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| author | David S. Miller <davem@pierdol.cobaltmicro.com> | 1998-09-13 05:44:40 +0000 |
|---|---|---|
| committer | David S. Miller <davem@gcc.gnu.org> | 1998-09-12 22:44:40 -0700 |
| commit | 9655bf953a9f230518f1f1ac9303b8056b4babe8 (patch) | |
| tree | de4b1e5eb4f023ce5c6c0dd0094681a3a4513bd3 /gcc | |
| parent | 50a029fdcc3bfd5e17e1435fa5eabec3caa788ab (diff) | |
| download | gcc-9655bf953a9f230518f1f1ac9303b8056b4babe8.zip gcc-9655bf953a9f230518f1f1ac9303b8056b4babe8.tar.gz gcc-9655bf953a9f230518f1f1ac9303b8056b4babe8.tar.bz2 | |
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
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/loop.c | 23 |
2 files changed, 26 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 47464c3..fb5fe23 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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 @@ -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. */ |