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* regmove.c (copy_src_to_dest): New argument max_old_uid. 

From-SVN: r25639
This commit is contained in:
J"orn Rennecke 1999-03-08 10:51:28 +00:00 committed by Joern Rennecke
parent 3c869bc5eb
commit 78dd9906fe
2 changed files with 16 additions and 7 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
Mon Mar 8 18:47:11 1999 J"orn Rennecke <amylaar@cygnus.co.uk>
* regmove.c (copy_src_to_dest): New argument max_old_uid.
Mon Mar 8 08:23:00 1999 Bruce Korb <korb@datadesign.com>
* ChangeLog: merged entries from fixincl-branch

19
gcc/regmove.c
View File

@ -43,7 +43,7 @@ static int optimize_reg_copy_1 PROTO((rtx, rtx, rtx));
static void optimize_reg_copy_2 PROTO((rtx, rtx, rtx));
static void optimize_reg_copy_3 PROTO((rtx, rtx, rtx));
static rtx gen_add3_insn PROTO((rtx, rtx, rtx));
static void copy_src_to_dest PROTO((rtx, rtx, rtx, int));
static void copy_src_to_dest PROTO((rtx, rtx, rtx, int, int));
static int *regmove_bb_head;
struct match {
@ -744,11 +744,12 @@ optimize_reg_copy_3 (insn, dest, src)
instead moving the value to dest directly before the operation. */
static void
copy_src_to_dest (insn, src, dest, loop_depth)
copy_src_to_dest (insn, src, dest, loop_depth, old_max_uid)
rtx insn;
rtx src;
rtx dest;
int loop_depth;
int old_max_uid;
{
rtx seq;
rtx link;
@ -820,11 +821,14 @@ copy_src_to_dest (insn, src, dest, loop_depth)
/* Is the insn the head of a basic block? If so extend it */
insn_uid = INSN_UID (insn);
move_uid = INSN_UID (move_insn);
bb = regmove_bb_head[insn_uid];
if (bb >= 0)
if (insn_uid < old_max_uid)
{
BLOCK_HEAD (bb) = move_insn;
regmove_bb_head[insn_uid] = -1;
bb = regmove_bb_head[insn_uid];
if (bb >= 0)
{
BLOCK_HEAD (bb) = move_insn;
regmove_bb_head[insn_uid] = -1;
}
}
/* Update the various register tables. */
@ -1534,7 +1538,8 @@ regmove_optimize (f, nregs, regmove_dump_file)
/* If we weren't able to replace any of the alternatives, try an
alternative appoach of copying the source to the destination. */
if (!success && copy_src != NULL_RTX)
copy_src_to_dest (insn, copy_src, copy_dst, loop_depth);
copy_src_to_dest (insn, copy_src, copy_dst, loop_depth,
old_max_uid);
}
}