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| author | Richard Sandiford <rsandifo@nildram.co.uk> | 2007-11-09 12:11:48 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2007-11-09 12:11:48 +0000 |
| commit | 06acf7d0ad169b40c2e7f83c7ed808b2e196a6a4 (patch) | |
| tree | f19b799e19f9ca3fd962b7caa8a728b5a281f61c /gcc/dse.c | |
| parent | ea9d4a19375522ae9834d75edb217325f3c3e111 (diff) | |
| download | gcc-06acf7d0ad169b40c2e7f83c7ed808b2e196a6a4.zip gcc-06acf7d0ad169b40c2e7f83c7ed808b2e196a6a4.tar.gz gcc-06acf7d0ad169b40c2e7f83c7ed808b2e196a6a4.tar.bz2 | |
dse.c (find_shift_sequence): Always choose an integer mode for new_mode.
gcc/
* dse.c (find_shift_sequence): Always choose an integer mode for
new_mode.
(replace_read): Require both the read and store mode to be
integer ones. Remove a then-redundant FLOAT_P check.
gcc/testsuite/
* gcc.target/mips/dse-1.c: Disable.
From-SVN: r130039
Diffstat (limited to 'gcc/dse.c')
| -rw-r--r-- | gcc/dse.c | 12 |
1 files changed, 6 insertions, 6 deletions
@@ -1447,7 +1447,7 @@ find_shift_sequence (rtx read_reg, continue; new_mode = smallest_mode_for_size (access_size * BITS_PER_UNIT, - GET_MODE_CLASS (read_mode)); + MODE_INT); new_reg = gen_reg_rtx (new_mode); start_sequence (); @@ -1473,9 +1473,8 @@ find_shift_sequence (rtx read_reg, of the arguments and could be precomputed. It may not be worth doing so. We could precompute if worthwhile or at least cache the results. The result - technically depends on SHIFT, ACCESS_SIZE, and - GET_MODE_CLASS (READ_MODE). But in practice the - answer will depend only on ACCESS_SIZE. */ + technically depends on both SHIFT and ACCESS_SIZE, + but in practice the answer will depend only on ACCESS_SIZE. */ if (cost > COSTS_N_INSNS (1)) continue; @@ -1557,7 +1556,8 @@ replace_read (store_info_t store_info, insn_info_t store_insn, if (!dbg_cnt (dse)) return false; - if (GET_MODE_CLASS (read_mode) != GET_MODE_CLASS (store_mode)) + if (GET_MODE_CLASS (read_mode) != MODE_INT + || GET_MODE_CLASS (store_mode) != MODE_INT) return false; /* To get here the read is within the boundaries of the write so @@ -1580,7 +1580,7 @@ replace_read (store_info_t store_info, insn_info_t store_insn, call to get rid of the read. */ if (shift) { - if (access_size > UNITS_PER_WORD || FLOAT_MODE_P (store_mode)) + if (access_size > UNITS_PER_WORD) return false; shift_seq = find_shift_sequence (read_reg, access_size, store_info, |