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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - "Getter" functionality (or just docs?) missing from include/llvm-c/Core.h"
href="https://bugs.llvm.org/show_bug.cgi?id=42692">42692</a>
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<th>Summary</th>
<td>"Getter" functionality (or just docs?) missing from include/llvm-c/Core.h
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</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>Core LLVM classes
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>cdisselk@cs.ucsd.edu
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>LLVM's C API appears to me to be missing getters for certain features. It's
also very possible that the functionality is there but I can't find it, in
which case I would suggest this could also be considered a documentation bug.
Specifically, getters seem to be missing for the following:
- the 'nsw' and 'nuw' flags on the 'add', 'sub', 'mul', and 'shl' instructions.
The C API has functionality to set these flags and/or create new instructions
with specific values of those flags (e.g., `LLVMBuildNSWAdd()`), but appears to
have no way to query those flags on an existing instruction.
- Likewise, the 'exact' flag on the 'udiv', 'sdiv', 'lshr', and 'ashr'
instructions.
- The various fast-math flags on floating-point operations. I don't even see
how setters are exposed for these (let alone getters), but this bug is about
getters.
- The `LLVMAtomicRMWBinOp` associated with a particular 'atomicrmw'
instruction. The BinOp can be specified when creating an 'atomicrmw'
instruction with `LLVMBuildAtomicRMW()`, but I don't see a way to determine the
BinOp of an existing 'atomicrmw' instruction.
- The contents of an inline asm string. Despite its name, `LLVMGetInlineAsm()`
appears to create inline asm values, not get information about them.
- The contents of clauses of the 'landingpad' instruction. `LLVMGetClause()`
exists, but it's unclear what functions can be called on the resulting
`LLVMValueRef`, or how to tell the `LLVMLandingPadClauseTy` of the clause.
- The operands of a 'blockaddress' constant expression. If you have a value
with `LLVMBlockAddressValueKind`, how can you determine which basic block it is
taking the address of?
- The "prefix data" associated with a function.
Again, it's very possible that getters do exist for any or all of the above,
but I would suggest that in that case, this could be considered a documentation
bug.
I can also file separate bugs for each of these issues if desired.</pre>
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