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bb-reorder: Split out STC

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2015-09-23   Segher Boessenkool  <segher@kernel.crashing.org>

	* bb-reorder.c (reorder_basic_blocks_software_trace_cache): New
	function, factored out from ...
	(reorder_basic_blocks): ... here.

From-SVN: r228316
This commit is contained in:
Segher Boessenkool 2015-10-01 08:33:09 +02:00 committed by Segher Boessenkool
parent 26e5d47d44
commit af71fa391d
2 changed files with 24 additions and 11 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2015-10-01 Segher Boessenkool <segher@kernel.crashing.org>
* bb-reorder.c (reorder_basic_blocks_software_trace_cache): New
function, factored out from ...
(reorder_basic_blocks): ... here.
2015-10-01 Tom de Vries <tom@codesourcery.com>
* tree-cfg.c (dump_function_to_file): Dump function attributes using

29
gcc/bb-reorder.c
View File

@ -2226,24 +2226,15 @@ update_crossing_jump_flags (void)
}
}
/* Reorder basic blocks. The main entry point to this file. FLAGS is
the set of flags to pass to cfg_layout_initialize(). */
/* Reorder basic blocks using the software trace cache (STC) algorithm. */
static void
reorder_basic_blocks (void)
reorder_basic_blocks_software_trace_cache (void)
{
int n_traces;
int i;
struct trace *traces;
gcc_assert (current_ir_type () == IR_RTL_CFGLAYOUT);
if (n_basic_blocks_for_fn (cfun) <= NUM_FIXED_BLOCKS + 1)
return;
set_edge_can_fallthru_flag ();
mark_dfs_back_edges ();
/* We are estimating the length of uncond jump insn only once since the code
for getting the insn length always returns the minimal length now. */
if (uncond_jump_length == 0)
@ -2268,6 +2259,22 @@ reorder_basic_blocks (void)
connect_traces (n_traces, traces);
FREE (traces);
FREE (bbd);
}
/* Reorder basic blocks. The main entry point to this file. */
static void
reorder_basic_blocks (void)
{
gcc_assert (current_ir_type () == IR_RTL_CFGLAYOUT);
if (n_basic_blocks_for_fn (cfun) <= NUM_FIXED_BLOCKS + 1)
return;
set_edge_can_fallthru_flag ();
mark_dfs_back_edges ();
reorder_basic_blocks_software_trace_cache ();
relink_block_chain (/*stay_in_cfglayout_mode=*/true);