Bug 102387

Summary: Assertion failure with UE4Editor and sb enabled
Product: Mesa Reporter: Gert Wollny <gw.fossdev>
Component: Drivers/Gallium/r600Assignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact: Default DRI bug account <dri-devel>
Severity: normal    
Priority: medium    
Version: git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments: TGSI and byte code of the offending shader

Description Gert Wollny 2017-08-24 12:50:15 UTC 
Created attachment 133745 [details]
TGSI and byte code of the offending  shader

When running UE4Editor (4.17) on BARTS with -opengl3 and mesa (1e696b9) is compiled in debug mode I get the following assertion failure on one shader (attached), that then leads to UE4Editor shutting down: 

  error at : MUL_IEEE     R17.x.5F@R124.x,    R14.x.5F@R124.x, R90.x.22||F@R2.w
   : expected operand value R90.x.22||F@R2.w, gpr contains t39||FP@R2.w
  sb/sb_ra_checker.cpp:46:run: Assertion `sh.errors.empty()' failed.

Sometimes it happens right away, when loading the assets, sometimes I have to load a specific level. I guess it depends on what assets are actually displayed.  

If I disable the assertion then I can use UE4Editor (I still need to add a patch to work around to a problem introduced by another shader that for some bug in UE4 exceeds the limits of the GPRs, but this has nothing to do which this assertion failure).

Best, 
Gert
Comment 1 GitLab Migration User 2019-09-18 19:24:09 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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