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| author | Doug Evans <dje@gnu.org> | 1994-02-03 22:14:46 +0000 |
|---|---|---|
| committer | Doug Evans <dje@gnu.org> | 1994-02-03 22:14:46 +0000 |
| commit | bac7cdfd7d0dfa7d9bb7065faf11882cc1922821 (patch) | |
| tree | 729e652b8d4b75152556a27d368ea68e1d233b09 /gcc | |
| parent | e658434c30adf83a498773944003d4e6e6c32335 (diff) | |
| download | gcc-bac7cdfd7d0dfa7d9bb7065faf11882cc1922821.zip gcc-bac7cdfd7d0dfa7d9bb7065faf11882cc1922821.tar.gz gcc-bac7cdfd7d0dfa7d9bb7065faf11882cc1922821.tar.bz2 | |
(store_bit_field, insv case): Don't use PUT_MODE on
xop0 when it is a SUBREG, generate a new SUBREG.
From-SVN: r6478
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/expmed.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index 09e51ad..ccf130e 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -421,7 +421,9 @@ store_bit_field (str_rtx, bitsize, bitnum, fieldmode, value, align, total_size) /* If xop0 is a register, we need it in MAXMODE to make it acceptable to the format of insv. */ if (GET_CODE (xop0) == SUBREG) - PUT_MODE (xop0, maxmode); + /* We can't just change the mode, because this might clobber op0, + and we will need the original value of op0 if insv fails. */ + xop0 = gen_rtx (SUBREG, maxmode, SUBREG_REG (xop0), SUBREG_WORD (xop0)); if (GET_CODE (xop0) == REG && GET_MODE (xop0) != maxmode) xop0 = gen_rtx (SUBREG, maxmode, xop0, 0); |