From 7c791b139c5143cc357c0c48c14af5a962197503 Mon Sep 17 00:00:00 2001 From: Richard Kenner Date: Mon, 7 Dec 1992 21:43:55 -0500 Subject: [PATCH] (eliminate_regs_in_insn): Make another copy of all the RTL if we changed something and we aren't permanently replacing. From-SVN: r2845 --- gcc/reload1.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/gcc/reload1.c b/gcc/reload1.c index 7ffef0d9481..7458018b81c 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -2996,6 +2996,14 @@ eliminate_regs_in_insn (insn, replace) new_body = eliminate_regs (old_body, 0, replace ? insn : NULL_RTX); if (new_body != old_body) { + /* If we aren't replacing things permanently and we changed something, + make another copy to ensure that all the RTL is new. Otherwise + things can go wrong if find_reload swaps commutative operands + and one is inside RTL that has been copied while the other is not. */ + + if (! replace) + new_body = copy_rtx (new_body); + /* If we had a move insn but now we don't, rerecognize it. */ if ((GET_CODE (old_body) == SET && GET_CODE (SET_SRC (old_body)) == REG && (GET_CODE (new_body) != SET -- 2.30.2