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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [RISCV] Handle long conditional branch"
href="https://bugs.llvm.org/show_bug.cgi?id=47910">47910</a>
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<th>Summary</th>
<td>[RISCV] Handle long conditional branch
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<th>Product</th>
<td>new-bugs
</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
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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>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>Hsiangkai@gmail.com
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<pre>Created <span class=""><a href="attachment.cgi?id=24079" name="attach_24079" title="Test file for long conditional branch.">attachment 24079</a> <a href="attachment.cgi?id=24079&action=edit" title="Test file for long conditional branch.">[details]</a></span>
Test file for long conditional branch.
For RISC-V conditional branch, the branch targets should be within +-4K off pc.
If the branch target is out of range, one possible solution is to relax it
using other instructions. In current RISC-V implementation, we only issue error
messages for users. It looks like
$ llvm-mc -arch=riscv64 -filetype=obj test.s
test-2.s:4:9: error: fixup value out of range
bne a0, a1, .L1
^
test-2.s:10:9: error: fixup value out of range
beqz a0, .L2
^
We should help users to relax conditional branches if possible.</pre>
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