[Bug 106584] segfault in r600_sb::alu_group_tracker::alu_group_tracker with gcc 8.1 LTO

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=106584

            Bug ID: 106584
           Summary: segfault in
                    r600_sb::alu_group_tracker::alu_group_tracker with gcc
                    8.1 LTO
           Product: Mesa
           Version: 18.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: alex_y_xu@yahoo.ca
        QA Contact: dri-devel@lists.freedesktop.org

looks like there is an unaligned XMM store:

(gdb) info reg
rax            0x0      0
rbx            0x0      0
rcx            0x7fffffffc660   140737488340576
rdx            0x55555574eff0   93824994308080
rsi            0x555555748d90   93824994282896
rdi            0x7fffffffc810   140737488341008
rbp            0x7fffffffc080   0x7fffffffc080
rsp            0x7fffffffc008   0x7fffffffc008
r8             0x55555574fad0   93824994310864
r9             0x7fffffffbdcc   140737488338380
r10            0x1      1
r11            0x2      2
r12            0x7ffff45637b8   140737292679096
r13            0x555555752580   93824994321792
r14            0x7fffffffc320   140737488339744
r15            0x555555748d90   93824994282896
rip            0x7ffff4371e06   0x7ffff4371e06
<r600_sb::alu_group_tracker::alu_group_tracker(r600_sb::shader&)+38>
eflags         0x10246  [ PF ZF IF RF ]
cs             0x33     51
ss             0x2b     43
ds             0x0      0
es             0x0      0
fs             0x0      0
gs             0x0      0
(gdb) disas
Dump of assembler code for function
r600_sb::alu_group_tracker::alu_group_tracker(r600_sb::shader&):
   0x00007ffff4371de0 <+0>:     pxor   %xmm1,%xmm1
   0x00007ffff4371de4 <+4>:     pxor   %xmm0,%xmm0
   0x00007ffff4371de8 <+8>:     xor    %eax,%eax
   0x00007ffff4371dea <+10>:    movups %xmm1,0xb0(%rdi)
   0x00007ffff4371df1 <+17>:    movups %xmm1,0xc0(%rdi)
   0x00007ffff4371df8 <+24>:    movq   $0x0,0xd0(%rdi)
   0x00007ffff4371e03 <+35>:    mov    (%rsi),%rdx
=> 0x00007ffff4371e06 <+38>:    movaps %xmm0,0x8(%rdi)
   0x00007ffff4371e0a <+42>:    movaps %xmm0,0x18(%rdi)
   0x00007ffff4371e0e <+46>:    movups %xmm0,0x2c(%rdi)
   0x00007ffff4371e12 <+50>:    movups %xmm0,0x3c(%rdi)
   0x00007ffff4371e16 <+54>:    movups %xmm0,0x4c(%rdi)
   0x00007ffff4371e1a <+58>:    movups %xmm0,0x5c(%rdi)
   0x00007ffff4371e1e <+62>:    movups %xmm0,0x6c(%rdi)
   0x00007ffff4371e22 <+66>:    movups %xmm0,0x7c(%rdi)
   0x00007ffff4371e26 <+70>:    movups %xmm0,0x9c(%rdi)
   0x00007ffff4371e2d <+77>:    movl   $0x2,0x28(%rdi)
   0x00007ffff4371e34 <+84>:    movl   $0x0,0x8c(%rdi)
   0x00007ffff4371e3e <+94>:    movl   $0x0,0x90(%rdi)
   0x00007ffff4371e48 <+104>:   movl   $0x0,0x94(%rdi)
   0x00007ffff4371e52 <+114>:   movl   $0x0,0x98(%rdi)
   0x00007ffff4371e5c <+124>:   cmpl   $0x4,0x5c(%rdx)
   0x00007ffff4371e60 <+128>:   mov    %rsi,(%rdi)
   0x00007ffff4371e63 <+131>:   movups %xmm0,0x118(%rdi)
   0x00007ffff4371e6a <+138>:   pxor   %xmm0,%xmm0
   0x00007ffff4371e6e <+142>:   movl   $0x0,0xe8(%rdi)
   0x00007ffff4371e78 <+152>:   setne  %al
   0x00007ffff4371e7b <+155>:   movq   $0x0,0xf0(%rdi)
   0x00007ffff4371e86 <+166>:   add    $0x4,%eax
   0x00007ffff4371e89 <+169>:   movb   $0x0,0x116(%rdi)
   0x00007ffff4371e90 <+176>:   mov    %eax,0xdc(%rdi)
   0x00007ffff4371e96 <+182>:   lea    0xe8(%rdi),%rax
   0x00007ffff4371e9d <+189>:   mov    %rax,0xf8(%rdi)
   0x00007ffff4371ea4 <+196>:   mov    %rax,0x100(%rdi)
   0x00007ffff4371eab <+203>:   xor    %eax,%eax
   0x00007ffff4371ead <+205>:   mov    %ax,0x114(%rdi)
   0x00007ffff4371eb4 <+212>:   movq   $0x0,0x108(%rdi)
   0x00007ffff4371ebf <+223>:   movl   $0x0,0x110(%rdi)
   0x00007ffff4371ec9 <+233>:   movq   $0x0,0x128(%rdi)
   0x00007ffff4371ed4 <+244>:   movups %xmm0,0x130(%rdi)
   0x00007ffff4371edb <+251>:   movq   $0x0,0x140(%rdi)
   0x00007ffff4371ee6 <+262>:   cmpb   $0x1,0x68(%rdx)
   0x00007ffff4371eea <+266>:   sbb    %eax,%eax
   0x00007ffff4371eec <+268>:   and    $0xfffffff0,%eax
   0x00007ffff4371eef <+271>:   add    $0x1f,%eax
   0x00007ffff4371ef2 <+274>:   mov    %eax,0xd8(%rdi)
   0x00007ffff4371ef8 <+280>:   retq

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