GCC Middle and Back End API Reference
Data Fields
dw_trace_info Struct Reference
Collaboration diagram for dw_trace_info:
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Data Fields

rtx_insn * head
 
dw_cfi_row * beg_row
 
dw_cfi_row * end_row
 
poly_int64 beg_true_args_size
 
poly_int64 end_true_args_size
 
poly_int64 beg_delay_args_size
 
poly_int64 end_delay_args_size
 
rtx_insn * eh_head
 
dw_cfa_location cfa_store
 
dw_cfa_location cfa_temp
 
vec< reg_saved_in_data > regs_saved_in_regs
 
unsigned id
 
bool switch_sections
 
bool args_size_undefined
 
bool args_size_defined_for_eh
 

Detailed Description

Since we no longer have a proper CFG, we're going to create a facsimile
of one on the fly while processing the frame-related insns.

We create dw_trace_info structures for each extended basic block beginning
and ending at a "save point".  Save points are labels, barriers, certain
notes, and of course the beginning and end of the function.

As we encounter control transfer insns, we propagate the "current"
row state across the edges to the starts of traces.  When checking is
enabled, we validate that we propagate the same data from all sources.

All traces are members of the TRACE_INFO array, in the order in which
they appear in the instruction stream.

All save points are present in the TRACE_INDEX hash, mapping the insn
starting a trace to the dw_trace_info describing the trace.

Field Documentation

◆ args_size_defined_for_eh

bool dw_trace_info::args_size_defined_for_eh

Referenced by connect_traces(), and notice_args_size().

◆ args_size_undefined

bool dw_trace_info::args_size_undefined

Referenced by connect_traces(), and maybe_record_trace_start().

◆ beg_delay_args_size

poly_int64 dw_trace_info::beg_delay_args_size

Referenced by connect_traces(), and notice_eh_throw().

◆ beg_row

dw_cfi_row* dw_trace_info::beg_row

Referenced by connect_traces(), create_pseudo_cfg(), and maybe_record_trace_start().

◆ beg_true_args_size

poly_int64 dw_trace_info::beg_true_args_size

Referenced by maybe_record_trace_start().

◆ cfa_store

dw_cfa_location dw_trace_info::cfa_store

Referenced by create_pseudo_cfg(), def_cfa_1(), dwarf2out_frame_debug_expr(), and maybe_record_trace_start().

◆ cfa_temp

dw_cfa_location dw_trace_info::cfa_temp

Referenced by create_pseudo_cfg(), dwarf2out_frame_debug_expr(), and maybe_record_trace_start().

◆ eh_head

rtx_insn* dw_trace_info::eh_head

Referenced by connect_traces(), notice_args_size(), and notice_eh_throw().

◆ end_delay_args_size

poly_int64 dw_trace_info::end_delay_args_size

Referenced by connect_traces(), and notice_eh_throw().

◆ end_row

dw_cfi_row * dw_trace_info::end_row

Referenced by connect_traces().

◆ end_true_args_size

poly_int64 dw_trace_info::end_true_args_size

Referenced by maybe_record_trace_start(), maybe_record_trace_start_abnormal(), notice_args_size(), notice_eh_throw(), and scan_trace().

◆ head

rtx_insn* dw_trace_info::head

Referenced by connect_traces(), create_pseudo_cfg(), get_trace_info(), and trace_info_hasher::hash().

◆ id

unsigned dw_trace_info::id

Referenced by connect_traces(), create_pseudo_cfg(), and maybe_record_trace_start().

◆ regs_saved_in_regs

vec<reg_saved_in_data> dw_trace_info::regs_saved_in_regs

Referenced by clobbers_queued_reg_save(), create_pseudo_cfg(), execute_dwarf2_frame(), maybe_record_trace_start(), record_reg_saved_in_reg(), and reg_saved_in().

◆ switch_sections

bool dw_trace_info::switch_sections

Referenced by connect_traces(), and create_pseudo_cfg().

The documentation for this struct was generated from the following file: