Support extension EXT_shader_quad_control

Test/spv.1.6.quad.frag

@@ -0,0 +1,21 @@
+#version 460 core
+#extension GL_KHR_shader_subgroup_basic: require
+#extension GL_EXT_shader_quad_control: require
+#extension GL_KHR_shader_subgroup_vote: require
+
+layout (full_quads) in;
+layout (quad_derivatives) in;
+
+flat in int iInput;
+
+out int bOut;
+
+
+void main(){
+    bool bTemp = false;
+
+    // EXT_shader_quad_control required begin
+    bTemp  = bTemp || subgroupQuadAll(iInput > 0);                      // GL_KHR_shader_subgroup_vote
+    bTemp  = bTemp || subgroupQuadAny(iInput > 0);                      // GL_KHR_shader_subgroup_vote
+    bOut = bTemp == true ? 1 : 0;
+}