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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Parser::ParseCastExpression - dodgy unused write"
href="https://bugs.llvm.org/show_bug.cgi?id=50122">50122</a>
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<th>Summary</th>
<td>Parser::ParseCastExpression - dodgy unused write
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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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>Frontend
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>llvm-dev@redking.me.uk
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</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, martongabesz@gmail.com, neeilans@live.com, richard-llvm@metafoo.co.uk, saar@raz.email
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<p>
<div>
<pre>The static analyzer is warning about an unread variable write in
Parser::ParseCastExpression:
switch (SavedKind) {
case tok::l_paren: {
// If this expression is limited to being a unary-expression, the paren can
// not start a cast expression.
ParenParseOption ParenExprType;
switch (ParseKind) {
case CastParseKind::UnaryExprOnly:
if (!getLangOpts().CPlusPlus)
ParenExprType = CompoundLiteral; // <<<< UNUSED WRITE WARNING
LLVM_FALLTHROUGH;
case CastParseKind::AnyCastExpr:
ParenExprType = ParenParseOption::CastExpr;
break;
case CastParseKind::PrimaryExprOnly:
ParenExprType = FoldExpr;
break;
}
This looks like it was introduced in <a href="https://reviews.llvm.org/D43357">https://reviews.llvm.org/D43357</a>
Before that the code looked like:
ParenParseOption ParenExprType =
(isUnaryExpression && !getLangOpts().CPlusPlus) ? CompoundLiteral
: CastExpr;
So maybe we're missing a break ?</pre>
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