[Bug c/116540] New: sh ignores asm operand modifier %c

[vegard.nossum at oracle dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116540

            Bug ID: 116540
           Summary: sh ignores asm operand modifier %c
           Product: gcc
           Version: 14.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vegard.nossum at oracle dot com
  Target Milestone: ---

According to https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html, %c is a
generic (architecture-independent) operand modifier that is supposed to "print
the constant expression with no punctuation". However, on the sh architecture
the number is still prefixed by "#". Input:

void foo() {
    asm volatile (".ascii \"%c0\"" :: "i" (123));
}

Result:

        .ascii "#123"

See also: https://godbolt.org/z/8ePq1T4rY

This works correctly on other architectures like x86 and aarch64.