[llvm-bugs] [Bug 42839] New: Compile error when input operator constraint of inline asm has "o"

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=42839

            Bug ID: 42839
           Summary: Compile error when input operator constraint of inline
                    asm has "o"
           Product: new-bugs
           Version: unspecified
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: ueno.masakazu at jp.fujitsu.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

Created attachment 22321
  --> https://bugs.llvm.org/attachment.cgi?id=22321&action=edit
Error log when compiling ruby

When compiling ruby-2.5.5 on aarch64/thunderX2t99, the compilation process is
aborted.
The problem seems to be due to the input operator constraint of inline asm
having "o".

Here's a short example.
-------------------
//This program aborts because "o" is included in "nor".

void hoge(void)
{
    static const char *str = "HOGE";
    __asm__ __volatile__(".asciz \"%[_SDT_A2]\"" : : [_SDT_A2] "nor" ((str)));
}

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

There is no description of the "o" in the AArch64 section of the following URL,
but how should it be done?
 > https://llvm.org/docs/LangRef.html#supported-constraint-code-list
If "o" is included, is it correct to ignore it?


The environment used for confirmation is as follows.
$ clang --version
clang version 7.0.1 (tags/RELEASE_701/final)
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /oss/LLVM/llvm-7.0.1/install/bin

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20190731/97a325fc/attachment.html>