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jump.c (next_nonnote_insn_in_loop): New function. 

* jump.c (next_nonnote_insn_in_loop): New function.
	(copy_loop_headers): Use next_nonnote_insn_in_loop instead of
	next_nonnote_insn.
	(duplicate_loop_exit_test). Likewise.

From-SVN: r61152
This commit is contained in:
Josef Zlomek 2003-01-10 14:46:19 +01:00 committed by Josef Zlomek
parent 861b264c95
commit fc01bf76e1
2 changed files with 33 additions and 3 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2003-01-10 Josef Zlomek <zlomekj@suse.cz>
* jump.c (next_nonnote_insn_in_loop): New function.
(copy_loop_headers): Use next_nonnote_insn_in_loop instead of
next_nonnote_insn.
(duplicate_loop_exit_test). Likewise.
2003-01-10 Josef Zlomek <zlomj9am@artax.karlin.mff.cuni.cz>
* Makefile.in (optabs.o): Add dependencies on basic-block.h and

29
gcc/jump.c
View File

@ -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;