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* config/i386/cygming.h (TARGET_SEH): New. (MAX_STACK_ALIGNMENT): New. Disable alignment for SEH. (TARGET_ASM_UNWIND_EMIT, TARGET_ASM_UNWIND_EMIT_BEFORE_INSN, TARGET_ASM_FUNCTION_END_PROLOGUE, SUBTARGET_ASM_UNWIND_INIT): New. (TARGET_OS_CPP_BUILTINS): Define __SEH__ as needed. (ASM_DECLARE_FUNCTION_NAME): Use i386_pe_start_function. (ASM_DECLARE_FUNCTION_SIZE): New. * config/i386/i386-protos.h: Update. * config/i386/i386.c (ix86_option_override_internal): Enable flag_unwind_tables with flag_asynchronous_unwind_tables immediately; restrict -mpreferred-stack-boundary for SEH; enable flag_fentry. (ix86_asm_output_function_label): Use SUBTARGET_ASM_UNWIND_INIT. (ix86_compute_frame_layout): For SEH, disable use_fast_prologue_epilogue, move frame pointer to the end of the frame. Initialize hfp_save_offset. (ix86_expand_prologue): Honor hfp_save_offset. Emit blockage at end of prologue for SEH. (ix86_expand_epilogue): For SEH, use pops, emit a nop if needed, emit blockage at beginning of epilogue. (ix86_expand_binary_operator): After reload, emit LEA if needed. (ix86_output_call_insn): New. * config/i386/i386.h (TARGET_SEH): New. (struct machine_function): Add member seh. * config/i386/i386.md (all call patterns): Use ix86_output_call_insn. * config/i386/winnt.c (struct seh_frame_state): New. (i386_pe_seh_init, i386_pe_seh_end_prologue, i386_pe_seh_fini, seh_emit_push, seh_emit_save, seh_emit_stackalloc, seh_cfa_adjust_cfa, seh_cfa_offset, seh_frame_related_expr, i386_pe_seh_unwind_emit, i386_pe_start_function, i386_pe_end_function): New. * dwarf2out.c (dwarf2out_frame_debug_expr): Accept CFA as well as CFA_STORE in rules 12 and 13. From-SVN: r166119
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