* config/msp430/msp430-protos.h: Add prototypes for new functions.
* config/msp430/msp430.c (msp430_preserve_reg_p): Add support for
interrupt handlers.
(is_attr_func): New function.
(msp430_is_interrupt_func): New function.
(is_naked_func): New function.
(is_reentrant_func): New function.
(is_critical_func): New function.
(msp430_start_function): Add annotations for function attributes.
(msp430_attr): New function.
(msp430_attribute_table): New.
(msp430_function_section): New function.
(TARGET_ASM_FUNCTION_SECTION): Define.
(msp430_builtin): New enum.
(msp430_init_builtins): New function.
(msp430_builtin_devl): New function.
(msp430_expand_builtin): New function.
(TARGET_INIT_BUILTINS): Define.
(TARGET_EXPAND_BUILTINS): Define.
(TARGET_BUILTIN_DECL): Define.
(msp430_expand_prologue): Add support for naked, interrupt,
critical and reentrant functions.
(msp430_expand_epilogue): Likewise.
(msp430_print_operand): Handle 'O' character.
* config/msp430/msp430.h (TARGET_CPU_CPP_BUILTINS): Define
NO_TRAMPOLINES.
* config/msp430/msp430.md (unspec): Add UNS_DINT, UNS_EINT,
UNS_PUSH_INTR, UNS_POP_INTR, UNS_BIC_SR, UNS_BIS_SR.
(pushm): Use a 'n' rather than an 'i' constraint.
(msp_return): Add generation of the interrupt return instruction.
(disable_interrupts): New pattern.
(enable_interrupts): New pattern.
(push_intr_state): New pattern.
(pop_intr_state): New pattern.
(bic_SR): New pattern.
(bis_SR): New pattern.
* doc/extend.texi: Document MSP430 function attributes and builtin
functions.
From-SVN: r202645
