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