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loop.c (move_movables): While removing insn sequences... 

* loop.c (move_movables): While removing insn sequences, preserve
	the next pointer of the most recently deleted insn when we skip
	over a NOTE.

From-SVN: r22402
This commit is contained in:
David S. Miller 1998-09-13 05:44:40 +00:00 committed by David S. Miller
parent 50a029fdcc
commit 9655bf953a
2 changed files with 26 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Sun Sep 13 04:37:28 1998 David S. Miller <davem@pierdol.cobaltmicro.com>
* loop.c (move_movables): While removing insn sequences, preserve
the next pointer of the most recently deleted insn when we skip
over a NOTE.
Sat Sep 12 11:37:19 1998 Michael Meissner <meissner@cygnus.com>
* rs6000.h ({ASM,CPP}_CPU_SPEC): Add support for all machines

23
gcc/loop.c
View File

@ -1916,9 +1916,17 @@ move_movables (movables, threshold, insn_count, loop_start, end, nregs)
temp = delete_insn (temp);
}
temp = p;
p = delete_insn (p);
/* simplify_giv_expr expects that it can walk the insns
at m->insn forwards and see this old sequence we are
tossing here. delete_insn does preserve the next
pointers, but when we skip over a NOTE we must fix
it up. Otherwise that code walks into the non-deleted
insn stream. */
while (p && GET_CODE (p) == NOTE)
p = NEXT_INSN (p);
p = NEXT_INSN (temp) = NEXT_INSN (p);
}
start_sequence ();
@ -2125,9 +2133,18 @@ move_movables (movables, threshold, insn_count, loop_start, end, nregs)
XEXP (temp, 0) = i1;
}
temp = p;
delete_insn (p);
do p = NEXT_INSN (p);
while (p && GET_CODE (p) == NOTE);
p = NEXT_INSN (p);
/* simplify_giv_expr expects that it can walk the insns
at m->insn forwards and see this old sequence we are
tossing here. delete_insn does preserve the next
pointers, but when we skip over a NOTE we must fix
it up. Otherwise that code walks into the non-deleted
insn stream. */
while (p && GET_CODE (p) == NOTE)
p = NEXT_INSN (temp) = NEXT_INSN (p);
}
/* The more regs we move, the less we like moving them. */