More fixes to access and buffer compilation.

test/codegen/arithmetic_parens.golden

@@ -0,0 +1,6 @@
+void vs_main()
+{
+    float2 v;
+    v.x = (2.0f + ((4.0f - 2.0f) * 1.5f)) * 3.0f;
+}
+

test/codegen/assign_arithmetic_expression.golden

@@ -1,5 +1,5 @@
 void vs_main()
 {
-    float x = (2.0f + 5.0f);
+    float x = 2.0f + 5.0f;
 }
 

test/codegen/builtin_types.golden

@@ -21,8 +21,8 @@ void vs_main()
     v4 = float4(2.0f, 2.0f, 2.0f, 2.0f);
     v2.x = 2.0f;
     v2.y = 2.0f;
-    float p = (v2.x + v3.z);
-    float q = (v4.w + v2.x);
+    float p = v2.x + v3.z;
+    float q = v4.w + v2.x;
     float4x4 m;
 }
 

test/codegen/complicated_computation.golden

@@ -2,6 +2,6 @@ void vs_main()
 {
     float x = 5.0f;
     float y = 3000.0f;
-    float z = ((y * y) + x);
+    float z = (y * y) + x;
 }
 

test/codegen/multiple_functions.golden

@@ -8,7 +8,7 @@ int foo()
 
 float bar()
 {
-    return (1235.0f * 500);
+    return 1235.0f * 500;
 }
 
 void vs_main()

test/codegen/pass_and_access_struct_fields_in_functions.golden

@@ -7,7 +7,7 @@ struct Foo
 
 float foo(Foo f)
 {
-    return (f.some_data * 2.0f);
+    return f.some_data * 2.0f;
 }
 
 void vs_main()