diff options
Diffstat (limited to 'gcc/dse.c')
| -rw-r--r-- | gcc/dse.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/dse.c b/gcc/dse.c index 9dab6259c17..9d19b7071ee 100644 --- a/gcc/dse.c +++ b/gcc/dse.c @@ -1446,7 +1446,7 @@ find_shift_sequence (int access_size, new_mode = GET_MODE_WIDER_MODE (new_mode)) { rtx target, new_reg, shift_seq, insn, new_lhs; - int cost; + int cost, offset; /* Try a wider mode if truncating the store mode to NEW_MODE requires a real instruction. */ @@ -1460,8 +1460,9 @@ find_shift_sequence (int access_size, if (!CONSTANT_P (store_info->rhs) && !MODES_TIEABLE_P (new_mode, store_mode)) continue; + offset = subreg_lowpart_offset (new_mode, store_mode); new_lhs = simplify_gen_subreg (new_mode, copy_rtx (store_info->rhs), - store_mode, 0); + store_mode, offset); if (new_lhs == NULL_RTX) continue; |