[llvm-dev] Question about LLVM backend

[Craig Topper via llvm-dev]

Hi Gaspard,

I think it is possible. There is a "UseIntegratedAssembler" variable in
llvm/include/llvm/MC/MCAsmInfo.h Several targets set it to false in the
constructors for their MCAsmInfo subclasses.

clang has a command line option -fno-integrated-as that can disable the use
of the integrated assembler.

There are at least 2 virtual functions in
clang/include/clang/Driver/ToolChain.h related to whether clang needs to
invoke a separate assembler by default.

  /// IsIntegratedAssemblerDefault - Does this tool chain enable
-integrated-as
  /// by default.
  virtual bool IsIntegratedAssemblerDefault() const { return false; }

  /// Check if the toolchain should use the integrated assembler.
  virtual bool useIntegratedAs() const;

I hope that helps or at least gives you some places to start looking.

~Craig


On Wed, Nov 24, 2021 at 10:30 AM via llvm-dev <llvm-dev at lists.llvm.org>
wrote:

> Hi everyone,
>
> first at all I would like to thanks llvm developers for their incredible
> jobs on llvm .
>
> I have a question , and I didn't find any answers.
>
> Is it possible to an llvm backend to only emit assembly code and not
> machine code ?
>
> I'm asking this question because I know the answer for gcc and for this
> compiler it's possible. In fact , gcc produces only assembly code.
>
>
> Is it possible to do so with llvm ?
>
> Thanks you in advance for your answers
>
>
> Gaspard
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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