[llvm-bugs] [Bug 50746] New: clang crashes on riscv64

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=50746

            Bug ID: 50746
           Summary: clang crashes on riscv64
           Product: clang
           Version: 11.0
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Driver
          Assignee: unassignedclangbugs at nondot.org
          Reporter: serge.vakulenko at gmail.com
                CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk

I use Debian 11 installed on RISC-V platform: Nezha board with Allwinner D1
processor.

I installed clang as usual: "sudo apt install clang". The version is
1:11.0-51+nmu5. The source of the packages is
http://ftp.ports.debian.org/debian-ports/.

When I run clang from command line without parameters, it crashes with message:

$ clang
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash
backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: clang 
1.      Compilation construction
/usr/lib/riscv64-linux-gnu/libLLVM-11.so.1(_ZN4llvm3sys15PrintStackTraceERNS_11raw_ostreamE+0x28)[0x3fec874c08]
Illegal instruction

Other compilers seem to work fine. I checked gcc, rustc, go.

Information about the system:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 11 (bullseye)
Release:        11
Codename:       bullseye

$ uname -a
Linux nezha 5.4.61 #68 PREEMPT Tue Jun 1 04:18:22 UTC 2021 riscv64 GNU/Linux

$ /usr/sbin/hwinfo --short
cpu:                                                            
                       rv64imafdcvu
keyboard:
  /dev/ttyS0           serial console
network:
  eth0                 ARM Ethernet controller
  wlan0                ARM Ethernet controller
                       Network controller
network interface:
  eth0                 Ethernet network interface
  lo                   Loopback network interface
  sit0                 Network Interface
  wlan0                WLAN network interface
disk:
  /dev/mmcblk0         Disk
partition:
  /dev/mmcblk0p1       Partition
  /dev/mmcblk0p2       Partition
  /dev/mmcblk0p3       Partition
  /dev/mmcblk0p4       Partition
  /dev/mmcblk0p5       Partition
  /dev/mmcblk0p6       Partition
  /dev/mmcblk0p7       Partition
  /dev/mmcblk0p8       Partition
hub:
                       Linux Foundation 2.0 root hub
                       Linux Foundation 1.1 root hub
memory:
                       Main Memory

Thanks,
--Serge

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