show optimisation warnings in ia32 conv/conv opts

The middleend should optimize all these cases, it does so for 99% of
them already. There are just some cases where ands get transformed into
conversions which the middleend doesn't catch yet.

diff --git a/ir/be/ia32/ia32_optimize.c b/ir/be/ia32/ia32_optimize.c
index 274e3f8..2e6ab0d 100644 (file)
--- a/ir/be/ia32/ia32_optimize.c
+++ b/ir/be/ia32/ia32_optimize.c
@@ -1344,6 +1344,7 @@ static void optimize_conv_store(ir_node *node)
        if (get_mode_size_bits(conv_mode) < get_mode_size_bits(store_mode))
                return;
 
+       ir_fprintf(stderr, "Optimisation warning: unoptimized ia32 Store(Conv) (%+F, %+F)\n", node, pred);
        set_irn_n(node, n_ia32_Store_val, get_irn_n(pred, n_ia32_Conv_I2I_val));
        if (get_irn_n_edges(pred_proj) == 0) {
                kill_node(pred_proj);
@@ -1395,6 +1396,7 @@ static void optimize_load_conv(ir_node *node)
        }
 
        /* kill the conv */
+       ir_fprintf(stderr, "Optimisation warning: unoptimized ia32 Conv(Load) (%+F, %+F)\n", node, predpred);
        exchange(node, pred);
 }
 
@@ -1471,6 +1473,7 @@ static void optimize_conv_conv(ir_node *node)
                }
        }
 
+       ir_fprintf(stderr, "Optimisation warning: unoptimized ia32 Conv(Conv) (%+F, %+F)\n", node, pred);
        /* Some user (like Phis) won't be happy if we change the mode. */
        set_irn_mode(result_conv, get_irn_mode(node));