[lld] r273266 - Revert "Revert "Add a test showing that lto produces relaxable relocations.""

[Sean Silva via llvm-commits]

Thanks.

On Tue, Jun 21, 2016 at 7:47 AM, Rafael Espindola via llvm-commits <
llvm-commits at lists.llvm.org> wrote:

> Author: rafael
> Date: Tue Jun 21 09:47:43 2016
> New Revision: 273266
>
> URL: http://llvm.org/viewvc/llvm-project?rev=273266&view=rev
> Log:
> Revert "Revert "Add a test showing that lto produces relaxable
> relocations.""
>
> This reverts commit r273247.
>
> lld should always use the new relocations.
>
> Added:
>     lld/trunk/test/ELF/lto/relax-relocs.ll
> Modified:
>     lld/trunk/ELF/LTO.cpp
>
> Modified: lld/trunk/ELF/LTO.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/LTO.cpp?rev=273266&r1=273265&r2=273266&view=diff
>
> ==============================================================================
> --- lld/trunk/ELF/LTO.cpp (original)
> +++ lld/trunk/ELF/LTO.cpp Tue Jun 21 09:47:43 2016
> @@ -279,6 +279,10 @@ std::vector<std::unique_ptr<InputFile>>
>    if (!T)
>      fatal("target not found: " + Msg);
>    TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
> +
> +  // lld supports the new relocations.
> +  Options.RelaxELFRelocations = true;
> +
>    Reloc::Model R = Config->Pic ? Reloc::PIC_ : Reloc::Static;
>
>    auto CreateTargetMachine = [&]() {
>
> Added: lld/trunk/test/ELF/lto/relax-relocs.ll
> URL:
> http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/lto/relax-relocs.ll?rev=273266&view=auto
>
> ==============================================================================
> --- lld/trunk/test/ELF/lto/relax-relocs.ll (added)
> +++ lld/trunk/test/ELF/lto/relax-relocs.ll Tue Jun 21 09:47:43 2016
> @@ -0,0 +1,15 @@
> +; RUN: llvm-as %s -o %t.o
> +; RUN: ld.lld -m elf_x86_64 -save-temps -shared %t.o -o %t.so
> +; RUN: llvm-readobj -r %t.so.lto.o | FileCheck %s
> +
> +; Test that we produce R_X86_64_REX_GOTPCRELX instead of R_X86_64_GOTPCREL
> +; CHECK: R_X86_64_REX_GOTPCRELX foo
> +
> +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
> +target triple = "x86_64-unknown-linux-gnu"
> +
> + at foo = external global i32
> +define i32 @bar() {
> +  %t = load i32, i32* @foo
> +  ret i32 %t
> +}
>
>
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