Bug 94302

Summary:	webgl conformance/glsl/bugs/temp-expressions-should-not-crash.html takes a very long time with Intel driver
Product:	Mesa	Reporter:	Yang Gu <yang.gu>
Component:	Drivers/DRI/i965	Assignee:	Ian Romanick <idr>
Status:	RESOLVED DUPLICATE	QA Contact:	Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity:	normal
Priority:	medium	CC:	xinghua.cao, yang.gu
Version:	git
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Yang Gu 2016-02-26 08:36:30 UTC

Test devices:
NV Desktop - Desktop with NVidia GeForce GTX750 Ti
GEN Desktop - BDW desktop with Intel GEN GFX. Mesa is git ToT (11.3.0)
Pixel 2013 - IVB Chromebook, Mesa version 11.0.2
Acer C720 - HSW Chromebook, Mesa version 11.0.2
Acer C910 - BDW Chromebook, Mesa version 11.0.2

This case crashed on all Chromebooks, and passed on NV Desktop and GEN Desktop. Though it can pass on GEN Desktop, it took quite a long time (7 minutes) to finish. While on NV Desktop, it just took no more than 1 second.

Steps to reproduce:
1. Launch Chrome browser on Linux with GEN graphics, and open https://www.khronos.org/registry/webgl/sdk/tests/conformance/glsl/bugs/temp-expressions-should-not-crash.html

2. The case will take a very long time to finish, and on my machine, it's about 7 minutes.

Comment 1 Kenneth Graunke 2016-02-27 00:22:12 UTC

This test does indeed take way too long.

Disabling the GLSL IR optimization passes opt_copy_propagation and opt_copy_propagation_elements brings it down to about 8 seconds on a release build.

Comment 2 Martina Kollarova 2016-04-11 14:01:07 UTC


*** This bug has been marked as a duplicate of bug 94477 ***

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