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| author | kan <kan@FreeBSD.org> | 2003-02-10 05:41:50 +0000 |
|---|---|---|
| committer | kan <kan@FreeBSD.org> | 2003-02-10 05:41:50 +0000 |
| commit | 793833d7a78bb624965885760593495e7079d705 (patch) | |
| tree | f843ff90d71b900271088361ed96ff82eb2a365d /contrib/gcc/jump.c | |
| parent | 1b04fed26051ebc88f26a7bb93c63c270970e773 (diff) | |
| download | FreeBSD-src-793833d7a78bb624965885760593495e7079d705.zip FreeBSD-src-793833d7a78bb624965885760593495e7079d705.tar.gz | |
Gcc 3.2.2-release.
Diffstat (limited to 'contrib/gcc/jump.c')
| -rw-r--r-- | contrib/gcc/jump.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/contrib/gcc/jump.c b/contrib/gcc/jump.c index 14baeed..f60e169 100644 --- a/contrib/gcc/jump.c +++ b/contrib/gcc/jump.c @@ -1,6 +1,6 @@ /* Optimize jump instructions, for GNU compiler. Copyright (C) 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997 - 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. + 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. This file is part of GCC. @@ -59,6 +59,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA or even change what is live at any point. So perhaps let combiner do it. */ +static rtx next_nonnote_insn_in_loop PARAMS ((rtx)); static int init_label_info PARAMS ((rtx)); static void mark_all_labels PARAMS ((rtx)); static int duplicate_loop_exit_test PARAMS ((rtx)); @@ -119,6 +120,27 @@ cleanup_barriers () } } +/* Return the next insn after INSN that is not a NOTE and is in the loop, + i.e. when there is no such INSN before NOTE_INSN_LOOP_END return NULL_RTX. + This routine does not look inside SEQUENCEs. */ + +static rtx +next_nonnote_insn_in_loop (insn) + rtx insn; +{ + while (insn) + { + insn = NEXT_INSN (insn); + if (insn == 0 || GET_CODE (insn) != NOTE) + break; + if (GET_CODE (insn) == NOTE + && NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_END) + return NULL_RTX; + } + + return insn; +} + void copy_loop_headers (f) rtx f; @@ -137,7 +159,7 @@ copy_loop_headers (f) the values of regno_first_uid and regno_last_uid. */ if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_BEG - && (temp1 = next_nonnote_insn (insn)) != 0 + && (temp1 = next_nonnote_insn_in_loop (insn)) != 0 && any_uncondjump_p (temp1) && onlyjump_p (temp1)) { temp = PREV_INSN (insn); @@ -293,7 +315,8 @@ duplicate_loop_exit_test (loop_start) rtx insn, set, reg, p, link; rtx copy = 0, first_copy = 0; int num_insns = 0; - rtx exitcode = NEXT_INSN (JUMP_LABEL (next_nonnote_insn (loop_start))); + rtx exitcode + = NEXT_INSN (JUMP_LABEL (next_nonnote_insn_in_loop (loop_start))); rtx lastexit; int max_reg = max_reg_num (); rtx *reg_map = 0; |
