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| author | Jeffrey A Law <law@cygnus.com> | 1999-02-06 09:41:08 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1999-02-06 02:41:08 -0700 |
| commit | 54ca6ffa139060575be8487db82d2cb551638eb5 (patch) | |
| tree | d249beba76b9a8b8cfd5d3f7caa6cb2e6fc8d9d1 /gcc/reload1.c | |
| parent | bdc1937ed9b8094c8fcb835b594d67812883003f (diff) | |
| download | gcc-54ca6ffa139060575be8487db82d2cb551638eb5.zip gcc-54ca6ffa139060575be8487db82d2cb551638eb5.tar.gz gcc-54ca6ffa139060575be8487db82d2cb551638eb5.tar.bz2 | |
reload1.c (reload_combine_note_store): Be more careful with STRICT_LOW_PART, ZERO_EXTRACT and SIGN_EXTRACT.
* reload1.c (reload_combine_note_store): Be more careful with
STRICT_LOW_PART, ZERO_EXTRACT and SIGN_EXTRACT.
(move2add_note_store): Likewise.
From-SVN: r25055
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index cfacc78..f2cb20d 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -9732,9 +9732,15 @@ reload_combine_note_store (dst, set) if (GET_CODE (dst) != REG) return; regno += REGNO (dst); + /* note_stores might have stripped a STRICT_LOW_PART, so we have to be - careful with registers / register parts that are not full words. */ - if (size < (unsigned) UNITS_PER_WORD) + careful with registers / register parts that are not full words. + + Similarly for ZERO_EXTRACT and SIGN_EXTRACT. */ + if (GET_CODE (set) != SET + || GET_CODE (SET_DEST (set)) == ZERO_EXTRACT + || GET_CODE (SET_DEST (set)) == SIGN_EXTRACT + || GET_CODE (SET_DEST (set)) == STRICT_LOW_PART) { reg_state[regno].use_index = -1; reg_state[regno].store_ruid = reload_combine_ruid; @@ -10056,6 +10062,17 @@ move2add_note_store (dst, set) { rtx src = SET_SRC (set); + /* Indicate that this register has been recently written to, + but the exact contents are not available. */ + if (GET_CODE (SET_DEST (set)) == ZERO_EXTRACT + || GET_CODE (SET_DEST (set)) == SIGN_EXTRACT + || GET_CODE (SET_DEST (set)) == STRICT_LOW_PART) + { + reg_set_luid[regno] = move2add_luid; + reg_offset[regno] = dst; + return; + } + reg_mode[regno] = mode; switch (GET_CODE (src)) { |