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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW " title="NEW --- - SelectionDAG crashes on switch-case: Assertion failed: ((High - Low + 1).sle(BitWidth) && "Case range must fit in bit mask!")" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23738&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=hqJwwAuwjY_zm2qXdhOhnAjKAA2DCn3a6CCAPY8LKL0&s=H8rWQyQCSG-NEdDUdpMZODvHiVLh6i-gX0jbHqM1QXw&e=">23738</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>SelectionDAG crashes on switch-case: Assertion failed: ((High - Low + 1).sle(BitWidth) && "Case range must fit in bit mask!")
</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>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>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sanjoy@playingwithpointers.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Running llc on
declare void @g()
declare void @h()
define void @f(i4 %a) {
entry:
switch i4 %a, label %left [
i4 0, label %right
i4 1, label %right
i4 -5, label %right
]
right:
call void @g()
ret void
left:
call void @h()
ret void
}
crashes with an assertion failure.
debug+asserts-x86 $ ~/Code/llvm.git/build/release+asserts-all/bin/llc
~/tmp/reduced.ll
Assertion failed: ((High - Low + 1).sle(BitWidth) && "Case range must fit in
bit mask!"), function buildBitTests, file
../../lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp, line 7613.
0 llc 0x000000010f7d0899
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 57
1 llc 0x000000010f7d148b SignalHandler(int) + 875
2 libsystem_platform.dylib 0x00007fff8a866f1a _sigtramp + 26
3 llc 0x00000001100ed45c llvm::InlineCostAnalysis::ID +
63417
4 llc 0x000000010f7d1076 abort + 22
5 llc 0x000000010f7d1051 __assert_rtn + 81
6 llc 0x000000010f6f672e
llvm::SelectionDAGBuilder::buildBitTests(std::__1::vector<llvm::SelectionDAGBuilder::CaseCluster,
std::__1::allocator<llvm::SelectionDAGBuilder::CaseCluster> >&, unsigned int,
unsigned int, llvm::SwitchInst const*, llvm::SelectionDAGBuilder::CaseCluster&)
+ 5374
7 llc 0x000000010f6f7386
llvm::SelectionDAGBuilder::findBitTestClusters(std::__1::vector<llvm::SelectionDAGBuilder::CaseCluster,
std::__1::allocator<llvm::SelectionDAGBuilder::CaseCluster> >&,
llvm::SwitchInst const*) + 3062
8 llc 0x000000010f6c75b0
llvm::SelectionDAGBuilder::visitSwitch(llvm::SwitchInst const&) + 2560
9 llc 0x000000010f6c4689
llvm::SelectionDAGBuilder::visit(llvm::Instruction const&) + 73
10 llc 0x000000010f7106f8
llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator<llvm::Instruction
const>, llvm::ilist_iterator<llvm::Instruction const>, bool&) + 40
11 llc 0x000000010f71036e
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) + 8830
12 llc 0x000000010f70d104
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 1444
13 llc 0x000000010ede95d4 (anonymous
namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 20
14 llc 0x000000010f19929c
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 140
15 llc 0x000000010f40bf93
llvm::FPPassManager::runOnFunction(llvm::Function&) + 515
16 llc 0x000000010f40c1db
llvm::FPPassManager::runOnModule(llvm::Module&) + 43
17 llc 0x000000010f40c793
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 1123
18 llc 0x000000010e6c3c7a main + 8362
19 libdyld.dylib 0x00007fff96fa55c9 start + 1</pre>
</div>
</p>
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