diff options
Diffstat (limited to 'gcc/loop-iv.c')
| -rw-r--r-- | gcc/loop-iv.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/gcc/loop-iv.c b/gcc/loop-iv.c index f1e19d8..4619c62 100644 --- a/gcc/loop-iv.c +++ b/gcc/loop-iv.c @@ -2004,11 +2004,30 @@ simplify_using_initial_values (struct loop *loop, enum rtx_code op, rtx *expr) } } else - /* If we did not use this insn to make a replacement, any overlap - between stores in this insn and our expression will cause the - expression to become invalid. */ - if (for_each_rtx (expr, altered_reg_used, this_altered)) - goto out; + { + rtx *pnote, *pnote_next; + + /* If we did not use this insn to make a replacement, any overlap + between stores in this insn and our expression will cause the + expression to become invalid. */ + if (for_each_rtx (expr, altered_reg_used, this_altered)) + goto out; + + /* Likewise for the conditions. */ + for (pnote = &cond_list; *pnote; pnote = pnote_next) + { + rtx note = *pnote; + rtx old_cond = XEXP (note, 0); + + pnote_next = &XEXP (note, 1); + if (for_each_rtx (&old_cond, altered_reg_used, this_altered)) + { + *pnote = *pnote_next; + pnote_next = pnote; + free_EXPR_LIST_node (note); + } + } + } if (CONSTANT_P (*expr)) goto out; |