llvm dev - Oct 2012 - [LLVMdev] Here need your help

Hi all

    when i compiled  llvm-3.0 with icedtea1.11.4 together,A memory_barrier error
happened ,And now I write to all of you for the following questions need your
help and suggestion :
    1, Is any function which can replace the "make_function" in the
following function,
    2 , Or is there any  different paramters in make_function with the similar
action with the following one
    3 ,Is there a function similar with "nop" which can return a
address in LLVM or Shark ,

 Value* SharkBuilder::memory_barrier() {
      return make_function(
#if defined(ARM)
            (address) 0xffff0fa0, // __kernel_dmb
 #else
               "llvm.memory.barrier",
 #endif // ARM
     "11111", "v");
 }

what's more the Dir of the function is
:/openjdk-ecj/hotspot/src/share/vm/shark/sharkBuild.cpp

Thank you very much and looking forward to your reply

BR//Amiko
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Hi Liu,
>     when i compiled  llvm-3.0 with icedtea1.11.4 together,A memory_barrier
> error happened ,And now I write to all of you for the following questions
need
> your help and suggestion :
>     1, Is any function which can replace the "make_function" in
the following
> function,
>     2 , Or is there any  different paramters in make_function with the
similar
> action with the following one
>     3 ,Is there a function similar with "nop" which can return a
address in
> LLVM or Shark ,
> 
>  Value* SharkBuilder::memory_barrier() {
>       return make_function(
> #if defined(ARM)
>             (address) 0xffff0fa0, // __kernel_dmb
>  #else
>                "llvm.memory.barrier",
>  #endif // ARM
>      "11111", "v");
>  }
   You said you have "memory_barrier" error, what exact the error
message is? Your poposed solution is not relevant to the
"memory_barrier" error, but this is just my opinion. I think you
should
post "memory_barrier" error here so that others can give you a better
guess.

HTH,
chenwj

-- 
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj

On Tue, Oct 23, 2012 at 12:38 AM, liu chao jun <amiko212 at 126.com>
wrote:
>  Hi all
>
>     when i compiled  llvm-3.0 with icedtea1.11.4 together,A memory_barrier
> error happened ,And now I write to all of you for the following questions
> need your help and suggestion :
>     1, Is any function which can replace the "make_function" in
the
> following function,
>     2 , Or is there any  different paramters in make_function with the
> similar action with the following one
>     3 ,Is there a function similar with "nop" which can return a
address in
> LLVM or Shark ,
>
>  Value* SharkBuilder::memory_barrier() {
>       return make_function(
> #if defined(ARM)
>             (address) 0xffff0fa0, // __kernel_dmb
>  #else
>                "llvm.memory.barrier",
>  #endif // ARM
>      "11111", "v");
>  }
In newer versions of LLVM, llvm.memory.barrier has been replaced by
new atomic instructions; you're probably interested in the "fence"
instruction in particular.  See
http://llvm.org/docs/LangRef.html#i_fence

-Eli

Hi,

I'm afraid you may have asked your question on the wrong list.
"make_function" does not appear in the LLVM source, so it's almost
certainly part of icedtea. Because of that, the LLVM-specific answers
to your questions will probably not be that useful. However:
>     1, Is any function which can replace the "make_function" in
the
> following function,
Not in LLVM. It looks like our closest equivalent is a "fence"
instruction. It could probably do what you want with the correct
arguments (a "fence seq_cst" covers all barriers I can bring to mind),
but the details of what's needed are likely buried in your non-LLVM
code.
>     2 , Or is there any  different paramters in make_function with the
> similar action with the following one
Haven't the foggiest.
>     3 ,Is there a function similar with "nop" which can return a
address in
> LLVM or Shark ,
This sounds dodgy to me. If you really wanted to you could just return
an "undef" pointer (or 0 as a valid LLVM Value). But barriers are
there for a reason, and presumably something will try to use the
pointer you're returning so an invalid one may well be spectacularly
unhelpful.

It all comes down to icedtea again.

Tim.

Hi all
        A new bug is happend when I work  on the icedtea1-11.4 against LLVM3.0
,I Compiler the twos with below command line

LLVM-3.0:
./configure --enable-shared
make
make install
And final get a LLVM3.0.so
shark:
./configure --enable-zero --enable-shark --with_jdk_home=/home/j2sdk-image
make hotspot 
And final get a libjvm.so
However when run a  java -version the fllowing the error happed
Error while creating Shark JIT: Unable to find target for this triple (no
targets are registered)

I have no idea how to register the shark JIT into my build ,can not add
--enable-shark is ok  ,is any body know how to deal with it. Thank you very much
,And looking forward to your reply ,and it is great helpful with my job ,

thanks again

ps my plateform is : MIPS based



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