[llvm-bugs] [Bug 47195] New: [10/11] fatal error: error in backend: Cannot emit physreg copy instruction

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47195

            Bug ID: 47195
           Summary: [10/11] fatal error: error in backend: Cannot emit
                    physreg copy instruction
           Product: new-bugs
           Version: 11.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: anbu1024.me at gmail.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

$ cat test.c 

void foo ( int arg ) { 
    register int x asm ( "20" ) = arg ; 
    asm ( "#before" : : "r" ( x ) ) ; 
}

-------------------------------------------------------------------------------

$ clang --version
clang version 10.0.1 
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/tom/Documents/llvm/10.0.1/install/bin

-------------------------------------------------------------------------------

$ clang test.c 
fatal error: error in backend: Cannot emit physreg copy instruction
clang-10: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
clang version 10.0.1 
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/tom/Documents/llvm/10.0.1/install/bin
clang-10: note: diagnostic msg: PLEASE submit a bug report to
https://bugs.llvm.org/ and include the crash backtrace, preprocessed source,
and associated run script.
clang-10: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-10: note: diagnostic msg: /tmp/test-f29b44.c
clang-10: note: diagnostic msg: /tmp/test-f29b44.sh
clang-10: note: diagnostic msg: 

********************

-------------------------------------------------------------------------------

$ clang-11 --version
clang version 11.0.0
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir:
/home/tom/Documents/llvm/clang+llvm-11.0.0-rc1-x86_64-linux-gnu-ubuntu-16.04/bin

-------------------------------------------------------------------------------

$ clang-11 test.c 
fatal error: error in backend: Cannot emit physreg copy instruction
clang-11: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
clang version 11.0.0
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir:
/home/tom/Documents/llvm/clang+llvm-11.0.0-rc1-x86_64-linux-gnu-ubuntu-16.04/bin
clang-11: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-11: note: diagnostic msg: /tmp/test-e87a8e.c
clang-11: note: diagnostic msg: /tmp/test-e87a8e.sh
clang-11: note: diagnostic msg: 

********************

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