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gcc/ * config/bfin/linux.h (TARGET_SUPPORTS_SYNC_CALLS): Define to 1. * config/bfin/uclinux.h (TARGET_SUPPORTS_SYNC_CALLS): Define to 1. * config/bfin/bfin.h (TARGET_SUPPORTS_SYNC_CALLS): Provide default of 0. * config/bfin/sync.md: New file. * config/bfin/bfin.md: Include it. (UNSPEC_ATOMIC): New. (UNSPEC_ONES): Provide a unique number. From Jie Zhang <jie.zhang@analog.com>: * config/bfin/bfin.c (ret_regs): New. (must_save_fp_p): Don't return true because of frame_pointer_needed. (must_save_rets_p): New. (n_regs_saved_by_prologue): Use must_save_rets_p instead of current_function_is_leaf. (do_link): Likewise. (do_unlink): Likewise. (expand_interrupt_handler_prologue): Use ret_regs array. (expand_interrupt_handler_epilogue): Use ret_regs array and pass return register to gen_return_internal. (bfin_expand_epilogue): Pass return register to gen_return_internal. (bfin_expand_call): Explicitly clobber RETS. * config/bfin/bfin.h (FUNCTION_RETURN_REGISTERS): Define. * config/bfin/bfin.md (call_symbol_fdpic, call_value_symbol_fdpic, call_insn_fdpic, call_value_insn_fdpic, call_symbol, call_value_symbol, call_insn, call_value_insn): Explicitly clobber RETS. (return_internal): Take a reg rtx rather than the register number. gcc/testsuite/ * lib/target-supports.exp (check_effective_target_sync_int_long): Supported on Blackfin Linux targets. From-SVN: r151381
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