diff options
| author | Andreas Krebbel <Andreas.Krebbel@de.ibm.com> | 2011-11-16 09:27:56 +0000 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@gcc.gnu.org> | 2011-11-16 09:27:56 +0000 |
| commit | 41272e2a5dadf20e3477b4b4451bce1fb4240d31 (patch) | |
| tree | 02abdf440dc27128eba4ca2ee3aa9f9221b990a8 /gcc/expmed.c | |
| parent | f2a176dcf5386f2d7d3aaaba966bd4dd7acda1b4 (diff) | |
| download | gcc-41272e2a5dadf20e3477b4b4451bce1fb4240d31.zip gcc-41272e2a5dadf20e3477b4b4451bce1fb4240d31.tar.gz gcc-41272e2a5dadf20e3477b4b4451bce1fb4240d31.tar.bz2 | |
re PR middle-end/50325 (76 new fails with rev. 177691)
2011-11-16 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
PR middle-end/50325
* expmed.c (store_bit_field_1): Use extract_bit_field on big
endian targets if the source cannot be exactly covered by word
mode chunks.
From-SVN: r181405
Diffstat (limited to 'gcc/expmed.c')
| -rw-r--r-- | gcc/expmed.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index b3e6d6d..6a9da64 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -543,7 +543,8 @@ store_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize, is not allowed. */ fieldmode = GET_MODE (value); if (fieldmode == VOIDmode) - fieldmode = smallest_mode_for_size (nwords * BITS_PER_WORD, MODE_INT); + fieldmode = smallest_mode_for_size (nwords * + BITS_PER_WORD, MODE_INT); last = get_last_insn (); for (i = 0; i < nwords; i++) @@ -557,9 +558,18 @@ store_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize, 0) : (int) i * BITS_PER_WORD); rtx value_word = operand_subword_force (value, wordnum, fieldmode); - - if (!store_bit_field_1 (op0, MIN (BITS_PER_WORD, - bitsize - i * BITS_PER_WORD), + unsigned HOST_WIDE_INT new_bitsize = + MIN (BITS_PER_WORD, bitsize - i * BITS_PER_WORD); + + /* If the remaining chunk doesn't have full wordsize we have + to make sure that for big endian machines the higher order + bits are used. */ + if (new_bitsize < BITS_PER_WORD && BYTES_BIG_ENDIAN) + value_word = extract_bit_field (value_word, new_bitsize, 0, + true, false, NULL_RTX, + BLKmode, word_mode); + + if (!store_bit_field_1 (op0, new_bitsize, bitnum + bit_offset, bitregion_start, bitregion_end, word_mode, |