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| author | Richard Guenther <rguenther@suse.de> | 2007-12-13 14:22:23 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2007-12-13 14:22:23 +0000 |
| commit | 863d2a5760cc1e9c2e64ab97c471cd37b7e254ca (patch) | |
| tree | e093a6851a7defde4e02f4c80a5cdb3acacf2c70 /gcc/tree-ssa-pre.c | |
| parent | 3905a1b25a31c60a66b3736af9c71bc3cad8cdc2 (diff) | |
| download | gcc-863d2a5760cc1e9c2e64ab97c471cd37b7e254ca.zip gcc-863d2a5760cc1e9c2e64ab97c471cd37b7e254ca.tar.gz gcc-863d2a5760cc1e9c2e64ab97c471cd37b7e254ca.tar.bz2 | |
re PR middle-end/34450 (compile takes up 1.8 GB RAM at -O1)
2007-12-13 Richard Guenther <rguenther@suse.de>
PR tree-optimization/34450
* params.def (PARAM_SCCVN_MAX_SCC_SIZE): New param.
* invoke.texi (sccvn-max-scc-size): Document.
* Makefile.in (tree-ssa-sccvn.o): Add $(PARAMS_H) dependency.
* tree-ssa-sccvn.h (run_scc_vn): Return true on success, false
on error.
* tree-ssa-sccvn.c (params.h): Include.
(DFS): Return true if all went well, return false as soon as
a SCC exceeds the size of PARAM_SCCVN_MAX_SCC_SIZE.
(run_scc_vn): Return true if all went well, return false if
we aborted during DFS.
* tree-ssa-pre.c (execute_pre): Check if SCCVN finished
successfully, otherwise bail out.
From-SVN: r130895
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 59396fd..c947e0f 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -3933,7 +3933,13 @@ execute_pre (bool do_fre) insert_fake_stores (); /* Collect and value number expressions computed in each basic block. */ - run_scc_vn (); + if (!run_scc_vn ()) + { + if (!do_fre) + remove_dead_inserted_code (); + fini_pre (); + return; + } switch_to_PRE_table (); compute_avail (); |