fixed optimize_conv_conv(): when the result is 8bit, we must change the opcode AND...

[r15569]

diff --git a/ir/be/ia32/ia32_optimize.c b/ir/be/ia32/ia32_optimize.c
index e5790fb..529ca5d 100644 (file)
--- a/ir/be/ia32/ia32_optimize.c
+++ b/ir/be/ia32/ia32_optimize.c
@@ -1189,6 +1189,12 @@ static void optimize_conv_conv(ir_node *node)
                if(get_irn_n_edges(pred_proj) == 1) {
                        result_conv = pred_proj;
                        set_ia32_ls_mode(pred, conv_mode);
+
+                       /* Argh:We must change the opcode to 8bit AND copy the register constraints */
+                       if (get_mode_size_bits(conv_mode) == 8) {
+                               set_irn_op(pred, op_ia32_Conv_I2I8Bit);
+                               set_ia32_in_req_all(pred, get_ia32_in_req_all(node));
+                       }
                } else {
                        /* TODO: construct syncs/stuff here but we'll probably end up with
                         * 2 statements anyway */
@@ -1198,6 +1204,12 @@ static void optimize_conv_conv(ir_node *node)
 
                        result_conv = exact_copy(pred);
                        set_ia32_ls_mode(result_conv, conv_mode);
+
+                       /* Argh:We must change the opcode to 8bit AND copy the register constraints */
+                       if (get_mode_size_bits(conv_mode) == 8) {
+                               set_irn_op(result_conv, op_ia32_Conv_I2I8Bit);
+                               set_ia32_in_req_all(result_conv, get_ia32_in_req_all(node));
+                       }
                }
        } else {
                /* if both convs have the same sign, then we can take the smaller one */