hi all,
I’m trying to write an LLVM-based interpreter for a small DSL that we have. The language is very simple (essentially a calculator), but I’d like it to execute efficiently. I’ve been following the tutorial, and have the following code for instantiating an ExecutionEngine:
#include <LLVM\ExecutionEngine\JIT.h>
#include <LLVM\ExecutionEngine\Interpreter.h>
// …
std::string builderErr;
llvm::EngineBuilder engineBuilder(&m_state.GetModule());
engineBuilder.setErrorStr(&builderErr);
m_engine = engineBuilder.create();
Unfortunately, i can’t seem to instantiate a JIT. I can get into the JIT::createJIT function, but i then fail to find an appropriate JIT for my architecture (which is actually X86_64-win64, via visual c++ compilation. I also had to fiddle around to get LLVM 2.9 to compile under the custom build system I’m working with). The JIT::selectTarget call infers a triple of “x86_64-pc-win32”, which then fails to find a target machine. Interestingly, the TargetRegistry appears to be empty, which doesn’t seem right (maybe i haven’t linked in a library that populates this?). I also tried specifying MCPU as “X86_64”/“X86” and MArch as “win64”/“w64”/“win32” using EngineBuilder functions, which didn’t help.
Can anyone tell me what the correct MArch/MCPU strings are for my machine, and why the current code is not able to infer it?
thanks
Nick
hi all,
I'm trying to write an LLVM-based interpreter for a small DSL that we
have. The language is very simple (essentially a calculator), but I'd
like it to execute efficiently. I've been following the tutorial, and
have the following code for instantiating an ExecutionEngine:
#include <LLVM\ExecutionEngine\JIT.h>
#include <LLVM\ExecutionEngine\Interpreter.h>
// ...
std::string builderErr;
llvm::EngineBuilder engineBuilder(&m_state.GetModule());
engineBuilder.setErrorStr(&builderErr);
m_engine = engineBuilder.create();
Unfortunately, i can't seem to instantiate a JIT. I can get into the
JIT::createJIT function, but i then fail to find an appropriate JIT for
my architecture (which is actually X86_64-win64, via visual c++
compilation. I also had to fiddle around to get LLVM 2.9 to compile
under the custom build system I'm working with). The JIT::selectTarget
call infers a triple of "x86_64-pc-win32", which then fails to find a
target machine. Interestingly, the TargetRegistry appears to be empty,
which doesn't seem right (maybe i haven't linked in a library that
populates this?). I also tried specifying MCPU as "X86_64"/"X86" and
MArch as "win64"/"w64"/"win32" using EngineBuilder functions, which
didn't help.
Did you link to the libraries that live in lib\Target\X86? Specifically,
you need LLVMX86Info, which populates the TargetRegistry with the x86
and x86_64 targets. You should also link to LLVMX86AsmPrinter,
LLVMX86CodeGen and LLVMX86Utils.
Can anyone tell me what the correct MArch/MCPU strings are for my
machine, and why the current code is not able to infer it?
x86_64 should be the right mcpu.
Chip