diff options
| author | kenner <kenner@138bc75d-0d04-0410-961f-82ee72b054a4> | 1996-04-15 09:12:16 +0000 |
|---|---|---|
| committer | kenner <kenner@138bc75d-0d04-0410-961f-82ee72b054a4> | 1996-04-15 09:12:16 +0000 |
| commit | db321fd675882154cb7bd8296ad0af4db2c66af7 (patch) | |
| tree | 8ffc59dd5516d6775b3aec8ad56af9f42b4fd20a /gcc/combine.c | |
| parent | f6e3ef26b4812d7773a4640c5f5b7c798b25d519 (diff) | |
| download | gcc-db321fd675882154cb7bd8296ad0af4db2c66af7.tar.gz | |
(expand_field_assignment): Take SUBREG_WORD into account when have
STRICT_LOW_PART.
(make_extraction): Make a STRICT_LOW_PART at any low-order word.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@11775 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 4d0ac4cbc12..cf5ba4a1ff8 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -4957,7 +4957,7 @@ expand_field_assignment (x) { inner = SUBREG_REG (XEXP (SET_DEST (x), 0)); len = GET_MODE_BITSIZE (GET_MODE (XEXP (SET_DEST (x), 0))); - pos = const0_rtx; + pos = GEN_INT (BITS_PER_WORD * SUBREG_WORD (XEXP (SET_DEST (x), 0))); } else if (GET_CODE (SET_DEST (x)) == ZERO_EXTRACT && GET_CODE (XEXP (SET_DEST (x), 1)) == CONST_INT) @@ -5133,7 +5133,8 @@ make_extraction (mode, inner, pos, pos_rtx, len, if (tmode != BLKmode && ! (spans_byte && inner_mode != tmode) - && ((pos_rtx == 0 && pos == 0 && GET_CODE (inner) != MEM + && ((pos_rtx == 0 && (pos % BITS_PER_WORD) == 0 + && GET_CODE (inner) != MEM && (! in_dest || (GET_CODE (inner) == REG && (movstrict_optab->handlers[(int) tmode].insn_code @@ -5153,8 +5154,8 @@ make_extraction (mode, inner, pos, pos_rtx, len, field. If the original and current mode are the same, we need not adjust the offset. Otherwise, we do if bytes big endian. - If INNER is not a MEM, get a piece consisting of the just the field - of interest (in this case POS must be 0). */ + If INNER is not a MEM, get a piece consisting of just the field + of interest (in this case POS % BITS_PER_WORD must be 0). */ if (GET_CODE (inner) == MEM) { @@ -5178,10 +5179,11 @@ make_extraction (mode, inner, pos, pos_rtx, len, new = gen_rtx (SUBREG, tmode, inner, (WORDS_BIG_ENDIAN && GET_MODE_SIZE (inner_mode) > UNITS_PER_WORD - ? ((GET_MODE_SIZE (inner_mode) - - GET_MODE_SIZE (tmode)) - / UNITS_PER_WORD) - : 0)); + ? (((GET_MODE_SIZE (inner_mode) + - GET_MODE_SIZE (tmode)) + / UNITS_PER_WORD) + - pos / BITS_PER_WORD) + : pos / BITS_PER_WORD)); else new = inner; } |