llvm dev - May 2012 - [LLVMdev] JIT support for inline asm on Linux

On 5/7/2012 10:17 PM, Bendersky, Eli wrote:
<snip>
>>> $lli -entry-function="ISimEngine_GetVersion" -use-mcjit
libengine.bc
>>> LLVM ERROR: Inline asm not supported by this streamer because we
don't
>>> have an asm parser for this target
>>
>> I also tried other variations of the call with the same result:
>>> $lli -entry-function="ISimEngine_GetVersion" -use-mcjit
-mattr=+avx
>>> -mcpu=corei7-avx libengine.bc
>>
>> I updated my program looking at lli.cpp and it also gave the same error
as
>> above. The info from lli --version is below:
>>
>>> $lli --version
>>> LLVM (http://llvm.org/):
>>>    LLVM version 3.2svn
>>>    Optimized build with assertions.
>>>    Built May  7 2012 (10:54:43).
>>>    Default target: x86_64-unknown-linux-gnu
>>>    Host CPU: corei7-avx
>>
>> Any pointers? I saw another thread "Trouble using the MCJIT:
"Target does
>> not support MC emission" error" but that didnt seem to have
positive
>> ending.
>>
>
> Sorry, I'm not familiar with these parts (ASM parsing in MC). Perhaps
someone else could help here. I wonder, though, did you manage to get some code
running without inline ASM?
> Eli
I tried the attached program, compiled with clang and used lli to run it:
clang -cc1 -O0 -g -emit-llvm test.c
lli -use-mcjit test.ll

The lli prints out what looks like binary data. If I remove the inline 
asm from the program, it works fine.

TIA,
Ashok
-------------- next part --------------
//#include <stdio.h>

/*
void f(void)
{
}
*/

int main(void)
{
        int foo = 10, bar = 15;
        __asm__ __volatile__("addl  %%ebx,%%eax"
                             :"=a"(foo)
                             :"a"(foo), "b"(bar)
                             );
        //printf("foo+bar=%d\n", foo);
        return 0;
}

Resending, any pointers are much appreciated.

On 5/7/2012 11:16 PM, Ashok Nalkund wrote:
>
>
> On 5/7/2012 10:17 PM, Bendersky, Eli wrote:
> <snip>
>>>> $lli -entry-function="ISimEngine_GetVersion"
-use-mcjit libengine.bc
>>>> LLVM ERROR: Inline asm not supported by this streamer because
we don't
>>>> have an asm parser for this target
>>>
>>> I also tried other variations of the call with the same result:
>>>> $lli -entry-function="ISimEngine_GetVersion"
-use-mcjit -mattr=+avx
>>>> -mcpu=corei7-avx libengine.bc
>>>
>>> I updated my program looking at lli.cpp and it also gave the same
>>> error as
>>> above. The info from lli --version is below:
>>>
>>>> $lli --version
>>>> LLVM (http://llvm.org/):
>>>> LLVM version 3.2svn
>>>> Optimized build with assertions.
>>>> Built May 7 2012 (10:54:43).
>>>> Default target: x86_64-unknown-linux-gnu
>>>> Host CPU: corei7-avx
>>>
>>> Any pointers? I saw another thread "Trouble using the MCJIT:
"Target
>>> does
>>> not support MC emission" error" but that didnt seem to
have positive
>>> ending.
>>>
>>
>> Sorry, I'm not familiar with these parts (ASM parsing in MC).
Perhaps
>> someone else could help here. I wonder, though, did you manage to get
>> some code running without inline ASM?
>> Eli
>
> I tried the attached program, compiled with clang and used lli to run it:
> clang -cc1 -O0 -g -emit-llvm test.c
> lli -use-mcjit test.ll
>
> The lli prints out what looks like binary data. If I remove the inline
> asm from the program, it works fine.
>
> TIA,
> Ashok
>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

> >>>> $lli -entry-function="ISimEngine_GetVersion"
-use-mcjit libengine.bc
> >>>> LLVM ERROR: Inline asm not supported by this streamer
because we don't
> >>>> have an asm parser for this target
  You can see the error message comes from
lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp.

---
  OwningPtr<MCTargetAsmParser>
    TAP(TM.getTarget().createMCAsmParser(*STI, *Parser));
  if (!TAP)
    report_fatal_error("Inline asm not supported by this streamer
because"
                       " we don't have an asm parser for this
target\n");
---

  X86 has implemented X86AsmParser as MCTargetAsmParser's sub-class
(lib/Target/X86/AsmParser/X86AsmParser.cpp). Perhaps you just need
to let createMCAsmParser function return X86AsmParser.

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