llvm dev - Jan 2019 - I have a problem about "Writting an LLVM Backend"

I intend to write a new LLVM Backend for my new instruction set,but I notice
that the example in the document "Writing an LLVM Backend" is not
suitable
for up-to-date version"7.0.1".

 

That document is in "docs" directory of LLVM source of up-to-date
version
and LLVM Website.

 

For example,in section "Target Machine",in
"SparcTargetMachine.h",there is
"DataLayout","InstrInfo" as class members in class
"SparcTargetMachine" but
is not in "SparcTargetMachine.h" which is in "LLVM version
7.0.1",and the
argument list of the constructor is also different.

 

I don't know how to write a new LLVM Backend for me.Do you have new
documents suitable for up-to-date version?or,do you know what version of
LLVM is for that documents?

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You can find an almost [1] up to date set of patches used to create a
RISC-V backend from scratch at:

https://github.com/lowRISC/riscv-llvm

[1] hasn't been rebased for about 11 months.

On Sat, Jan 26, 2019 at 11:47 AM lizhirui via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
>
> I intend to write a new LLVM Backend for my new instruction set,but I
notice that the example in the document “Writing an LLVM Backend” is not
suitable for up-to-date version”7.0.1”.
>
>
>
> That document is in “docs” directory of LLVM source of up-to-date version
and LLVM Website.
>
>
>
> For example,in section “Target Machine”,in “SparcTargetMachine.h”,there is
“DataLayout”,”InstrInfo” as class members in class “SparcTargetMachine” but is
not in “SparcTargetMachine.h” which is in “LLVM version 7.0.1”,and the argument
list of the constructor is also different.
>
>
>
> I don’t know how to write a new LLVM Backend for me.Do you have new
documents suitable for up-to-date version?or,do you know what version of LLVM is
for that documents?
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev