bgfx/3rdparty/glsl-optimizer/tests/fragment/builtin-vars-inES3.txt

#version 300 es
out mediump vec4 _fragData;

in mediump vec4 uv;

void main()
{
	mediump vec4 c;
	c = uv;
	c += gl_FragCoord;
	c.x += gl_FrontFacing ? 1.0 : 0.0;
	c.xy += gl_PointCoord;
	_fragData = c;
}