<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/86450>86450</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [AMDGPU] Do not emit -fcf-protection=full on GPU architectures
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

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

<pre>
    In Gentoo 23.0 (upcoming) and hardened profile `-fcf-protection=full` is added automatically via `/etc/clang/x86_64-pc-linux-gnu-clang++.cfg` (as well as [other flags](https://wiki.gentoo.org/wiki/Hardened/Toolchain#Changes)). However this flag does not work well with heterogeneous hip code:

```
cd /tmp && wget https://raw.githubusercontent.com/ROCm-Developer-Tools/HIP-CPU/master/examples/vadd_hip/vadd_hip.cpp

# -fcf-protection=full is added manually for demonstration
/usr/lib/llvm/18/bin/clang++ --offload-arch=native -x hip vadd_hip.cpp -o vadd_hip -fno-stack-protector --hip-link -fcf-protection=full -nogpulib

error: option 'cf-protection=return' cannot be specified on this target
```

Although it is possible to use `-fcf-protection=full -Xarch_device -fcf-protection=none`,  to override this, but it is very irritating and it can not be added to all files, as it produces `warning: argument unused during compilation: '-Xarch_device -fcf-protection=none'` for non-hip files.

In https://github.com/llvm/llvm-project/pull/70799 you added code to "not emit the stack protector metadata on unsupported architectures". Can you do the same for `-fcf-protection=...`, to apply CET only for host code? Thanks!
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJyUVdtu2zgTfhr6ZiBBHvl44Qsn_tUW-BcbLFpg7wqaHEncUByBBzt--wVltU2KdLELBIolUcPvMN9QhmA6R3QQ6wexPi1kij37w9F1_vZ_fjaLM-vb4ZODD-QiM2BdViBwl0bFg3GdwD1Ip6GXXpMjDaPn1lgCsamKVrXF6DmSioadqE9tslZsKjABpNakQabIg4xGSWtvcDEyfyewoagENsrKvEPzstt83ayKURXWuPRSdC4V87sHgQ-lartcVeBOBriStSADiPUDx548tFZ2QaxPAnd9jGMQ9VFgI7C5mmdTdhOvkn03PxHYfJzJCGw-M1vVS-ME1o-9dB0FgXuB-xI-8pUu5CH2JkybgGYK4DjClf3zHcjVxB56iuS5I0ecAvRmBMWaMo7qJKpv1001_023SoPAJg4jCNwI3MC1owhvCXh5LTsT-3ROgbxiF8nFUvEgsPnj98ehONGFLI_ki8wjZGqfnorHpy8Cm0GGSD5r_SKH0WZezUVq_bU346ufpRrHNzCxhveN_eHqIF2aDG3Zg6aBXYheTkvnGk0KeWtrzvlqLxnxciewOWelm1fmQlFw21qWupBe9aI-ORnNhaB4mZR8jRMK_n4PReu4CFGq529Q2UNR9GbMXfT8KxKF425MGdgr0uQ9e1Efgce8FgRuf_7YU0zeCdyCki73wJkgjKRMa0gDu3ubROk7iu8afr8ebew5dT2YmPUcOQRztgSRIYV_SBUUf2Z5vmq6GEXvkHPsaMrWI-RifCHvjaYJVn54TnHe80L-BsZ7E2U0rpvibWKmBTOvu8uRQVoLOe1TBRnystGzTopChnqV3uUZUR9B-i4N5CIklwJp0Mnn2oqH0dh7a9THrOu_4oHbnPfcXY5dtvSOonyt5Cf3U1ruSZnjMfdc_pfr_0UqCmzGPJ-w2Vbb_R5unGamOa2ZrkDMCtBgIsSeYOou-NFdA0WpZZTZ7uRCGkf2MU85r3qT1ySfpcISHqWb6mu-F5IDTXTe9bcsy9m5LPk42hs8_u8zsJsT1nOI80Rp4HMv3XMQuFzoQ6339V4u6LDcLpf1strtcdEfaLXbrdtttd8o1erVdr9t9WaJq_Ver3GL54U5YIWrqsYVVtVuiSW2O0K5wS3uV3UtlVhVNEhjyyxfHp0LE0Kiw26zWlcLK89kw3SgIDq6wvRSIObzxR8myc-pC2JVWRNi-FElmmink-j42-nD0xexPsGJ4bvkv-h8dvDh6ctbkRfJ28N_tn8CmufgROTvAAAA__8IFFav">