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.420.geom

@@ -0,0 +1,43 @@
+#version 420 core
+
+layout(triangles) in;
+
+in gl_PerVertex {
+    float gl_PointSize;
+} gl_in[];
+
+out gl_PerVertex {
+    float gl_PointSize;
+};
+
+layout(line_strip) out;
+layout(max_vertices = 127) out;
+layout(invocations = 4) in;
+
+uniform sampler2D s2D;
+in vec2 coord[];
+uniform vec4 v4;
+uniform int i;
+
+void main()
+{
+    float p = gl_in[1].gl_PointSize;
+    gl_PointSize = p;
+    gl_ViewportIndex = 7;
+
+    EmitStreamVertex(1);
+    EndStreamPrimitive(0);
+    EmitVertex();
+    EndPrimitive();
+    int id = gl_InvocationID;
+
+    const ivec2 offsets[5] =
+    {
+        ivec2(0,1),
+        ivec2(1,-2),
+        ivec2(0,3),
+        ivec2(-3,0),
+        ivec2(2,1)
+    };
+    vec4 v = textureGatherOffset(s2D, coord[0], offsets[i].xy);
+}