Initial bits to process initializers in variable declarations

As a result, the following tests pass:

    glslparsertest/array3.frag
    glslparsertest/CGStandardLibrary.frag
    glslparsertest/ConstantConversions.frag
    glslparsertest/constructor1.frag
    glslparsertest/constructor2.frag
    glslparsertest/constructor3.V110.frag
    glslparsertest/dataType4.frag
    glslparsertest/dataType5.frag
    glslparsertest/dataType13.frag
    glslparsertest/dataType19.frag
    glslparsertest/matrix.V110.frag
    glslparsertest/parser7.frag
    glslparsertest/swizzle3.frag

The following tests also pass, but it is just by dumb luck.  In these
cases the shader fails to compile, but it fails for the wrong reason:

    glslparsertest/array6.frag
    glslparsertest/comma2.frag
    glslparsertest/conditional1.frag
    glslparsertest/conditional2.frag
    glslparsertest/conditional3.frag
    glslparsertest/constFunc.frag
    glslparsertest/ParseTest3.frag
    glslparsertest/ParseTest4.frag
    glslparsertest/varying3.frag
    glslparsertest/parser8.frag (also segfaults)
    glslparsertest/parser9.frag (also segfaults)

The following tests now fail.  As far as I can tell, these are all
cases where the shader was failing to compile, but it was failing for
the wrong reason.

    glslparsertest/CorrectMatComma.frag
    glslparsertest/CorrectModule.frag
    glslparsertest/CorrectSwizzle2.vert
    glslparsertest/shaders/glsl-fs-bug25902.frag

ast_to_hir.cpp

@@ -980,22 +980,33 @@ ast_declarator_list::hir(exec_list *instructions,
 
       instructions->push_tail(var);
 
-      /* From page 24 (page 30 of the PDF) of the GLSL 1.10 spec:
-       *
-       *    "All uniform variables are read-only and are initialized either
-       *    directly by an application via API commands, or indirectly by
-       *    OpenGL."
-       */
-      if ((state->language_version <= 110)
-	  && (var->mode == ir_var_uniform)
-	  && (decl->initializer != NULL)) {
-	 YYLTYPE loc = decl->initializer->get_location();
+      if (decl->initializer != NULL) {
+	 /* From page 24 (page 30 of the PDF) of the GLSL 1.10 spec:
+	  *
+	  *    "All uniform variables are read-only and are initialized either
+	  *    directly by an application via API commands, or indirectly by
+	  *    OpenGL."
+	  */
+	 if ((state->language_version <= 110)
+	     && (var->mode == ir_var_uniform)) {
+	    YYLTYPE loc = decl->initializer->get_location();
 
-	 _mesa_glsl_error(& loc, state, "uniform initializers forbidden in "
-			  "GLSL 1.10");
-      }
+	    _mesa_glsl_error(& loc, state, "uniform initializers forbidden in "
+			     "GLSL 1.10");
+	 }
+
+	 ir_dereference *const lhs = new ir_dereference(var);
+	 ir_rvalue *const rhs = decl->initializer->hir(instructions, state);
 
-      /* FINISHME: Process the declaration initializer. */
+	 /* FINISHME: If the declaration is either 'const' or 'uniform', the
+	  * FINISHME: initializer (rhs) must be a constant expression.
+	  */
+
+	 if (!rhs->type->is_error()) {
+	    (void) do_assignment(instructions, state, lhs, rhs,
+				 this->get_location());
+	 }
+      }
    }
 
    /* Variable declarations do not have r-values.