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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Incomplete support for `--target`in the code-gen layer"
href="https://bugs.llvm.org/show_bug.cgi?id=52418">52418</a>
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<th>Summary</th>
<td>Incomplete support for `--target`in the code-gen layer
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<th>Product</th>
<td>flang
</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
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Driver
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>andrzej.warzynski@gmail.com
</td>
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<th>CC</th>
<td>David.Truby@arm.com, jperier@nvidia.com, kirankumartp@gmail.com, llvm-bugs@lists.llvm.org, sscalpone@nvidia.com
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<pre>This came up during a discussion on <a href="https://reviews.llvm.org/D112961">https://reviews.llvm.org/D112961</a>.
As per the comment at the top of
"flang/lib/Optimizer/CodeGen/DescriptorModel.h", various assumptions about the
target machine are made in the code-gen layer. This is likely to cause
`--target` (or e.g. `-m64` and `-m32`) to malfunction when using Flang's
interoperability with C (see how various CFI structures are lowered).
Note that `--target` is not available in the driver yet. Also, it is possible
that the assumptions made when lowering the CFI structures will affect other
parts of the code-gen too. However, I suspect that most things will work
correctly when generating code for the host/native target.
I'm creating this issue as a placeholder and as a note for our future selves.
This is currently _not_ being investigated or worked on.
-Andrzej
[1] <a href="https://github.com/flang-compiler/f18-llvm-project">https://github.com/flang-compiler/f18-llvm-project</a>
[2] <a href="https://github.com/llvm/llvm-project">https://github.com/llvm/llvm-project</a></pre>
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