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| author | Segher Boessenkool <segher@kernel.crashing.org> | 2015-10-01 08:33:09 +0200 |
|---|---|---|
| committer | Segher Boessenkool <segher@gcc.gnu.org> | 2015-10-01 08:33:09 +0200 |
| commit | af71fa391d8bdfd5c3156a03afa42f0363a495a7 (patch) | |
| tree | c6a35c51714f7001412d66c0f25a732df021e59b /gcc | |
| parent | 26e5d47d44df43aaa6a14ae56bc057913c1d3e4c (diff) | |
| download | gcc-af71fa391d8bdfd5c3156a03afa42f0363a495a7.zip gcc-af71fa391d8bdfd5c3156a03afa42f0363a495a7.tar.gz gcc-af71fa391d8bdfd5c3156a03afa42f0363a495a7.tar.bz2 | |
bb-reorder: Split out STC
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
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/bb-reorder.c | 29 |
2 files changed, 24 insertions, 11 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c132980..053e902 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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 diff --git a/gcc/bb-reorder.c b/gcc/bb-reorder.c index 2110bd2..725cdc3 100644 --- a/gcc/bb-reorder.c +++ b/gcc/bb-reorder.c @@ -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); |