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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - MSVC: Instruction does not dominate all uses"
href="https://llvm.org/bugs/show_bug.cgi?id=25698">25698</a>
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<th>Summary</th>
<td>MSVC: Instruction does not dominate all uses
</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>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>alex@crichton.co
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>When compiling this IR via `llc -filetype=obj`
target triple = "i686-pc-windows-msvc"
declare i32 @_except_handler3(...)
declare void @bar1(i32*)
declare void @bar2()
define void @foo(i32**) personality i32 (...)* @_except_handler3 {
entry-block:
invoke void @bar2()
to label %done unwind label %cleanup1
done:
ret void
cleanup1:
%pad2 = cleanuppad []
invoke void @bar2()
to label %cleanupdone unwind label %cleanup2
cleanupdone:
cleanupret %pad2 unwind label %cleanup2
cleanup2:
%pad3 = cleanuppad []
%t6 = load i32*, i32** %0
br label %loop
loop:
invoke void @bar2()
to label %loop unwind label %cleanup3
cleanup3:
%pad4 = cleanuppad []
call void @bar1(i32* %t6)
unreachable
}
it prints out:
Instruction does not dominate all uses!
%t6 = load i32*, i32** %0
call void @bar1(i32* %t6)
LLVM ERROR: Broken function found, compilation aborted!
This is currently a reduce case from a much larger project, so the IR may look
a little odd, but I can also work on providing an IR sample a little closer to
the original project if that helps!</pre>
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