https://bugs.freedesktop.org/show_bug.cgi?id=102387

Bug ID: 102387 Summary: Assertion failure with UE4Editor and sb enabled Product: Mesa Version: git Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/r600 Assignee: dri-devel@lists.freedesktop.org Reporter: gw.fossdev@gmail.com QA Contact: dri-devel@lists.freedesktop.org

Created attachment 133745 --> https://bugs.freedesktop.org/attachment.cgi?id=133745&action=edit TGSI and byte code of the buggy 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