I tried to compile helloworld program using llcj to native but i got the
following error
shyam at shyam:~$ cat hello.javaclass hello {
public static final String str = "Hello Word";
public static void main(String[] args) { System.out.println(str); }}shyam
at shyam:~$ llcj --main=hello hello.class -o hellollc: Unknown command line
argument '-f'. Try:
'/home/shyam/llvmbuild/Release+Debug+Asserts/bin/llc -help'llc: Did you
mean '-O'?
I edited the vmkit/tools/llcj/llcj.cpp file
line number ---- code188 const char* llcArgv[8];189 int i = 0;190
llcArgv[i++] = Prog.c_str();191 llcArgv[i++] = Out.c_str();192 if (shared)
llcArgv[i++] = "-relocation-model=pic";193 llcArgv[i++] =
"-disable-fp-elim";194 // llcArgv[i++] = "-f";
//Commented this line as there is no "-f" option for llc195
llcArgv[i++] = "-o";196 llcArgv[i++] = LlcOut.c_str();197
llcArgv[i++] = 0;
and i added few more lines of code to print the commands being executed inside
llcj.cpp
shyam at shyam:~$ llcj --main=hello hello.class -o hello
vmjc /home/shyam/classpath-0.97.2/lib/vmkit/Release+Debug+Asserts/bin/vmjc
--main=hello hello.class -f -o /tmp/llvm_WbIrdX/hello.bc
llc /home/shyam/llvmbuild/Release+Debug+Asserts/bin/llc
/tmp/llvm_WbIrdX/hello.bc -disable-fp-elim -o /tmp/llvm_WbIrdX/hello.s (null)
unsupported GC: vmkitUNREACHABLE executed at
/home/shyam/llvm-3.1.src/lib/CodeGen/GCMetadata.cpp:99!0 llc 0x08c83b58Stack
dump:0. Program arguments: /home/shyam/llvmbuild/Release+Debug+Asserts/bin/llc
/tmp/llvm_WbIrdX/hello.bc -disable-fp-elim -o /tmp/llvm_WbIrdX/hello.s 1.
Running pass 'Function Pass Manager' on module
'/tmp/llvm_WbIrdX/hello.bc'.
After observing the makefile of vmkit/tools/precompiler/trainer/Makefile i added
the code to load the shared library StaticGCPrinter.so
shyam at shyam:~$ llcj --main=hello hello.class -o hello
vmjc /home/shyam/classpath-0.97.2/lib/vmkit/Release+Debug+Asserts/bin/vmjc
--main=hello hello.class -f -o /tmp/llvm_Wa4yw2/hello.bc
llc /home/shyam/llvmbuild/Release+Debug+Asserts/bin/llc
/tmp/llvm_Wa4yw2/hello.bc -disable-fp-elim -disable-branch-fold -disable-cfi
-disable-debug-info-print
-load=/home/shyam/classpath-0.97.2/lib/vmkit/Release+Debug+Asserts/lib/StaticGCPrinter.so
-o /tmp/llvm_Wa4yw2/hello.s (null)
llc: VmkitGCPrinter.cpp:283: llvm::Constant* FindMetadata(const
llvm::Function&): Assertion `0 && "Should have found a
JavaMethod"' failed.0 llc 0x08c83b58Stack dump:0. Program arguments:
/home/shyam/llvmbuild/Release+Debug+Asserts/bin/llc /tmp/llvm_Wa4yw2/hello.bc
-disable-fp-elim -disable-branch-fold -disable-cfi -disable-debug-info-print
-load=/home/shyam/classpath-0.97.2/lib/vmkit/Release+Debug+Asserts/lib/StaticGCPrinter.so
-o /tmp/llvm_Wa4yw2/hello.s 1. Running pass 'Function Pass Manager' on
module '/tmp/llvm_Wa4yw2/hello.bc'.shyam at shyam:~$
After checking the code of VmkitGcPrinter.cpp the function Constant*
FindMetadata(const Function& F) cannot identify
JnJVM_hello_main___3Ljava_lang_String_2 (a function from hello.ll)
Can anyone tell me what went wrong
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