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| author | Jakub Jelinek <jakub@redhat.com> | 2011-03-17 13:35:04 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2011-03-17 13:35:04 +0100 |
| commit | 1b6fa86002afb4a8f28ab40afc812ec5e73ccba6 (patch) | |
| tree | f38d80304975154c0fc076b80fccc2023ac48021 /gcc/dse.c | |
| parent | cb21e9cdf7176be9c23c3a003822cf7a3d3f4995 (diff) | |
| download | gcc-1b6fa86002afb4a8f28ab40afc812ec5e73ccba6.zip gcc-1b6fa86002afb4a8f28ab40afc812ec5e73ccba6.tar.gz gcc-1b6fa86002afb4a8f28ab40afc812ec5e73ccba6.tar.bz2 | |
re PR rtl-optimization/48141 (DSE compile time hog)
PR rtl-optimization/48141
* dse.c (record_store): If no positions are needed in an insn
that cannot be deleted, at least unchain it from active_local_stores.
* gcc.dg/pr48141.c: New test.
From-SVN: r171089
Diffstat (limited to 'gcc/dse.c')
| -rw-r--r-- | gcc/dse.c | 8 |
1 files changed, 4 insertions, 4 deletions
@@ -1,5 +1,5 @@ /* RTL dead store elimination. - Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 + Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. Contributed by Richard Sandiford <rsandifor@codesourcery.com> @@ -1530,8 +1530,7 @@ record_store (rtx body, bb_info_t bb_info) /* An insn can be deleted if every position of every one of its s_infos is zero. */ - if (any_positions_needed_p (s_info) - || ptr->cannot_delete) + if (any_positions_needed_p (s_info)) del = false; if (del) @@ -1543,7 +1542,8 @@ record_store (rtx body, bb_info_t bb_info) else active_local_stores = ptr->next_local_store; - delete_dead_store_insn (insn_to_delete); + if (!insn_to_delete->cannot_delete) + delete_dead_store_insn (insn_to_delete); } else last = ptr; |