[LLVMdev] JIT support for inline asm on Linux

Bendersky, Eli eli.bendersky at intel.com
Mon May 7 22:17:11 PDT 2012


> On 5/7/2012 12:21 AM, Bendersky, Eli wrote:
> <snip>
> >
> > MCJIT is functional in trunk (and the 3.1 branch). While it doesn't include all
> the features of the old JIT quite yet, it's complete enough to pass all of JIT's
> execution tests on Linux and Mac OS X (no Windows yet). As for directions
> on how to enable it, follow the path of the "use-mcjit" flag passed to lli (in
> tools/lli/lli.cpp).
> >
> 
> I tried to load my bitcode library using lli but it gave a new error now:
> 
> > $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



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