https://bugs.freedesktop.org/show_bug.cgi?id=94445
Bug ID: 94445 Summary: Tonga llvm assert since RegisterCoalescer: Need to check DstReg+SrcReg for missing undef flags Product: Mesa Version: git Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/radeonsi Assignee: dri-devel@lists.freedesktop.org Reporter: adf.lists@gmail.com QA Contact: dri-devel@lists.freedesktop.org
R9285 since llvm commit
commit 817178adc78bbd36ba635d3147cca53070558def Author: Matthias Braun matze@braunis.de Date: Sat Mar 5 04:36:10 2016 +0000
RegisterCoalescer: Need to check DstReg+SrcReg for missing undef flags
copy coalescing with enabled subregister liveness can reveal undef uses, previously this was only checked for the SrcReg in updateRegDefsUses() but we need to check DstReg as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262767 91177308-0d34-0410-b5e6-96231b3b80d8
Unigine Valley will assert at start of rendering.
valley_x64: /mnt/sdb1/Gits/llvm/lib/CodeGen/MachineScheduler.cpp:1046: void llvm::ScheduleDAGMILive::updatePressureDiffs(llvm::ArrayRefllvm::RegisterMaskPair): Assertion `VNI && "No live value at use."' failed.
Other demos don't trigger this.
Valley is running 1920x1080 fullscreen ultra quality + 8x AA.