Add precision.frag test.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@20333 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/precision.frag

+#version 100
+
+varying vec3 color;
+
+lowp vec2 foo(mediump vec3 mv3)
+{
+    highp vec4 hv4;
+    return hv4.xy;
+}
+
+int global_medium;
+
+precision highp int;
+
+int global_high;
+
+void main()
+{
+    lowp int sum = global_medium + global_high;
+
+    gl_FragColor = vec4(color, 1.0f);
+
+    int level1_high;
+    sum += level1_high;
+
+    precision lowp int;
+    int level1_low;
+    sum += level1_low;
+
+    {
+        int level2_low;
+        sum += level2_low;
+        
+        precision highp int;
+        int level2_high;
+        sum += level2_high;
+        do {
+            if (1) {
+                precision mediump int;
+                int level4_medium;
+                sum += level4_medium;
+            }
+            int level3_high;
+            sum += level3_high;
+        } while (1);	
+        int level2_high2;
+        sum += level2_high2;
+    }
+    int level1_low3;
+    sum += level1_low3;
+}

Test/testlist

@@ -9,3 +9,4 @@ versionsErrors.vert
 120.frag
 130.frag
 140.frag
+precision.frag