<html>
<head>
<base href="http://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 --- - X86 DAG->DAG Instruction Selection: Assertion `NumBits >= MIN_INT_BITS && "bitwidth too small"' failed."
href="http://llvm.org/bugs/show_bug.cgi?id=16083">16083</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>X86 DAG->DAG Instruction Selection: Assertion `NumBits >= MIN_INT_BITS && "bitwidth too small"' failed.
</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>Linux
</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>kcc@google.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>LLVM r182352.
This is a very recent regression.
long long a;
int b;
int fn1 () {
return b || 0 & a;
}
% clang -cc1 -triple i386-unknown-linux-gnu -emit-obj -x c bit.c
clang: llvm/lib/IR/Type.cpp:306: static llvm::IntegerType
*llvm::IntegerType::get(llvm::LLVMContext &, unsigned int): Assertion `NumBits
<span class="quote">>= MIN_INT_BITS && "bitwidth too small"' failed.</span >
0 clang 0x00000000011fce25 llvm::sys::PrintStackTrace(_IO_FILE*) +
37
1 clang 0x00000000011fd313
2 libpthread.so.0 0x00007f2c9ae23cb0
3 libc.so.6 0x00007f2c9a062425 gsignal + 53
4 libc.so.6 0x00007f2c9a065b8b abort + 379
5 libc.so.6 0x00007f2c9a05b0ee
6 libc.so.6 0x00007f2c9a05b192
7 clang 0x0000000001149b2c
llvm::IntegerType::get(llvm::LLVMContext&, unsigned int) + 444
8 clang 0x0000000001153566
llvm::EVT::getExtendedIntegerVT(llvm::LLVMContext&, unsigned int) + 6
9 clang 0x0000000000badecb
llvm::TargetLowering::SimplifySetCC(llvm::EVT, llvm::SDValue, llvm::SDValue,
llvm::ISD::CondCode, bool, llvm::TargetLowering::DAGCombinerInfo&,
llvm::DebugLoc) const + 2475
10 clang 0x0000000000b14917
11 clang 0x0000000000aed701
12 clang 0x0000000000ad9afc
13 clang 0x0000000000ad94ed
llvm::SelectionDAG::Combine(llvm::CombineLevel, llvm::AliasAnalysis&,
llvm::CodeGenOpt::Level) + 733
14 clang 0x0000000000b91557
llvm::SelectionDAGISel::CodeGenAndEmitDAG() + 871
15 clang 0x0000000000b90989
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) + 6265
16 clang 0x0000000000b8e456
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 1302
17 clang 0x0000000000cd0e1d
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 125
18 clang 0x000000000113f78c
llvm::FPPassManager::runOnFunction(llvm::Function&) + 364
19 clang 0x000000000113f9fb
llvm::FPPassManager::runOnModule(llvm::Module&) + 43
20 clang 0x000000000113fd4e
llvm::MPPassManager::runOnModule(llvm::Module&) + 430
21 clang 0x00000000011403eb llvm::PassManagerImpl::run(llvm::Module&)
+ 539
22 clang 0x000000000114055a llvm::PassManager::run(llvm::Module&) +
10
23 clang 0x000000000121a647
clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::CodeGenOptions
const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::Module*,
clang::BackendAction, llvm::raw_ostream*) + 5943
24 clang 0x0000000001217cbb
25 clang 0x00000000014ad433 clang::ParseAST(clang::Sema&, bool, bool)
+ 515
26 clang 0x0000000001216fd2 clang::CodeGenAction::ExecuteAction() +
194
27 clang 0x00000000013fc621 clang::FrontendAction::Execute() + 113
28 clang 0x00000000013dc94d
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 909
29 clang 0x00000000011ffc84
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 3028
30 clang 0x0000000000631c44 cc1_main(char const**, char const**, char
const*, void*) + 708
31 clang 0x000000000062f5fb main + 7083
32 libc.so.6 0x00007f2c9a04d76d __libc_start_main + 237
33 clang 0x000000000062d919
Stack dump:
0. Program arguments: clang -cc1 -triple i386-unknown-linux-gnu -emit-obj -x
c bit.c
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'bit.c'.
4. Running pass 'X86 DAG->DAG Instruction Selection' on function '@fn1'
Aborted (core dumped)</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>