diff options
Diffstat (limited to 'gcc/avoid-store-forwarding.cc')
| -rw-r--r-- | gcc/avoid-store-forwarding.cc | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/gcc/avoid-store-forwarding.cc b/gcc/avoid-store-forwarding.cc index 34a7bba..ded8d7e 100644 --- a/gcc/avoid-store-forwarding.cc +++ b/gcc/avoid-store-forwarding.cc @@ -238,10 +238,15 @@ process_store_forwarding (vec<store_fwd_info> &stores, rtx_insn *load_insn, { start_sequence (); - rtx ext0 = gen_rtx_ZERO_EXTEND (GET_MODE (dest), it->mov_reg); - if (ext0) + machine_mode dest_mode = GET_MODE (dest); + rtx base_reg = it->mov_reg; + if (known_gt (GET_MODE_BITSIZE (dest_mode), + GET_MODE_BITSIZE (GET_MODE (it->mov_reg)))) + base_reg = gen_rtx_ZERO_EXTEND (dest_mode, it->mov_reg); + + if (base_reg) { - rtx_insn *move0 = emit_move_insn (dest, ext0); + rtx_insn *move0 = emit_move_insn (dest, base_reg); if (recog_memoized (move0) >= 0) { insns = get_insns (); |