[AArch64] Error when assembling call to function named `ror`

[zyedidia]

The following AArch64 assembly file fails to compile with Clang even though it is valid:

ror:
    ret

foo:
    bl ror

$ clang -c test.s
test.s:5:11: error: expected #imm after shift specifier
    bl ror
          ^
$ gcc -c test.s
$ # no error

ror or any other aarch64 shift operation should be a valid function/label name. Tested with the latest version of LLVM.

[pinskia]

You can also reproduce it with a C testcase with just -c -save-temps too:

int ror(void);
int f()
{
        return ror();
}

[llvmbot]

@llvm/issue-subscribers-backend-aarch64

Author: Zachary Yedidia (zyedidia)

The following AArch64 assembly file fails to compile with Clang even though it is valid:

ror:
    ret

foo:
    bl ror

$ clang -c test.s
test.s:5:11: error: expected #imm after shift specifier
    bl ror
          ^
$ gcc -c test.s
$ # no error

ror or any other aarch64 shift operation should be a valid function/label name. Tested with the latest version of LLVM.