diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ext-dce.cc | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gcc/ext-dce.cc b/gcc/ext-dce.cc index 2869a38..6c961fe 100644 --- a/gcc/ext-dce.cc +++ b/gcc/ext-dce.cc @@ -632,10 +632,11 @@ ext_dce_process_uses (rtx_insn *insn, rtx obj, bitmap live_tmp) else if (!CONSTANT_P (y)) break; - /* We might have (ashift (const_int 1) (reg...)) */ - /* XXX share this logic with code below. */ + /* We might have (ashift (const_int 1) (reg...)) + By setting dst_mask we can continue iterating on the + the next operand and it will be considered fully live. */ if (binop_implies_op2_fully_live (GET_CODE (src))) - break; + dst_mask = -1; /* If this was anything but a binary operand, break the inner loop. This is conservatively correct as it will cause the |