incomplete offset calculation added

[r13492]

diff --git a/ir/ana/irmemory.c b/ir/ana/irmemory.c
index 03ed6cf..9b3343a 100644 (file)
--- a/ir/ana/irmemory.c
+++ b/ir/ana/irmemory.c
@@ -84,6 +84,25 @@ static ir_node *find_base_adr(ir_node *sel, ir_entity **pEnt) {
        return ptr;
 }  /* find_base_adr */
 
+/**
+ * Check if the address can be decomposed into base PLUS offset.
+ */
+static int has_offset(ir_node *adr, int *offset) {
+       if (is_SymConst(adr)) {
+               *offset = 0;
+               return 1;
+       }
+       if (is_Sel(adr)) {
+               ir_entity *ent = get_Sel_entity(adr);
+               ir_type   *owner = get_entity_owner(ent);
+
+               if (get_type_state(owner) != layout_fixed) {
+                       /* The layout is NOT fixed yet, symbolic evaluation needed */
+               }
+       }
+       return 0;
+}  /* has_offset */
+
 /**
  * Two address expressions have the same base address,
  * check if there offsets are different.
@@ -92,6 +111,10 @@ static ir_node *find_base_adr(ir_node *sel, ir_entity **pEnt) {
  * @param adr2  The second address.
  */
 static ir_alias_relation different_offsets(ir_node *adr1, ir_node *adr2) {
+       int offset1, offset2;
+       if (has_offset(adr1, &offset1) && has_offset(adr2, &offset2)) {
+               /* */
+       }
        return may_alias;
 }  /* different_offsets */