values may die at every use

[libfirm] / ir / be / benode.c

diff --git a/ir/be/benode.c b/ir/be/benode.c
index 5c609fd..3cc8b42 100644 (file)
--- a/ir/be/benode.c
+++ b/ir/be/benode.c
@@ -32,6 +32,7 @@
 #include "ircons_t.h"
 #include "irprintf.h"
 #include "irgwalk.h"
+#include "iropt_t.h"
 
 #include "be_t.h"
 #include "belive_t.h"
@@ -158,6 +159,40 @@ static const ir_op_ops be_node_op_ops;
 #define M   irop_flag_machine
 
 
+/**
+ * Compare two node attributes.
+ *
+ * @return zero if both attributes are identically
+ */
+static int cmp_node_attr(be_node_attr_t *a, be_node_attr_t *b) {
+       if (a->max_reg_data == b->max_reg_data) {
+               int i;
+
+               for (i = 0; i < a->max_reg_data; ++i) {
+                       if (a->reg_data[i].reg    != b->reg_data[i].reg ||
+                           memcmp(&a->reg_data[i].in_req, &b->reg_data[i].in_req, sizeof(b->reg_data[i].in_req)) ||
+                           memcmp(&a->reg_data[i].req,    &b->reg_data[i].req,    sizeof(a->reg_data[i].req)))
+                               return 1;
+               }
+               return 0;
+       }
+       return 1;
+}
+
+/**
+ * Compare the attributes of two FrameAddr nodes.
+ *
+ * @return zero if both attributes are identically
+ */
+static int FrameAddr_cmp_attr(ir_node *a, ir_node *b) {
+       be_frame_attr_t *a_attr = get_irn_attr(a);
+       be_frame_attr_t *b_attr = get_irn_attr(b);
+
+       if (a_attr->ent == b_attr->ent && a_attr->offset == b_attr->offset)
+               return cmp_node_attr(&a_attr->node_attr, &b_attr->node_attr);
+       return 1;
+}
+
 void be_node_init(void) {
        static int inited = 0;
 
@@ -182,7 +217,7 @@ void be_node_init(void) {
        op_be_IncSP      = new_ir_op(beo_base + beo_IncSP,      "be_IncSP",      op_pin_state_pinned,     N, oparity_binary,   0, sizeof(be_stack_attr_t),  &be_node_op_ops);
        op_be_RegParams  = new_ir_op(beo_base + beo_RegParams,  "be_RegParams",  op_pin_state_pinned,     N, oparity_zero,     0, sizeof(be_node_attr_t),   &be_node_op_ops);
        op_be_StackParam = new_ir_op(beo_base + beo_StackParam, "be_StackParam", op_pin_state_pinned,     N, oparity_unary,    0, sizeof(be_frame_attr_t),  &be_node_op_ops);
-       op_be_FrameAddr  = new_ir_op(beo_base + beo_FrameAddr,  "be_FrameAddr",  op_pin_state_pinned,     N, oparity_binary,   0, sizeof(be_frame_attr_t),  &be_node_op_ops);
+       op_be_FrameAddr  = new_ir_op(beo_base + beo_FrameAddr,  "be_FrameAddr",  op_pin_state_pinned,     N, oparity_unary,    0, sizeof(be_frame_attr_t),  &be_node_op_ops);
        op_be_FrameLoad  = new_ir_op(beo_base + beo_FrameLoad,  "be_FrameLoad",  op_pin_state_pinned,     N, oparity_any,      0, sizeof(be_frame_attr_t),  &be_node_op_ops);
        op_be_FrameStore = new_ir_op(beo_base + beo_FrameStore, "be_FrameStore", op_pin_state_pinned,     N, oparity_any,      0, sizeof(be_frame_attr_t),  &be_node_op_ops);
        op_be_Barrier    = new_ir_op(beo_base + beo_Barrier,    "be_Barrier",    op_pin_state_pinned,     N, oparity_any,      0, sizeof(be_node_attr_t),   &be_node_op_ops);
@@ -204,6 +239,8 @@ void be_node_init(void) {
        set_op_tag(op_be_FrameStore, &be_node_tag);
        set_op_tag(op_be_FrameAddr,  &be_node_tag);
        set_op_tag(op_be_Barrier,    &be_node_tag);
+
+       op_be_FrameAddr->ops.node_cmp_attr = FrameAddr_cmp_attr;
 }
 
 /**
@@ -579,7 +616,8 @@ ir_node *be_new_FrameAddr(const arch_register_class_t *cls_frame, ir_graph *irg,
        a->offset = 0;
        be_node_set_reg_class(irn, 0, cls_frame);
        be_node_set_reg_class(irn, OUT_POS(0), cls_frame);
-       return irn;
+
+       return optimize_node(irn);
 }
 
 ir_node *be_new_CopyKeep(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, ir_node *src, int n, ir_node *in_keep[], ir_mode *mode)
@@ -605,6 +643,14 @@ ir_node *be_new_CopyKeep_single(const arch_register_class_t *cls, ir_graph *irg,
        return be_new_CopyKeep(cls, irg, bl, src, 1, in, mode);
 }
 
+ir_node *be_get_CopyKeep_op(const ir_node *cpy) {
+       return get_irn_n(cpy, be_pos_CopyKeep_op);
+}
+
+void be_set_CopyKeep_op(ir_node *cpy, ir_node *op) {
+       set_irn_n(cpy, be_pos_CopyKeep_op, op);
+}
+
 ir_node *be_new_Barrier(ir_graph *irg, ir_node *bl, int n, ir_node *in[])
 {
        ir_node *irn;
@@ -886,7 +932,9 @@ ir_node *be_spill(const arch_env_t *arch_env, ir_node *irn, ir_node *ctx)
        const arch_register_class_t *cls_frame = arch_get_irn_reg_class(arch_env, frame, -1);
 
        spill = be_new_Spill(cls, cls_frame, irg, bl, frame, irn, ctx);
+       return spill;
 
+#if 0
        /*
         * search the right insertion point. a spill of a phi cannot be put
         * directly after the phi, if there are some phis behind the one which
@@ -908,6 +956,7 @@ ir_node *be_spill(const arch_env_t *arch_env, ir_node *irn, ir_node *ctx)
 
        sched_add_before(insert, spill);
        return spill;
+#endif
 }
 
 ir_node *be_reload(const arch_env_t *arch_env, const arch_register_class_t *cls, ir_node *insert, ir_mode *mode, ir_node *spill)
@@ -1268,6 +1317,7 @@ static void dump_node_req(FILE *f, int idx, be_req_t *req)
        const char *prefix = buf;
 
        snprintf(buf, sizeof(buf), "#%d ", idx);
+       buf[sizeof(buf) - 1] = '\0';
 
        if(req->flags != arch_irn_flags_none) {
                fprintf(f, "%sflags: ", prefix);