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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - ObjectSizeOffsetVisitor::visitArgument failes to return vaild result"
href="http://llvm.org/bugs/show_bug.cgi?id=17054">17054</a>
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<th>Summary</th>
<td>ObjectSizeOffsetVisitor::visitArgument failes to return vaild result
</td>
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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>PC
</td>
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Global Analyses
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>manjian2006@gmail.com
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>When I used latest chunk to compile chromium project,it generated a deadLoop
when compiling file_util::ReadFromFD.I tried to debug,and find this bug was
caused by ObjectSizeOffsetVisitor::visitArgument.It originally looked like
SizeOffsetType ObjectSizeOffsetVisitor::visitArgument(Argument &A) {
// no interprocedural analysis is done at the moment
if (!A.hasByValAttr()) {
++ObjectVisitorArgument;
return unknown();
}
PointerType *PT = cast<PointerType>(A.getType());
APInt Size(IntTyBits, TD->getTypeAllocSize(PT->getElementType()));
return std::make_pair(align(Size, A.getParamAlignment()), Zero);
}
And I commented out
// if (!A.hasByValAttr()) {
// ++ObjectVisitorArgument;
// return unknown();
// }
Then the code was generated correctly.
The attachment is the code that causes trouble.</pre>
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