Bug 110311

Summary:	[IVB HSW SNB][regression][bisected] regressions on vec4 deqp/gl{es}cts tests
Product:	Mesa	Reporter:	Clayton Craft <clayton.a.craft>
Component:	Drivers/DRI/i965	Assignee:	Timothy Arceri <t_arceri>
Status:	RESOLVED FIXED	QA Contact:	Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity:	normal
Priority:	medium	Keywords:	bisected, regression
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Clayton Craft 2019-04-03 00:25:17 UTC

The following tests regressed on SNB, IVB, and HSW:

KHR-GL46.shaders.loops.do_while_constant_iterations.mixed_break_continue_vertex
KHR-GLES3.shaders.loops.do_while_constant_iterations.mixed_break_continue_vertex
dEQP-GLES3.functional.shaders.loops.do_while_constant_iterations.mixed_break_continue_vertex

This has been bisected to this commit:

commit 4218b6422cf1ff70c7f0feeec699a35e88522ed7
Author: Timothy Arceri <tarceri@itsqueeze.com>
Date:   Fri Nov 23 11:49:19 2018 +1100

    nir: propagate known constant values into the if-then branch

Comment 1 Timothy Arceri 2019-04-03 02:25:47 UTC

I've reverted this for now. The fix is going to be more complex than I first thought.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.