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| author | Caroline Tice <ctice@apple.com> | 2004-08-25 19:52:54 +0000 |
|---|---|---|
| committer | Caroline Tice <ctice@gcc.gnu.org> | 2004-08-25 12:52:54 -0700 |
| commit | 8e8d51622f9c4aca782074532ee563f4c70f2e2f (patch) | |
| tree | a5867d1e566bb25285998220b8ed1c4261740f02 /gcc/doc | |
| parent | 41a21e1d8b4bf5ed02dd953d8059c6c311f89edf (diff) | |
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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.
From-SVN: r86570
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 4437699..25acc61 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -4617,6 +4617,11 @@ to reduce number of taken branches, partitions hot and cold basic blocks into separate sections of the assembly and .o files, to improve paging and cache locality performance. +This optimization is automatically turned off in the presence of +exception handling, for linkonce sections, for functions with a user-defined +section attribute and on any architecture that does not support named +sections. + @item -freorder-functions @opindex freorder-functions Reorder basic blocks in the compiled function in order to reduce number of |