From 1460ad1da5f294ea77e2e737b5523627b12104c3 Mon Sep 17 00:00:00 2001
From: Teddy <ted.sybil@gmail.com>
Date: Fri, 18 Apr 2014 15:32:58 +0800
Subject: ...

---
 semantics.c | 56 ++++++++++++++++++++++++++------------------------------
 1 file changed, 26 insertions(+), 30 deletions(-)

diff --git a/semantics.c b/semantics.c
index 127783d..106c14d 100644
--- a/semantics.c
+++ b/semantics.c
@@ -855,12 +855,6 @@ ExpType exp_check_add(ExpType op1, ExpType op2, CNode *p, char kind) {
         ERROR((p, "invalid use of undefined type"));
     if (t2 == CPTR && calc_size(op2.type->rec.ref) == -1)
         ERROR((p, "invalid use of undefined type"));
-    if (t1 == CARR)
-    {
-        CType_t ptr = ctype_create("", CPTR, NULL);
-        ptr->rec.ref = op1.type->rec.arr.elem;
-        op1.type = ptr;
-    }
     if (kind == '-')
     {
         if (IS_PTR(t2) && !IS_PTR(t1))
@@ -871,32 +865,31 @@ ExpType exp_check_add(ExpType op1, ExpType op2, CNode *p, char kind) {
         if (!((IS_INT(t1) || IS_PTR(t1)) && IS_INT(t2)))
             ERROR((p, "invalid operands to binary operator"));
     }
-    if ((p->ext.is_const = rch->ext.is_const))
+    if ((p->ext.is_const = lch->ext.is_const && rch->ext.is_const))
     {
-        int r = rch->ext.const_val;
-        if (IS_PTR(t1))
+        int r = rch->ext.const_val,
+            *a = &(p->ext.const_val);
+        if (t1 == CARR)
         {
+            int l = p->chd->ext.offest;
             CType_t type;
             p->ext.var = p->chd->ext.var;
             if (t1 == CPTR) type = op1.type->rec.ref;
             else type = op1.type->rec.arr.elem;
-            p->ext.offest = p->chd->ext.offest + calc_size(type) * r;
-        }
-        if ((p->ext.is_const &= lch->ext.is_const))
-        {
-            int l = lch->ext.const_val,
-                *a = &(p->ext.const_val);
-            if (IS_PTR(t1))
+            r *= calc_size(type);
+            switch (kind)
             {
-                /* TODO: const pointer */
+                case '+': p->ext.offest = l + r; break;
+                case '-': p->ext.offest = l - r; break;
             }
-            else
+        }
+        else
+        {
+            int l = lch->ext.const_val;
+            switch (kind)
             {
-                switch (kind)
-                {
-                    case '+': *a = l + r; break;
-                    case '-': *a = l - r; break;
-                }
+                case '+': *a = l + r; break;
+                case '-': *a = l - r; break;
             }
         }
     }
@@ -1077,17 +1070,20 @@ ExpType exp_check_postfix(CNode *p, CScope_t scope) {
             t2 = op2.type->type;
             if (!IS_INT(t2))
                 ERROR((p, "array subscript is not an integer"));
+            p->ext.is_const = 0;
             if (t1 == CARR)
+            {
                 op1.type = op1.type->rec.arr.elem;
+                if ((p->ext.is_const = p->chd->ext.is_const && \
+                                        post->chd->ext.is_const))
+                {
+                    p->ext.offest = p->chd->ext.offest + \
+                                    calc_size(op1.type) * post->chd->ext.const_val;
+                    p->ext.var = p->chd->ext.var;
+                }
+            }
             else
                 op1.type = op1.type->rec.ref;
-            if (post->chd->ext.is_const)
-            {
-                p->ext.offest = p->chd->ext.offest + \
-                                calc_size(op1.type) * post->chd->ext.const_val;
-                p->ext.var = p->chd->ext.var;
-            }
-            p->ext.is_const = 0;
             op1.lval = 1;
             break;
         case POSTFIX_CALL:
-- 
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