PR rtl-optimization/34999

	PR rtl-optimization/34999
	* dwarf2out.c (struct dw_fde_struct): Add dw_fde_switch_cfi
	and dw_fde_switched_cold_to_hot fields.
	(output_cfi_p): New function.
	(output_call_frame_info): If fde->dw_fde_switched_sections,
	output 2 FDEs instead of one with corrupted header.
	(dwarf2out_do_cfi_startproc): New function.
	(dwarf2out_begin_prologue): Use it.  Initialize fde->dw_fde_switch_cfi
	and fde->dw_fde_switched_cold_to_hot.
	(dwarf2out_switch_text_section): Compute
	fde->dw_fde_switched_cold_to_hot.  Switch to new text section here.
	If dwarf2out_do_cfi_asm, emit .cfi_endproc before it and call
	dwarf2out_do_cfi_startproc plus emit again currently active CFI insns.
	Otherwise, compute fde->dw_fde_switch_cfi.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@150069 138bc75d-0d04-0410-961f-82ee72b054a4