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| author | Jakub Jelinek <jakub@redhat.com> | 2011-01-03 21:59:20 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2011-01-03 21:59:20 +0100 |
| commit | 9766135bb18d75cd0d5257d21de485e953e3505e (patch) | |
| tree | a5d208c43ab55221a90b175688171ca074b3ad73 /gcc/combine.c | |
| parent | d652f226fca1e942b7851d1205f8a6a472d9e0a0 (diff) | |
| download | gcc-9766135bb18d75cd0d5257d21de485e953e3505e.zip gcc-9766135bb18d75cd0d5257d21de485e953e3505e.tar.gz gcc-9766135bb18d75cd0d5257d21de485e953e3505e.tar.bz2 | |
re PR rtl-optimization/47157 (ICE: in calc_dfs_tree, at dominance.c:395 with -O)
PR rtl-optimization/47157
* combine.c (try_combine): If undobuf.other_insn becomes
(set (pc) (pc)) jump, call update_cfg_for_uncondjump on it
and set *new_direct_jump_p too.
* gcc.c-torture/compile/pr47157.c: New test.
From-SVN: r168439
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index d9d6838..3ee53e6 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -1,7 +1,7 @@ /* Optimize by combining instructions for GNU compiler. Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 - Free Software Foundation, Inc. + 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, + 2011 Free Software Foundation, Inc. This file is part of GCC. @@ -4378,6 +4378,15 @@ try_combine (rtx i3, rtx i2, rtx i1, rtx i0, int *new_direct_jump_p) update_cfg_for_uncondjump (i3); } + if (undobuf.other_insn != NULL_RTX + && GET_CODE (PATTERN (undobuf.other_insn)) == SET + && SET_SRC (PATTERN (undobuf.other_insn)) == pc_rtx + && SET_DEST (PATTERN (undobuf.other_insn)) == pc_rtx) + { + *new_direct_jump_p = 1; + update_cfg_for_uncondjump (undobuf.other_insn); + } + combine_successes++; undo_commit (); |