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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Null-dereference in InstCombinerImpl::foldVectorBinop call to llvm::ConstantExpr::get"
href="https://bugs.llvm.org/show_bug.cgi?id=46872">46872</a>
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<tr>
<th>Summary</th>
<td>Null-dereference in InstCombinerImpl::foldVectorBinop call to llvm::ConstantExpr::get
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>llvm-dev@redking.me.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>lebedev.ri@gmail.com, llvm-bugs@lists.llvm.org, spatel+llvm@rotateright.com
</td>
</tr></table>
<p>
<div>
<pre>Reduced from <a href="https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24434">https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24434</a>
define <4 x i32> @ossfuzz24434(<4 x i32> %a0) {
%1 = shufflevector <4 x i32> %a0, <4 x i32> undef, <4 x i32> <i32 0, i32 0,
i32 1, i32 1>
%2 = and <4 x i32> bitcast (<2 x i64> <i64 ptrtoint (<4 x i32> (<4 x i32>)*
@pr20114 to i64), i64 ptrtoint (<4 x i32> (<4 x i32>)* @pr20114 to i64)> to <4
x i32>), %1
%3 = insertelement <4 x i32> %2, i32 2147483647, i64 0
ret <4 x i32> %3
}
opt -instcombine
PLEASE submit a bug report to <a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash
backtrace.
Stack dump:
0. Program arguments: opt -instcombine fuzz24434.ll -o bar.bc
1. Running pass 'Function Pass Manager' on module 'fuzz24434.ll'.
2. Running pass 'Combine redundant instructions' on function '@pr20114'
opt(_ZN4llvm3sys15PrintStackTraceERNS_11raw_ostreamE+0x2a)[0x7ff01674e19a]
opt(_ZN4llvm3sys17RunSignalHandlersEv+0x34)[0x7ff01674bf94]
opt(+0x294c975)[0x7ff01674c975]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x12890)[0x7ff0135f2890]
opt(_ZN4llvm12ConstantExpr3getEjPNS_8ConstantES2_jPNS_4TypeE+0x2d)[0x7ff015f3ce2d]
opt(+0x24057cc)[0x7ff0162057cc]
opt(+0x2438b3a)[0x7ff016238b3a]
opt(+0x240f521)[0x7ff01620f521]
opt(+0x2411187)[0x7ff016211187]
opt(_ZN4llvm24InstructionCombiningPass13runOnFunctionERNS_8FunctionE+0x66e)[0x7ff016212dae]
opt(_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE+0x356)[0x7ff01600c6a6]
opt(_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE+0x39)[0x7ff01600d119]
opt(_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE+0x389)[0x7ff01600bfc9]</pre>
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