clang generates an intruction that binutils doesn't understand

Compile this function:

```c
unsigned long shr(unsigned long x)
{
return x >> 1;
}
```

with this command line: `clang-23 -m64 -O2 -mapxf -no-integrated-as -c shrq.c`

You get:

```
/tmp/shrq-9e6c3b.s: Assembler messages:
/tmp/shrq-9e6c3b.s:10: Error: operand type mismatch for `shr'
clang-23: error: assembler command failed with exit code 1 (use -v to see invocation)
```

The offending instruction is `{nf} shrq %rdi, %rax". It should be "{nf} shrq $1, %rdi, %rax`

Start by compiling the shown shrq.c function with clang-23 using the reported command line and inspect the emitted assembly, especially the offending `{nf} shrq` instruction. Done means the generated instruction uses the expected immediate operand and assembles successfully with binutils.

Written by the indexing model from the issue text.