[OpenRISC] [PATCH v2 5/5] or1k: only force reg for immediates

[Stafford Horne <shorne@gmail.com>]

The force_reg in or1k_expand_compare is hard coded for SImode, which is fine as
this used to only be used on SI expands.  However, with FP support this will
cause issues.  In general we should only force the right hand operand to a
register if its an immediate.  This patch adds an condition to check for that.

gcc/ChangeLog:

	* config/or1k/or1k.c (or1k_expand_compare): Check for int before
	force_reg.
---
Changes since v1:
 - none

 gcc/config/or1k/or1k.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/gcc/config/or1k/or1k.c b/gcc/config/or1k/or1k.c
index d90826b75ca..e4aff83cec7 100644
--- a/gcc/config/or1k/or1k.c
+++ b/gcc/config/or1k/or1k.c
@@ -1446,13 +1446,15 @@ void
 or1k_expand_compare (rtx *operands)
 {
   rtx sr_f = gen_rtx_REG (BImode, SR_F_REGNUM);
+  rtx righthand_op = XEXP (operands[0], 1);
   rtx_code cmp_code = GET_CODE (operands[0]);
   bool flag_check_ne = true;
 
-  /* The RTL may receive an immediate in argument 1 of the compare, this is not
-     supported unless we have l.sf*i instructions, force them into registers.  */
-  if (!TARGET_SFIMM)
-    XEXP (operands[0], 1) = force_reg (SImode, XEXP (operands[0], 1));
+  /* Integer RTL may receive an immediate in argument 1 of the compare, this is
+     not supported unless we have l.sf*i instructions, force them into
+     registers.  */
+  if (!TARGET_SFIMM && CONST_INT_P (righthand_op))
+    XEXP (operands[0], 1) = force_reg (SImode, righthand_op);
 
   /* Normalize comparison operators to ones OpenRISC support.  */
   switch (cmp_code)
-- 
2.21.0