<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/90470>90470</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            clang riscv64 target accepts rv32 -march option (and vice versa)
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang,
            backend:RISC-V
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          DavidSpickett
      </td>
    </tr>
</table>

<pre>
    The following does not error or warn:
```
$ ./bin/clang /tmp/test.c -target riscv64 -march=rv32i -o - -S
```
And it produces code according to the value of `-march`:
```
        .text
        .attribute      4, 16
        .attribute      5, "rv32i2p1"
```
The opposite also works:
```
$ ./bin/clang /tmp/test.c -target riscv32 -march=rv64i -o - -S
```
I assume I have to pick one of `-target riscv32` and `-target riscv64` because if I use `-target riscv` I get:
```
$ ./bin/clang /tmp/test.c -target riscv -march=rv64i -o - -S
clang: error: unsupported option '-march=' for target 'riscv'
```
Which itself is a bit unclear because I'm not sure `riscv` is even a valid target to begin with, but this is not RISC-V specific:
```
$ ./bin/clang /tmp/test.c -target aardvark -march=rv64i -o - -S
clang: error: unsupported option '-march=' for target 'aardvark'
```
</pre>
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