===================================================================
@@ -526,6 +526,7 @@ maybe_select_cc_mode (struct comparison *cmp, rtx
static rtx
equivalent_reg_at_start (rtx reg, rtx_insn *end, rtx_insn *start)
{
+ machine_mode orig_mode = GET_MODE (reg);
rtx_insn *bb_head = BB_HEAD (BLOCK_FOR_INSN (end));
for (rtx_insn *insn = PREV_INSN (end);
@@ -572,6 +573,9 @@ equivalent_reg_at_start (rtx reg, rtx_insn *end, r
return NULL_RTX;
}
+ if (GET_MODE (reg) != orig_mode)
+ return NULL_RTX;
+
return reg;
}