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The files associated with the bug are here:
System Setup Information:
-----------------------------------------
System Used: Dell XPS
CPU SKU: i7
GPU SKU: HD 520
Processor Line: U-Series
System BIOS Version: Dell Inc. 1.0.0, 10/09/2015
CMOS settings: I can check on request
Graphics Driver Version: 20.19.15.4501
GOP/VBIOS Version: Intel Video BIOS
Operating System: Windows 10
OS Version: Pro
API: WebGL 1.0 (OpenGL ES 2.0 Chromium), WebGL vendor: Google Inc., WebGL renderer: ANGLE (Intel(R) HD Graphics 520 Direct3D11 vs_5_0 ps_5_0), broswer version: Google Chrome Version 54.0.2840.99 m (64-bit)
Occurs on non-Intel GPUs?: Haven't tried
Steps to Reproduce:
-------------------------------
1. Open the Chrome browser
2. Navigate to http://htmlpreview.github.io/?https://github.com/mc-imperial/shader-compiler-bugs/blob/master/utils/webgl/webgl_viewer.html
3. Paste the contents of original.frag into the text box
4. Click "Execute"; the rendered image is the expected image for this shader, and should look like original.png
5. Paste the contents of variant.frag into the text box
6. Click "Execute"; you should find that the rendered image is significantly different from the expected image rendered previously
Expected Results:
-------------------------------
Both shaders should render an image that looks like original.png. This is because the only difference between the .frag files is:
- There is a "discard" statement after a "break" statement in
variant.frag; because the "discard" statement is unreachable code,
this should have no effect on computation.
Actual Results:
-------------------------------
The shaders render significantly different images, which they should not.
Additional Information:
-------------------------------
N/A
Link Copied
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I had meant to post this under here:
https://software.intel.com/en-us/forums/graphics-driver-bug-reporting
Is it possible for it to be moved there?
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Hi Alastair,
Can you see if the issue reproduces on this new driver?
https://downloadcenter.intel.com/download/26404/Intel-Graphics-Driver-15-45-
I will move this to the sub forum for you.
-Michael
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Hi Michael
Yes, this does reproduce under the new driver. The symptoms are a little different, but having the "discard" after the break or not completely changes what is rendered.
I'd be interested to know what the issue is.
Thanks
Ally
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Thanks! I have the ticket filed and will the driver team to investigate.
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