[Bug 198883] amdgpu: carrizo: Screen stalls after starting X

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=198883

--- Comment #42 from Ricardo Ribalda (ricardo.ribalda at gmail.com) ---
With current LLVM7 master X does not start at all. I get the following output:

root at qt5122:~# X

X.Org X Server 1.19.3
Release Date: 2017-03-15
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.14.0-3-amd64 x86_64 
Current Operating System: Linux qt5122 4.16.0-rc4-qtec-standard #1 SMP Fri Mar
9 15:13:05 CET 2018 x86_64
Kernel command line: BOOT_IMAGE=/boot/bzImage rw root=PARTUUID=c839955a-02
rootwait qtec_mem.size=64 quiet
Build Date: 09 March 2018  02:29:53PM

Current version of pixman: 0.34.0
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Fri Mar  9 15:47:03 2018
(==) Using config file: "/etc/X11/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(II) [KMS] Kernel modesetting enabled.
LLVM ERROR: Cannot select: 0x7f74b40a59e0: v4i32,ch =
load<LD16[%22(addrspace=2)](dereferenceable)(invariant)> 0x7f74b40251c8,
0x7f74b40a5978, undef:i32
  0x7f74b40a5978: i32 = add 0x7f74b409f378, Constant:i32<16>
    0x7f74b409f378: i32,ch = CopyFromReg 0x7f74b40251c8, Register:i32 %4
      0x7f74b409f310: i32 = Register %4
    0x7f74b40a5910: i32 = Constant<16>
  0x7f74b409fc68: i32 = undef
In function: main
LLVM ERROR: Cannot select: 0x7f74a00b0570: v4i32,ch =
load<LD16[%22(addrspace=2)](dereferenceable)(invariant)> 0x7f74a002eab8,
0x7f74a00b0508, undef:i32
  0x7f74a00b0508: i32 = add 0x7f74a00a9f08, Constant:i32<16>
    0x7f74a00a9f08: i32,ch = CopyFromReg 0x7f74a002eab8, Register:i32 %4
      0x7f74a00a9ea0: i32 = Register %4
    0x7f74a00b04a0: i32 = Constant<16>
  0x7f74a00aa7f8: i32 = undef
In function: main
root at qt5122:~#

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