[LLVMdev] JIT on ARM

[Jim Grosbach]

Forgot to mention. I don't know how well the canadian cross compile  
stuff works in 2.5. We made some improvements in that area for 2.6. If  
you have trouble with it, I'd suggest trying 2.6 (or even better, ToT  
svn) and seeing if things are improved there.


-Jim
On Sep 25, 2009, at 2:04 AM, Martins Mozeiko wrote:

> Hello.
>
> My goal is to use LLVM with JIT compiler for ARM on Android device.
>
> Currently I have successfully built and executed LLVM bitcode with
> interpreter on Android. Speed is not so great, that is why I want to
> use JIT.
> I tried building bitcode on windows with llvm-gcc that is provided on
> llvm home page. Resulting bitcode runs great in interpreter, but it
> doesn't use JIT. From what I understand from LLVM that it is because
> of target triple or datalayout. On PC in my case target triple is
> "i386-mingw32", but LLVM JIT for ARM expects something that starts
> with "armv" or "thumb". Also datalayout differs a lot. If I understand
> correctly that is because bitcode actually contains some of platform
> specific optimizations (like integer endianness), so I can't simply
> change target triple string and everything will run.
>
> What I am now doing, is - I am trying to build gcc from gcc-4.2-
> llvm-2.5 sources with following configure line in cygwin shell:
>
> ../llvm-gcc4.2-2.4.source/configure --enable-languages=c,c++ --enable-
> checking --enable-llvm=$PWD/../llvm-objects --disable-bootstrap --
> disable-multilib --disable-nls --target=arm-eabi
>
> My undertanding is that this will produce llvm-gcc compiler that will
> output LLVM bitcode with target triple that starts with "arm", so LLVM
> will use JIT on it.
>
> Currently I am getting compile problems when running make (see below).
> Has anyone done something similar and can explain what I am doing
> wrong, or how should it be done in some other way to get JIT compiler
> running on ARM?
>
>
> make[2]: Entering directory `/cygdrive/r/android/llvm/llvm-gcc4.2-
> objects/gcc'
> gcc   -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wwrite-
> strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-
> long -Wno-variadic-macros -Wno-overlength-strings -Wold-style-
> definition -Wmissing-format-attribute -fno-common   -DHAVE_CONFIG_H -
> DGENERATOR_FILE  -o build/gengtype.exe \
>             build/gengtype.o build/gengtype-lex.o build/gengtype-
> yacc.o build/errors.o ../build-i686-pc-cygwin/libiberty/libiberty.a
> build/gengtype.o: In function `adjust_field_type':
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype.c:763: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype.c:771: undefined reference to
> `_lexer_line'
> build/gengtype.o: In function `adjust_field_tree_exp':
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype.c:713: undefined reference to
> `_lexer_line'
> build/gengtype.o: In function `adjust_field_rtx_def':
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype.c:488: undefined reference to
> `_lexer_line'
> build/gengtype.o: In function `adjust_field_type':
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype.c:785: undefined reference to
> `_lexer_line'
> build/gengtype.o:/cygdrive/r/android/llvm/llvm-gcc4.2-objects/
> gcc/../../llvm-gcc4.2-2.4.source/gcc/gengtype.c:725: more undefined
> references to `_lexer_line' follow
> build/gengtype.o: In function `main':
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype.c:3070: undefined reference to
> `_parse_file'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype.c:3070: undefined reference to
> `_parse_file'
> build/gengtype-yacc.o: In function `yyparse':
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:73: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:75: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:76: undefined reference to
> `_lexer_toplevel_done'
> build/gengtype-yacc.o: In function `yyparse':
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/gengtype-yacc.c:1873:
> undefined reference to `_yyerror'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/gengtype-yacc.c:1379:
> undefined reference to `_yylex'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/gengtype-yacc.c:1877:
> undefined reference to `_yyerror'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/gengtype-yacc.c:1995:
> undefined reference to `_yyerror'
> build/gengtype-yacc.o: In function `yyparse':
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:122: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:110: undefined reference to
> `_lexer_toplevel_done'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:102: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:97: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:92: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:239: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:235: undefined reference to
> `_lexer_line'
> build/gengtype-yacc.o:/cygdrive/r/android/llvm/llvm-gcc4.2-objects/
> gcc/../../llvm-gcc4.2-2.4.source/gcc/gengtype-yacc.y:231: more
> undefined references to `_lexer_line' follow
> build/gengtype-yacc.o: In function `yyparse':
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:84: undefined reference to
> `_lexer_toplevel_done'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:203: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:203: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:176: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:176: undefined reference to
> `_lexer_line'
> /cygdrive/r/android/llvm/llvm-gcc4.2-objects/gcc/../../llvm-
> gcc4.2-2.4.source/gcc/gengtype-yacc.y:165: undefined reference to
> `_lexer_line'
> build/gengtype-yacc.o:/cygdrive/r/android/llvm/llvm-gcc4.2-objects/
> gcc/../../llvm-gcc4.2-2.4.source/gcc/gengtype-yacc.y:165: more
> undefined references to `_lexer_line' follow
> collect2: ld returned 1 exit status
> make[2]: *** [build/gengtype.exe] Error 1
>
> --
> Martins Mozeiko
>
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