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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Tablegen does not generate the correct operand types for the MCInstrDesc:s"
href="https://bugs.llvm.org/show_bug.cgi?id=33545">33545</a>
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<th>Summary</th>
<td>Tablegen does not generate the correct operand types for the MCInstrDesc:s
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Target Description Classes
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>paulsson@linux.vnet.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>I noticed that it seems that all the addressing operands of the SystemZ backend
instructions seem to all have the UNKNOWN type, which is a bit odd. I was
expecting to see either REGISTER or IMMEDIATE.
For example:
lib/Target/SystemZ/SystemZGenInstrInfo.inc:
{ 1142, 4, 1, 6, 41,
0|(1ULL<<MCID::FoldableAsLoad)|(1ULL<<MCID::MayLoad), 0x10dULL, nullptr,
nullptr, OperandInfo30, -1 ,nullptr }, // Inst #1142 = LG (Load 64 bits from
memory)
static const MCOperandInfo OperandInfo30[] = { { SystemZ::GR64BitRegClassID, 0,
MCOI::OPERAND_REGISTER, 0 }, { SystemZ::ADDR64BitRegClassID, 0,
MCOI::OPERAND_UNKNOWN, 0 }, { -1, 0, MCOI::OPERAND_UNKNOWN, 0 }, {
SystemZ::ADDR64BitRegClassID, 0, MCOI::OPERAND_UNKNOWN, 0 }, };
It seems for all AddressingMode operands, these are all UNKNOWN instead of
OPERAND_REGISTER / OPERAND_IMMEDIATE...
Is this a bug in tablegen, or is it possible to fix it in the SystemZ
implementation?</pre>
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