* src/vm/jit/alpha/md.c (md_assembler_get_patch_address): New method.

* src/vm/jit/alpha/md.c (md_assembler_get_patch_address): New method.
(md_codegen_findmethod): Use assert's directly.

* src/vm/jit/mips/md.c (md_assembler_get_patch_address): Likewise.
(md_codegen_findmethod): Likewise.

* src/vm/jit/alpha/codegen.c (createcompilerstub): Store the
methodinfo pointer in the same place as in the methodheader for
compiled methods and pass the pointer in REG_ITMP1.

* src/vm/jit/alpha/md-asm.h (mptr): Defined.

* src/vm/jit/powerpc/asmpart.S (asm_call_jit_compiler): methodinfo
pointer is passed via itmp1.  Use md_assembler_get_patch_address to
get the patch address.
(asm_calljavafunction, asm_calljavafunction2): Pass methodinfo pointer
via itmp1.