<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - SROA assertion: creating bitcast between ptr types with different addr spaces"
href="https://llvm.org/bugs/show_bug.cgi?id=27557">27557</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>SROA assertion: creating bitcast between ptr types with different addr spaces
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jack.liu@intel.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>In SROA.cpp's canConvertValue() function, it will return "true" if both NewTy
and OldTy are ptr type. Probably we need to check whether those two pointers
are pointing to the same addr space; otherwise this will trigger an assertion
later when SROA tries to create a bitcast between pointers with different addr
spaces.
A proposed fix:
--- a/lib/Transforms/Scalar/SROA.cpp
+++ b/lib/Transforms/Scalar/SROA.cpp
@@ -1636,7 +1636,7 @@ static bool canConvertValue(const DataLayout &DL, Type
*OldTy, Type *NewTy) {
NewTy = NewTy->getScalarType();
if (NewTy->isPointerTy() || OldTy->isPointerTy()) {
if (NewTy->isPointerTy() && OldTy->isPointerTy())
- return true;
+ return cast<PointerType>(NewTy)->getPointerAddressSpace() ==
cast<PointerType>(OldTy)->getPointerAddressSpace();
if (NewTy->isIntegerTy() || OldTy->isIntegerTy())
return true;</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>