Bug 46005

Summary:	[r300g, bisected] piglit glsl-vs-loop-redundant-condition fails
Product:	Mesa	Reporter:	Pavel Ondračka <pavel.ondracka>
Component:	Drivers/Gallium/r300	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium	CC:	bryancain3+fdo
Version:	git	Keywords:	regression
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Pavel Ondračka 2012-02-13 11:13:19 UTC

piglit glsl-vs-loop-redundant-condition fails with: 
r300 VP: Compiler error:
Failed to build loop info
Using a dummy shader instead.

8c31bc704826d46cad65c4d65b4b70de7144205a is the first bad commit
commit 8c31bc704826d46cad65c4d65b4b70de7144205a
Author: Bryan Cain <bryancain3@gmail.com>
Date:   Wed Aug 17 10:01:30 2011 -0500

    glsl_to_tgsi: implement ir_unop_logic_not using 1-x
    
    Since our logic values are 0.0 (false) and 1.0 (true), 1.0 - x accurately
    implements logical not.
    
    This is a port of commit 6ad08989d7c1 to glsl_to_tgsi.

GPU: RV530
Mesa: df1cd55ebf362948788c04d2fa7da55c80991605
Kernel: 3.2.3
Libdrm: 2.4.31

Comment 1 Tom Stellard 2012-02-13 18:51:03 UTC

This is a r300 compiler bug.  Flow control doesn't work very well for vertex shaders at the moment.  I have been slowly working on fixing this, but I'm not quite done yet.

Comment 2 Tom Stellard 2012-04-13 19:34:15 UTC

Fixed in git commit b2df031a959f36743527b9abc89913ce4f895de3

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