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| author | Richard Kenner <kenner@gcc.gnu.org> | 1996-04-15 05:12:16 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1996-04-15 05:12:16 -0400 |
| commit | 4d9cfc7b05b0e2bca49d4a14147e7f46cd8d7c2a (patch) | |
| tree | 8ffc59dd5516d6775b3aec8ad56af9f42b4fd20a | |
| parent | cf4403481dd67ecec1f1faabd8492421d3680a76 (diff) | |
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(expand_field_assignment): Take SUBREG_WORD into account when have STRICT_LOW_PART.
(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.
From-SVN: r11775
| -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 4d0ac4c..cf5ba4a 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; } |