diff options
Diffstat (limited to 'gcc/cse.c')
| -rw-r--r-- | gcc/cse.c | 11 |
1 files changed, 6 insertions, 5 deletions
@@ -3807,8 +3807,8 @@ equiv_constant (rtx x) /* If we didn't and if doing so makes sense, see if we previously assigned a constant value to the enclosing word mode SUBREG. */ - if (GET_MODE_SIZE (mode) < GET_MODE_SIZE (word_mode) - && GET_MODE_SIZE (word_mode) < GET_MODE_SIZE (imode)) + if (known_lt (GET_MODE_SIZE (mode), UNITS_PER_WORD) + && known_lt (UNITS_PER_WORD, GET_MODE_SIZE (imode))) { poly_int64 byte = (SUBREG_BYTE (x) - subreg_lowpart_offset (mode, word_mode)); @@ -5986,9 +5986,10 @@ cse_insn (rtx_insn *insn) already entered SRC and DEST of the SET in the table. */ if (GET_CODE (dest) == SUBREG - && (((GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest))) - 1) - / UNITS_PER_WORD) - == (GET_MODE_SIZE (GET_MODE (dest)) - 1) / UNITS_PER_WORD) + && (known_equal_after_align_down + (GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest))) - 1, + GET_MODE_SIZE (GET_MODE (dest)) - 1, + UNITS_PER_WORD)) && !partial_subreg_p (dest) && sets[i].src_elt != 0) { |