Hi Than,
I'm trying to build gollvm with different versions of llvm: LLVM8, 10, 11
and 13git. It looks like only 13git works.
-emit-llvm has some issues. The produced *.ll and *.bc LLVM bitcode can
only be opened with some of LLVM versions, and which version is quite
random to me.
Is there a manual on which version of LLVM should I build gollvm with and
which version is the bitcode that -emit-llvm produces?
Thanks,
Khanh
On Thursday, April 8, 2021 at 10:55:16 PM UTC+8 Khanh TN wrote:
> Thanks. Looks like I need everything, including llc at LLVM11. I will
> stick with LLVM11.
> I assume gollvm will match with whatever LLVM version is current, like,
> update to match LLVM12 when LLVM12 is out?
>
> Khanh
> On Thursday, April 8, 2021 at 10:40:19 PM UTC+8 th...@google.com wrote:
>
>> >It outputs a hello.ll file. LLVM11 can process it but 10.0.1 and 13git
>> cannot
>> >Would love to hear your feedback. Maybe I need the exact LLVM version
>> that gollvm is targeting?
>>
>> Yes, that is correct. The LLVM IR dump format (*.ll files) tends to
>> change over time and from release to release, it isn't intended or designed
>> to be stable.
>>
>> One way to insure that you have a conformant version of llc/lli (or
>> equivalent) is just to build then in the same build directory where you
>> built llvm.
>>
>> E.g. after "ninja gollvm" you can then try "ninja llc", then use the
>> freshly built llc binary (found in ./bin) for your work.
>>
>> Thanks, Than
>>
>>
>>
>> On Thu, Apr 8, 2021 at 10:00 AM Khanh TN <tnkh...@gmail.com> wrote:
>>
>>> Hi,
>>> Thanks for your reply.
>>> It's a bit weird.
>>> I tried LLVM10.0.1 and the LLVM13 built from github along with gollvm,
>>> both did not work.
>>> However, I just tried LLVM11 and it worked. I haven't tried LLVM12. It
>>> looks like different LLVM version has different syntax?
>>>
>>> The Go code I tried is simplest:
>>> I have 1 file hello.go:
>>>
>>> package main
>>> import(
>>> "fmt"
>>> )
>>>
>>> func main() {
>>> fmt.Println("Hello, playground")
>>> }
>>>
>>> As instructed in "How do I see the LLVM IR generated by gollvm?" on
>>> https://go.googlesource.com/gollvm , I ran
>>> > go build -work -x hello.go 1> transcript.txt 2>&1
>>> > egrep '(WORK=|llvm-goc -c)' transcript.txt
>>> WORK=/tmp/go-build903363323
>>> [...]
>>> > WORK=/tmp/go-build903363323
>>> >[..change output to -o hello.ll; add -S -emit-llvm]
>>>
>>> It outputs a hello.ll file. LLVM11 can process it but 10.0.1 and 13git
>>> cannot
>>> Would love to hear your feedback. Maybe I need the exact LLVM version
>>> that gollvm is targeting?
>>>
>>> Khanh
>>> On Thursday, April 8, 2021 at 7:07:13 PM UTC+8 th...@google.com wrote:
>>>
>>>> Hi,
>>>>
>>>> Can you be a bit more specific, e.g. what Go code you compiler and what
>>>> error you saw? It would also be helpful to know what version of lli/llc
>>>> you
>>>> were using.
>>>>
>>>> Thanks, Than
>>>>
>>>>
>>>> On Thu, Apr 8, 2021 at 2:33 AM Khanh TN <tnkh...@gmail.com> wrote:
>>>>
>>>>> Hi,
>>>>> I'm following this page https://go.googlesource.com/gollvm to compile
>>>>> Go code the LLVM way.
>>>>> I'm at the step "How do I see the LLVM IR generated by gollvm?" of the
>>>>> page. I'm doing exactly as the instruction. Gollvm produces a .ll file
>>>>> but
>>>>> the file has bad syntax. Running llvm-as (or llc, lli) on the generated
>>>>> .ll
>>>>> file gives error (I think its syntax error)
>>>>> Can anyone check this out?
>>>>>
>>>>> Thankss,
>>>>>
>>>>> Khanh
>>>>>
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