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| author | ctice <ctice@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-08-25 19:52:54 +0000 |
|---|---|---|
| committer | ctice <ctice@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-08-25 19:52:54 +0000 |
| commit | 1118aef745a25250fb86472ad8a585f335a233cf (patch) | |
| tree | a5867d1e566bb25285998220b8ed1c4261740f02 /gcc/cfgbuild.c | |
| parent | 63bd12e19c98ff38073b1d971a736999c7bfaedc (diff) | |
| download | gcc-1118aef745a25250fb86472ad8a585f335a233cf.tar.gz | |
Add more details to hot/cold partitioning comments and documentation.
2004-08-25 Caroline Tice <ctice@apple.com>
* bb-reorder.c (partition_hot_cold_basic_blocks): Add more details
to comments at start of function.
* cfgbuild.c (make_edges): Add more details to hot/cold partitioning
comment.
* cfgcleanup.c (try_simplify_condjump, try_forward_edges,
merge_blocks_move_predecessor_nojumps,
merge_blocks_move_successor_nojumps, merge_blocks_move,
try_crossjump_to_edge, try_crossjump_bb): Likewise.
* cfglayout.c (fixup_reorder_chain): Likewise.
* cfgrtl.c (rtl_can_merge_blocks, try_redirect_by_replacing_jump,
cfg_layout_can_merge_blocks_p): Likewise.
* ifcvt.c (find_if_case_1, find_if_case_2): Likewise.
* passes.c (rest_of_compilation): Update comments for calling
optimization that partitions hot/cold basic blocks.
* doc/invoke.texi: Update documentation of
freorder-blocks-and-partition flag.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@86570 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/cfgbuild.c')
| -rw-r--r-- | gcc/cfgbuild.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/cfgbuild.c b/gcc/cfgbuild.c index cb451efe4f2..6c4a67ac572 100644 --- a/gcc/cfgbuild.c +++ b/gcc/cfgbuild.c @@ -232,7 +232,10 @@ make_edges (basic_block min, basic_block max, int update_p) current_function_has_computed_jump = 0; /* If we are partitioning hot and cold basic blocks into separate - sections, we cannot assume there is no computed jump. */ + sections, we cannot assume there is no computed jump (partitioning + sometimes requires the use of indirect jumps; see comments about + partitioning at the top of bb-reorder.c:partition_hot_cold_basic_blocks + for complete details). */ if (flag_reorder_blocks_and_partition) current_function_has_computed_jump = 1; |