* src/vm/jit/sparc64/codegen.h: Removed asserts for stores with sethi.

* src/vm/jit/sparc64/codegen.h: Removed asserts for stores with sethi.

* src/vm/jit/sparc64/codegen.c: Added code to fill with nops when a patcher is right at the
end of a basic block.

* src/vm/jit/sparc64/asmpart.S (asm_vm_call_method_end): Returning 0 when an exception occurs.

* src/vm/jit/sparc64/md.c (md_get_method_patch_address): Improved handling of mptr loads when
a sethi is involved.