(expand_divmod): If rem_flag, always force op0 to a register.

From-SVN: r6053

diff --git a/gcc/expmed.c b/gcc/expmed.c
index fb4b9f0598aacf46e66cae2ad1813ec4963c05db..aff18612f9911b4a6dcf37e74a90519a4aefd847 100644 (file)
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -2403,8 +2403,9 @@ expand_divmod (rem_flag, code, mode, op0, op1, target, unsignedp)
       || code == ROUND_MOD_EXPR || code == ROUND_DIV_EXPR)
     {
       /* If we want the remainder, we may need to use OP0, so make sure
-        it and ADJUSTED_OP0 are in different registers.  If we want to
-        preserve subexpressions, make sure OP0 is in a register.
+        it and ADJUSTED_OP0 are in different registers.  We force OP0
+        to a register in case it has any queued subexpressions, because
+        emit_cmp_insn will call emit_queue.
 
         If we don't want the remainder, we aren't going to use OP0 anymore.
         However, if we cannot clobber OP0 (and hence ADJUSTED_OP0), we must
@@ -2414,7 +2415,7 @@ expand_divmod (rem_flag, code, mode, op0, op1, target, unsignedp)
         CAN_CLOBBER_OP0 will be zero and we know that OP0 cannot
         equal TARGET.  */
 
-      if (rem_flag && preserve_subexpressions_p ())
+      if (rem_flag)
        op0 = force_reg (compute_mode, op0);
 
       if (! can_clobber_op0)