> +       addi.d  $r3,$r3,-16
> +       .cfi_def_cfa_offset 16
> +       st.d    $r1,$r3,8
> +       stptr.d $r22,$r3,0
> +       .cfi_offset 1, -8
> +       .cfi_offset 22, -16
> +       addi.d  $r22,$r3,16
> +       .cfi_def_cfa 22, 0
> +       la.global       $r12,a
> +       ldptr.w $r12,$r12,0
> +       or      $r5,$r12,$r0
> +       la.local        $r4,.LC0
> +       #bl     %plt(printf)
> +       or      $r12,$r0,$r0
> +       or      $r4,$r12,$r0
> +       ld.d    $r1,$r3,8
> +       .cfi_restore 1
> +       ldptr.d $r22,$r3,0
> +       .cfi_restore 22
> +       addi.d  $r3,$r3,16
> +       .cfi_def_cfa_register 3
> +       jr      $r1
> +       .cfi_endproc
> +.LFE0:
> +       .size   main, .-main
> +       .ident  "GCC: (GNU) 13.0.0 20221023 (experimental)"
> +       .section        .note.GNU-stack,"",@progbits

-- 
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University