Created attachment 123038 [details]
Steam Log X rebirth

hi guys, since GL4.2 update(not sure if mesa or llvm are to blame) several
steam games got broken on Tahiti (R9-280)

X Rebirth, Left 4 Dead 2, so far

LLVM triggered Diagnostic Handler: Illegal instruction detected: Operand has
incorrect register class.
LLVM failed to compile shader

attached full steam log

Ty very much for your hard work

Hardware/Software details

Arquitectura:          x86_64
modo(s) de operaci�n de las CPUs:32-bit, 64-bit
Orden de los bytes:    Little Endian
CPU(s):                8
Lista de la(s) CPU(s) en l�nea:0-7
Hilo(s) de procesamiento por n�cleo:2
N�cleo(s) por �socket�:4
�Socket(s)�          1
Modo(s) NUMA:          1
ID de fabricante:      GenuineIntel
Familia de CPU:        6
Modelo:                60
Nombre del modelo:     Intel(R) Xeon(R) CPU E3-1231 v3 @ 3.40GHz
Revisi�n:             3
CPU MHz:               3352.718
CPU MHz m�x.:         3800,0000
CPU MHz m�n.:         800,0000
BogoMIPS:              6786.56
Virtualizaci�n:       VT-x
Cach� L1d:            32K
Cach� L1i:            32K
Cach� L2:             256K
Cach� L3:             8192K
CPU(s) del nodo NUMA 0:0-7
Indicadores:           fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx
pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology
nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est
tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt
tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm tpr_shadow vnmi
flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid
rtm xsaveopt dtherm ida arat pln pts

OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD TAHITI (DRM 2.43.0, LLVM 3.9.0)
OpenGL core profile version string: 4.2 (Core Profile) Mesa 11.3.0-devel
(git-3a26ef2)
OpenGL core profile shading language version string: 4.20
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile

llvm-config --version
3.9.0svn

Exports:
R600_DEBUG=sisched
STEAM_RUNTIME=0