[Qemu-devel] [PATCH for-4.0 v2 37/37] tcg/i386: Remove L constraint

[Richard Henderson]

We no longer need any scratch registers for user-only memory ops.

Signed-off-by: Richard Henderson <address@hidden>
---
 tcg/i386/tcg-target.inc.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/tcg/i386/tcg-target.inc.c b/tcg/i386/tcg-target.inc.c
index 19a0fa8a03..2815dd25a0 100644
--- a/tcg/i386/tcg-target.inc.c
+++ b/tcg/i386/tcg-target.inc.c
@@ -240,10 +240,7 @@ static const char *constrain_memop_arg(QemuMemArgType 
type, bool is_64, int hi)
 #else
 static const char *constrain_memop_arg(QemuMemArgType type, bool is_64, int hi)
 {
-    if (TCG_TARGET_REG_BITS == 64) {
-        /* Temps are still needed for guest_base && !guest_base_flags.  */
-        return "L";
-    } else if (type == ARG_STVAL && !is_64) {
+    if (TCG_TARGET_REG_BITS == 32 && type == ARG_STVAL && !is_64) {
         /* Byte stores must happen from q-regs.  Because of this, we must
          * constrain all INDEX_op_qemu_st_i32 to use q-regs.
          */
@@ -353,14 +350,6 @@ static const char 
*target_parse_constraint(TCGArgConstraint *ct,
         ct->u.regs |= ALL_VECTOR_REGS;
         break;
 
-        /* qemu_ld/st address constraint */
-    case 'L':
-        ct->ct |= TCG_CT_REG;
-        ct->u.regs = TCG_TARGET_REG_BITS == 64 ? 0xffff : 0xff;
-        tcg_regset_reset_reg(ct->u.regs, TCG_REG_L0);
-        tcg_regset_reset_reg(ct->u.regs, TCG_REG_L1);
-        break;
-
     case 'e':
         ct->ct |= (type == TCG_TYPE_I32 ? TCG_CT_CONST : TCG_CT_CONST_S32);
         break;
-- 
2.17.2