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<base href="http://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 --- - Compiler crash with pragma clang optimize off"
href="http://llvm.org/bugs/show_bug.cgi?id=22664">22664</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Compiler crash with pragma clang optimize off
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.6
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</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>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>michael.schlottke@sloede.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>Created <span class=""><a href="attachment.cgi?id=13927" name="attach_13927" title="error message + stacktrace">attachment 13927</a> <a href="attachment.cgi?id=13927&action=edit" title="error message + stacktrace">[details]</a></span>
error message + stacktrace
When I add
#pragma clang optimize off
to the top of a file, Clang crashes on Bluegene/Q frontends (IBM Power 740)
with the following error (see full stack trace attached):
Impossible reg-to-reg copy
UNREACHABLE executed at
/gpfs/vesta-home/hfinkel/rpmbuild/BUILD/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp:777!
0 libLLVM-3.6svn.so 0x00000fff944ab34c llvm::sys::PrintStackTrace(_IO_FILE*) +
4280084604
1 libLLVM-3.6svn.so 0x00000fff944ac3e8
2 libLLVM-3.6svn.so 0x00000fff944acb74
3 0x00000fff95340448 __kernel_sigtramp_rt64 + 0
4 libc.so.6 0x00000080a18d6e08 abort + 4293479616
5 libLLVM-3.6svn.so 0x00000fff9448a47c llvm::llvm_unreachable_internal(char
const*, char const*, unsigned int) + 4279958452
6 libLLVM-3.6svn.so 0x00000fff93f9fc28
llvm::PPCInstrInfo::copyPhysReg(llvm::MachineBasicBlock&,
llvm::MachineBasicBlock::bundle_iterator<llvm::MachineInstr,
llvm::ilist_iterator<llvm::MachineInstr> >, llvm::DebugLoc, unsigned int,
unsigned int, bool) const + 4274916928
7 libLLVM-3.6svn.so 0x00000fff9373f620
8 libLLVM-3.6svn.so 0x00000fff937e124c
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 4267065340
9 libLLVM-3.6svn.so 0x00000fff93a7336c
llvm::FPPassManager::runOnFunction(llvm::Function&) + 4269654548
10 libLLVM-3.6svn.so 0x00000fff93a73744
llvm::FPPassManager::runOnModule(llvm::Module&) + 4269655484
11 libLLVM-3.6svn.so 0x00000fff93a73efc
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 4269657388
12 libLLVM-3.6svn.so 0x00000fff93a7465c
llvm::legacy::PassManager::run(llvm::Module&) + 4269659156
13 clang 0x0000000010486e68
clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::CodeGenOptions
const&, clang::TargetOptions const&, clang::LangOptions const&,
llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::raw_ostream*) +
4271471608
14 clang 0x0000000010477d70
15 clang 0x0000000010711ee0 clang::ParseAST(clang::Sema&, bool,
bool) + 4274074240
16 clang 0x0000000010206560
clang::ASTFrontendAction::ExecuteAction() + 4268923288
17 clang 0x00000000104764c4 clang::CodeGenAction::ExecuteAction() +
4271405980
18 clang 0x0000000010205c80 clang::FrontendAction::Execute() +
4268921088
19 clang 0x00000000101c8c4c
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 4268675668
20 clang 0x00000000101a3a70
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 4268531104
21 clang 0x000000001019779c cc1_main(llvm::ArrayRef<char const*>,
char const*, void*) + 4268482164
22 clang 0x00000000101a129c main + 4268521268
23 libc.so.6 0x00000080a18bc048
24 libc.so.6 0x00000080a18bc240 __libc_start_main + 4293375320</pre>
</div>
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