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| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-02-20 12:56:01 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-02-20 12:56:01 +0000 |
| commit | 86482d6bf55db0eea64cf549bf04c6763f4074a4 (patch) | |
| tree | c37b4e8fdb620aa7e10238c591d1e5c0c5753af2 /gcc/doc | |
| parent | cd102cfc1332aec577e6ed9cbed3283297ed7ba1 (diff) | |
| download | gcc-86482d6bf55db0eea64cf549bf04c6763f4074a4.tar.gz | |
PR middle-end/39157
* Makefile.in (loop-invariant.o): Depend on $(PARAMS_H).
* params.h (LOOP_INVARIANT_MAX_BBS_IN_LOOP): Define.
* params.def (loop-invariant-max-bbs-in-loop): New parameter.
* opts.c (decode_options): Set loop-invariant-max-bbs-in-loop
parameter to 1000 for -O1 by default.
* doc/invoke.texi (loop-invariant-max-bbs-in-loop): Document new
parameter.
* loop-invariant.c: Include params.h.
(move_loop_invariants): Don't call move_single_loop_invariants on
very large loops.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@144320 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index f52b6433160..f12124ccdc1 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -7766,6 +7766,13 @@ lower quality register allocation algorithm will be used. The algorithm do not use pseudo-register conflicts. The default value of the parameter is 2000. +@item loop-invariant-max-bbs-in-loop +Loop invariant motion can be very expensive, both in compile time and +in amount of needed compile time memory, with very large loops. Loops +with more basic blocks than this parameter won't have loop invariant +motion optimization performed on them. The default value of the +parameter is 1000 for -O1 and 10000 for -O2 and above. + @end table @end table |