remove stray tab

[mesa.git] / src / mesa / shader / slang / slang_vartable.c

diff --git a/src/mesa/shader/slang/slang_vartable.c b/src/mesa/shader/slang/slang_vartable.c
index cd6a081e04bfb1bff5a4ab0d5a1c0cfea5f856d2..6d2b4369d945897cddd65aa93516410b41977c2d 100644 (file)
--- a/src/mesa/shader/slang/slang_vartable.c
+++ b/src/mesa/shader/slang/slang_vartable.c
@@ -3,6 +3,7 @@
 #include "slang_compile.h"
 #include "slang_compile_variable.h"
 #include "slang_vartable.h"
+#include "slang_ir.h"
 
 
 static int dbg = 0;
@@ -31,6 +32,8 @@ struct slang_var_table_
 
 /**
  * Create new table, put at head, return ptr to it.
+ * XXX we should take a maxTemps parameter to indicate how many temporaries
+ * are available for the current shader/program target.
  */
 slang_var_table *
 _slang_push_var_table(slang_var_table *parent)
@@ -58,16 +61,32 @@ _slang_pop_var_table(slang_var_table *t)
 {
    slang_var_table *parent = t->parent;
    int i;
+
    if (dbg) printf("Popping level %d\n", t->level);
+
+   /* free the storage allocated for each variable */
+   for (i = 0; i < t->num_entries; i++) {
+      slang_ir_storage *store = (slang_ir_storage *) t->vars[i]->aux;
+      GLint j, sz4 = (store->Size + 3) / 4;
+      if (dbg) printf("  Free var %s, size %d\n",
+                      (char*) t->vars[i]->a_name, store->Size);
+      for (j = 0; j < sz4; j++) {
+         assert(t->temps[store->Index + j] == VAR);
+         t->temps[store->Index + j] = FREE;
+      }
+      store->Index = -1;
+   }
    if (t->parent) {
+      /* just verify that any remaining allocations in this scope 
+       * were for temps
+       */
       for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {
-         if (t->temps[i] && !t->parent->temps[i])
+         if (t->temps[i] && !t->parent->temps[i]) {
             if (dbg) printf("  Free reg %d\n", i);
+            assert(t->temps[i] == TEMP);
+         }
       }
    }
-   for (i = 0; i < t->num_entries; i++) {
-      if (dbg) printf("  Free var %s\n", (char*) t->vars[i]->a_name);
-   }
 
    if (t->vars)
       free(t->vars);
@@ -84,6 +103,7 @@ void
 _slang_add_variable(slang_var_table *t, slang_variable *v)
 {
    assert(t);
+   if (dbg) printf("Adding var %s\n", (char *) v->a_name);
    t->vars = realloc(t->vars, (t->num_entries + 1) * sizeof(slang_variable *));
    t->vars[t->num_entries] = v;
    t->num_entries++;
@@ -121,7 +141,7 @@ alloc_reg(slang_var_table *t, GLint size, GLboolean isTemp)
    for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {
       GLuint found = 0;
       for (j = 0; j < sz4; j++) {
-         if (!t->temps[i + j]) {
+         if (i + j < MAX_PROGRAM_TEMPS && !t->temps[i + j]) {
             found++;
          }
          else {