https://bugs.freedesktop.org/show_bug.cgi?id=36753

Summary: Some textures now rendered as completely black after register allocator rewrite. Product: Mesa Version: git Platform: x86 (IA32) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/r300 AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: rankincj@googlemail.com

Running World of Warcraft on my M66GL (RV530), and some textures are now rendered as completely black. However, my RV350 is unaffected.

git bisect says:

fe622bac0c1b5b9f2a9fcf9f35b51232a06bea42 is the first bad commit commit fe622bac0c1b5b9f2a9fcf9f35b51232a06bea42 Author: Tom Stellard tstellar@gmail.com Date: Tue Jan 11 00:05:08 2011 -0800

r300/compiler: Rewrite register allocator

The new allocator uses ra and does swizzle packing.

Also, a data structure (struct rc_variable) and associated functions have been added for generating UD and DU chains.

:040000 040000 545a13a6577705511d30b471d6901237e793679c f27924a4a5a40bab284ea7c03facab6c69875fb9 M src

The following error messages are written to the output log:

r300 FP: Compiler Error: Rewrite of inst 10 failed Can't allocate source for Inst 13 src_type=1 new_index=2 new_mask=1 Using a dummy shader instead. r300 FP: Compiler Error: Rewrite of inst 14 failed Can't allocate source for Inst 17 src_type=1 new_index=2 new_mask=1 Using a dummy shader instead.