Delete some dead code.

Delete some dead code.
(FUNCTION_{PROLOGUE,EPILOGUE}): Call output_func_{prologue,epilogue}.
(INITIAL_ELIMINATION_OFFSET): Inspect all registers, but only add those that
are not in call_used_regs.
(GO_IF_LEGITIMATE_INDEX): Change type of variable 'range' to HOST_WIDE_INT;
change type of variable 'code' to enum rtx_code.

(arm_output_asm_insn): Delete declaration.
(EXTRA_CONSTAINT): New constraint 'R' to match a constant pool label.
Make constraint 'S' never match when not optimizing.
(CONSTANT_ADDRESS_P): Only accept symbols marked with SYMBOL_REF_FLAG when
optimizing.
(ENCODE_SECTION_INFO): Don't mark any symbols when not optimizing.
(ASM_OUTPUT_REG_{PUSH,POP}: Don't call arm_increase_location.
(ASM_OUTPUT_ADDR_VEC_ELT): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@7417 138bc75d-0d04-0410-961f-82ee72b054a4