Test/hlsl.whileLoop.frag - third_party/glslang - Git at Google

 float4 PixelShaderFunction(float4 input) : COLOR0
 {
     while (any(input != input)) { return input; }
     while (false) ;
     [unroll] while (false) { }
     while ((false)) { }
 }
	float4 PixelShaderFunction(float4 input) : COLOR0
	{
	while (any(input != input)) { return input; }
	while (false) ;
	[unroll] while (false) { }
	while ((false)) { }
	}