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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - invalid instruction when using ldrht/ldrsht/ldrsbt without immediate offset"
href="https://bugs.llvm.org/show_bug.cgi?id=45070">45070</a>
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<th>Summary</th>
<td>invalid instruction when using ldrht/ldrsht/ldrsbt without immediate offset
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: ARM
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>stefan@agner.ch
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, smithp352@googlemail.com, Ties.Stuij@arm.com
</td>
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<p>
<div>
<pre>Trying to assemble these instructions without offset (which is optional
according to the ARM ARM) leads to invalid instruction:
.syntax unified
.text
.arch armv6t2
.arm
ldrht r5, [r4]
Building with:
$ llvm-mc --triple=armv6t2-linux-gnueabihf repr-armv6t2.S
.text
.arch armv6t2
.code 32
repr-armv6t2.S:5:2: error: invalid instruction, any one of the following would
fix this:
ldrht r5, [r4]
^
repr-armv6t2.S:5:16: note: too few operands for instruction
ldrht r5, [r4]
^
repr-armv6t2.S:5:2: note: instruction requires: thumb2
ldrht r5, [r4]
^
This appeared when trying to build Linux with Clang's integrated assembler:
<a href="https://github.com/ClangBuiltLinux/linux/issues/909">https://github.com/ClangBuiltLinux/linux/issues/909</a></pre>
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