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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang-cl does not support -fprofile-generate"
href="https://bugs.llvm.org/show_bug.cgi?id=41252">41252</a>
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<th>Summary</th>
<td>clang-cl does not support -fprofile-generate
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Driver
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>michaelwoerister@posteo.net
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
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<pre>`clang-cl` supports `-fprofile-instr-generate` but not `-fprofile-generate` (or
`-fcs-profile-generate`).
There is experimental support for PGO in the Rust compiler based on IR-level
instrumentation. In order to be able to use it in a mixed Rust/C codebase, C
code also has to be instrumented via the IR-level method. This works for
regular `clang` but `clang-cl` does not seem to expose this functionality.</pre>
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