[PATCH] D29273: [ELF] - Added partial support for --emit-relocs (no --gc-section case)

[Rafael Avila de Espindola via llvm-commits]

> Index: test/ELF/linkerscript/emit-reloc-discard.s
> ===================================================================
> --- test/ELF/linkerscript/emit-reloc-discard.s
> +++ test/ELF/linkerscript/emit-reloc-discard.s
> @@ -0,0 +1,15 @@
> +# REQUIRES: x86
> +# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
> +# RUN: echo "SECTIONS { /DISCARD/ : { *(.debug*) } }" > %t.script
> +# RUN: ld.lld --emit-relocs --script %t.script %t.o -o %t1
> +# RUN: llvm-readobj -r %t1 | FileCheck %s
> +
> +# CHECK:      Relocations [
> +# CHECK-NEXT: ]
> +
> +.section .debug_str,"MS", at progbits,1
> +.Linfo_string0:
> +  .asciz "AAA"
> +
> +.section  .debug_info,"", at progbits
> +  .long .Linfo_string0

This is better handled along the followup patch that adds gc, no?

> Index: ELF/LinkerScript.cpp
> ===================================================================
> --- ELF/LinkerScript.cpp
> +++ ELF/LinkerScript.cpp
> @@ -262,6 +262,12 @@
>    for (InputSectionBase<ELFT> *S : V) {
>      S->Live = false;
>      reportDiscarded(S);
> +
> +    // If we discard a section, we also should discard a dependent section.
> +    InputSection<ELFT> *IS = dyn_cast<InputSection<ELFT>>(S);
> +    if (!IS || !IS->DependentSection || !IS->DependentSection->Live)
> +      continue;
> +    discard({IS->DependentSection});
>    }
>  }

And this.

Cheers,
Rafael