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| author | Jan Hubicka <jh@suse.cz> | 2009-06-30 16:56:37 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2009-06-30 14:56:37 +0000 |
| commit | 2de58650f962e371b06f00bdefd0b01b5f7e3f6a (patch) | |
| tree | b0873a32071a823e01701ec13011a3c5038ec083 /gcc/tree-cfg.c | |
| parent | 46db44ccaea515d561f7a63d0e07ee6ddbc1b869 (diff) | |
| download | gcc-2de58650f962e371b06f00bdefd0b01b5f7e3f6a.zip gcc-2de58650f962e371b06f00bdefd0b01b5f7e3f6a.tar.gz gcc-2de58650f962e371b06f00bdefd0b01b5f7e3f6a.tar.bz2 | |
cfgloopanal.c (check_irred): Move into ...
* cfgloopanal.c (check_irred): Move into ...
(mark_irreducible_loops): ... here; return true if ireducible
loops was found.
* ipa-pure-const.c: Include cfgloop.h and tree-scalar-evolution.h
(analyze_function): Try to prove loop finiteness.
* cfgloop.h (mark_irreducible_loops): Update prototype.
* Makefile.in (ipa-pure-const.o): Add dependency on SCEV and CFGLOOP.
From-SVN: r149101
Diffstat (limited to 'gcc/tree-cfg.c')
| -rw-r--r-- | gcc/tree-cfg.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c index 4c7c0db..049dd1d 100644 --- a/gcc/tree-cfg.c +++ b/gcc/tree-cfg.c @@ -5131,8 +5131,17 @@ gimple_move_block_after (basic_block bb, basic_block after) /* Return true if basic_block can be duplicated. */ static bool -gimple_can_duplicate_bb_p (const_basic_block bb ATTRIBUTE_UNUSED) +gimple_can_duplicate_bb_p (const_basic_block bb) { + gimple_stmt_iterator gsi = gsi_last_bb (bb); + + /* RTL expander has quite artificial limitation to at most one RESX instruction + per region. It can be fixed by turning 1-1 map to 1-many map, but since the + code needs to be rewritten to gimple level lowering and there is little reason + for duplicating RESX instructions in order to optimize code performance, we + just disallow it for the moment. */ + if (!gsi_end_p (gsi) && gimple_code (gsi_stmt (gsi)) == GIMPLE_RESX) + return false; return true; } |