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| author | Richard Kenner <kenner@gcc.gnu.org> | 1992-12-07 21:43:55 -0500 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1992-12-07 21:43:55 -0500 |
| commit | 7c791b139c5143cc357c0c48c14af5a962197503 (patch) | |
| tree | f02a2e58e54c9983eab4d5c447113e0bef1d5989 /gcc | |
| parent | df6c0bdc911b40b90dd9d29a7cb2cebcfe9fc5dc (diff) | |
| download | gcc-7c791b139c5143cc357c0c48c14af5a962197503.zip gcc-7c791b139c5143cc357c0c48c14af5a962197503.tar.gz gcc-7c791b139c5143cc357c0c48c14af5a962197503.tar.bz2 | |
(eliminate_regs_in_insn): Make another copy of all the RTL if we
changed something and we aren't permanently replacing.
From-SVN: r2845
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/reload1.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index 7ffef0d..7458018 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 |