glslang SPV tests: Add a set of SPV tests.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@31212 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/spv.functionSemantics.frag

@@ -0,0 +1,63 @@
+#version 400
+
+uniform float u;
+
+int foo(int a, const int b, in int c, const in int d, out int e, inout int f)
+{
+    int sum = a + b + c + d + f; // no e, it is out only
+	// sum should be 47 now
+
+	a *= 64;
+	// no b, it is read only
+	c *= 64;
+	// no d, it is read only
+	e = 64 * 16; // e starts undefined
+	f *= 64;
+
+	sum += a + 64 * b + c + 64 * d + e + f; // everything has a value now, totaling of 64(1+2+4+8+16+32) = 64*63 = 4032
+	// sum should be 4032 + 47  = 4079
+	
+	return sum;
+}
+
+int foo2(float a, vec3 b, out int r)
+{
+    r = int(3.0 * a);
+    return int(5.0 * b.y);
+}
+
+int foo3()
+{
+    if (u > 3.2) {
+        discard;
+        return 1000000;
+    }
+
+    return 2000000;
+}
+
+void main()
+{
+    int e;
+	int t = 2;
+	struct s {
+	    ivec4 t;
+	} f;
+	f.t.y = 32;
+
+    // test the different qualifers
+    int color = foo(1, 2, t+t, 8, e, f.t.y);
+
+	color += 128 * (e + f.t.y); // right side should be 128(64(16 + 32)) = 393216
+	// sum should be 4079 + 393216 = 397295
+    
+    // test conversions
+    float arg;
+    float ret;
+    ret = foo2(4, ivec3(1,2,3), arg);  // ret = 10, param = 12.0
+    color += int(ret + arg); // adds 22, for total of 397317
+
+    color += foo3();         // theoretically, add 2000000, for total of 2397317
+
+    gl_FragColor = vec4(color);
+}