Hi,
I am developing a vulkan application and noticed that some shader code that used to work started crashing in vkCreateComputePipelines. Exception thrown at 0x00007FFAA445BDAF (amdvlk64.dll)
The crash occurs when using nonuniformEXT several times in a row with the same index to read from an array of textures, and that index can't be determined at compile time.
This glsl code causes a crash for example:
uint index = buff[0]; // some uniform buffer with some value
vec3 tex0 = textureLod(textureArrayRGBA[nonuniformEXT(index)], uv0, lod).rgb;
vec3 tex1 = textureLod(textureArrayRGBA[nonuniformEXT(index)], uv1, lod).rgb;
These examples work however:
uint index = 0;
vec3 tex0 = textureLod(textureArrayRGBA[nonuniformEXT(index)], uv0, lod).rgb;
vec3 tex1 = textureLod(textureArrayRGBA[nonuniformEXT(index)], uv1, lod).rgb;
uint index = buff[0]; // some uniform buffer
if(some bool not determined at compile time)
tex0 = textureLod(textureArrayRGBA[nonuniformEXT(index)], uv0, lod).rgb;
if(some other bool not determined at compile time)
tex1 = textureLod(textureArrayRGBA[nonuniformEXT(index)], uv1, lod).rgb;
uint index = buff[0]; // some uniform buffer
uint index1 = (index << 1) >> 1; // works as long as you don't care about the last bit
vec3 tex0 = textureLod(textureArrayRGBA[nonuniformEXT(index)], uv0, lod).rgb;
vec3 tex1 = textureLod(textureArrayRGBA[nonuniformEXT(index1)], uv1, lod).rgb;
This crash occurs on rx 5700 xt and 5500 xt with both the newest recommended driver (20.11.2) and the newest optional (20.12.1). It does not occur on vega 64 with the same drivers or on older drivers.
If optimization is turned off when creating the pipeline by using the flag VK_PIPELINE_CREATE_DISABLE_OPTIMIZATION_BIT then this crash does not occur either.
