Created attachment 109335 [details] backtrace Trying to play Massive Chalice (http://store.steampowered.com/app/246110/), it crashes on startup after the logos. My video card is Radeon HD 7770 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X] Running Fedora 21, 64bit. When it crashes, I can see this in the terminal: LLVM ERROR: Cannot select: 0xdd82a2cc: i32 = truncate 0xdd818230 [ORD=47] [ID=184] 0xdd818230: i128 = srl 0xdd81cc14, 0xdd81cca0 [ORD=47] [ID=164] 0xdd81cc14: i128 = bitcast 0xdd81b6f4 [ORD=47] [ID=150] 0xdd81b6f4: v4i32,ch = load 0xe02affdc, 0xdd817f74, 0xdd8189d8<LD16[%54](tbaa=!"const")> [ORD=34] [ID=119] 0xdd817f74: i64,ch = CopyFromReg 0xe02affdc, 0xdd817ee8 [ID=110] 0xdd817ee8: i64 = Register %vreg111 [ID=2] 0xdd8189d8: i64 = undef [ID=8] 0xdd81cca0: i32 = Constant<64> [ID=107] In function: main ERROR: Passed a NULL mutex ERROR: Passed a NULL mutex Installed mesa packages: mesa-libEGL-10.3.3-1.20141110.fc21.i686 mesa-libxatracker-10.3.3-1.20141110.fc21.x86_64 mesa-dri-drivers-10.3.3-1.20141110.fc21.x86_64 mesa-libGL-devel-10.3.3-1.20141110.fc21.x86_64 mesa-libglapi-10.3.3-1.20141110.fc21.i686 mesa-libGLES-10.3.3-1.20141110.fc21.x86_64 mesa-filesystem-10.3.3-1.20141110.fc21.x86_64 mesa-libgbm-devel-10.3.3-1.20141110.fc21.x86_64 mesa-demos-8.2.0-2.fc21.x86_64 mesa-libEGL-devel-10.3.3-1.20141110.fc21.x86_64 mesa-libGLU-9.0.0-7.fc21.i686 mesa-libwayland-egl-devel-10.3.3-1.20141110.fc21.x86_64 mesa-libGLU-9.0.0-7.fc21.x86_64 mesa-libwayland-egl-10.3.3-1.20141110.fc21.x86_64 mesa-dri-drivers-10.3.3-1.20141110.fc21.i686 mesa-libEGL-10.3.3-1.20141110.fc21.x86_64 mesa-libgbm-10.3.3-1.20141110.fc21.i686 mesa-libglapi-10.3.3-1.20141110.fc21.x86_64 mesa-libOpenCL-10.3.3-1.20141110.fc21.x86_64 mesa-vdpau-drivers-10.3.3-1.20141110.fc21.x86_64 mesa-libGLES-devel-10.3.3-1.20141110.fc21.x86_64 mesa-filesystem-10.3.3-1.20141110.fc21.i686 mesa-libGL-10.3.3-1.20141110.fc21.x86_64 mesa-libgbm-10.3.3-1.20141110.fc21.x86_64 mesa-libGL-10.3.3-1.20141110.fc21.i686 mesa-debuginfo-10.3.3-1.20141110.fc21.x86_64 I attached a backtrace of the game that systemd's coredumpctl helpfully generated for me - I tried using gdb to get more info but gdb crashes when processing the coredump. I'm not 100% sure it's a driver bug, but it probably is because it seems the developer tested this on the propritary drivers and it worked for them.
(In reply to Elad Alfassa from comment #0) > LLVM ERROR: Cannot select: 0xdd82a2cc: i32 = truncate 0xdd818230 [ORD=47] > [ID=184] > 0xdd818230: i128 = srl 0xdd81cc14, 0xdd81cca0 [ORD=47] [ID=164] [...] > I'm not 100% sure it's a driver bug, [...] It's most definitely an LLVM R600 backend bug. Please run the game with the environment variable R600_DEBUG=ps , capture its stderr output to a file and attach that file here after the game crashed.
Created attachment 109397 [details] output with R600_DEBUG=ps Attached. I hope this is helpful.
Which version of LLVM are you using? The failing shader seems to compile fine with a current LLVM SVN snapshot (which will in time be released as 3.6).
Elad: You could also try testing llvm 3.5 which is available in updates-testing (https://admin.fedoraproject.org/updates/gambas3-3.6.1-2.fc21,julia-0.3.3-2.fc21,llvm-3.5.0-4.fc21,mesa-10.4.0-1.20141214.fc21,pocl-0.10-2.fc21,pure-0.62-2.fc21). I think the update will not be pushed to stable due to dependency errors but there is a follow-up build already in the making.
Seems to work now with llvm-3.5.0-4.fc21.x86_64 Thanks.
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