diff options
| author | amodra <amodra@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-08-03 11:48:21 +0000 |
|---|---|---|
| committer | amodra <amodra@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-08-03 11:48:21 +0000 |
| commit | e0691b9aa474261d698e0da56ce498b456efb01e (patch) | |
| tree | 93c98a43871a16b1f0bacd16de0dd5976685e26b /gcc/jump.c | |
| parent | 7624240a9f3c4c7d94cb0f881dbc30c0a880fe6b (diff) | |
| download | gcc-e0691b9aa474261d698e0da56ce498b456efb01e.tar.gz | |
PR rtl-optimization/49941
* jump.c (mark_jump_label): Comment.
(mark_jump_label_1): Set JUMP_LABEL for return jumps.
* emit-rtl.c (copy_rtx_if_shared_1, copy_insn_1): Leave RETURN shared.
(mark_used_flags): Don't mark RETURN.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@177268 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/jump.c')
| -rw-r--r-- | gcc/jump.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/gcc/jump.c b/gcc/jump.c index 2026243fd29..8dc78f2aceb 100644 --- a/gcc/jump.c +++ b/gcc/jump.c @@ -1,7 +1,7 @@ /* Optimize jump instructions, for GNU compiler. Copyright (C) 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997 - 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010 - Free Software Foundation, Inc. + 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, + 2011 Free Software Foundation, Inc. This file is part of GCC. @@ -1039,6 +1039,7 @@ sets_cc0_p (const_rtx x) notes. If INSN is an INSN or a CALL_INSN or non-target operands of a JUMP_INSN, and there is at least one CODE_LABEL referenced in INSN, add a REG_LABEL_OPERAND note containing that label to INSN. + For returnjumps, the JUMP_LABEL will also be set as appropriate. Note that two labels separated by a loop-beginning note must be kept distinct if we have not yet done loop-optimization, @@ -1081,6 +1082,14 @@ mark_jump_label_1 (rtx x, rtx insn, bool in_mem, bool is_target) case CALL: return; + case RETURN: + if (is_target) + { + gcc_assert (JUMP_LABEL (insn) == NULL || JUMP_LABEL (insn) == x); + JUMP_LABEL (insn) = x; + } + return; + case MEM: in_mem = true; break; |