GLSL compiler rejects valid input program

[ADona4]

I find that the following (valid) piece of GLSL is rejected by then Intel GLSL front-end:

# version 150

void foo() {

vec4 temp = -(mat3x4(0.0)*vec3(0.0));

}

I get this error:

ERROR: 0:4: '' : unary '-' not allowed for provided data type

Interestingly, if I rewrite the code like this:

# version 150

void foo() {

vec4 temp = (mat3x4(0.0)*vec3(0.0));

temp = -temp;

}

then it is accepted by the front end.

I have an Intel(R) HD Graphics 520 GPU, and I am running driver version 20.19.15.4326 (18/11/2015).

Can others reproduce this, and do you agree that it is a compiler bug?

[Stefan3D]

I can confirm that with HD5500/v4364

NVIDIA compiler accepts it (it's sloppier in general)

Try this:

vec4 temp = -1.0 * (mat3x4(0.0)*vec3(0.0));

[ADona4]

Thanks for confirming that you can reproduce this.

Even if the NVIDIA compiler is sloppier in general, it seems that the Intel compiler is wrong in this instance, agreed?

[Bryce__Intel · Accepted solution]

Moved discussion to Intel Developer Zone - Developing Games & Graphics on Intel

[https://software.intel.com/en-us/forums/developing-games-and-graphics-on-intel/topic/607206 https://software.intel.com/en-us/forums/developing-games-and-graphics-on-intel/topic/607206]