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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 - [llc] crashes with "Cannot emit physreg copy instruction""
href="https://bugs.llvm.org/show_bug.cgi?id=49706">49706</a>
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<tr>
<th>Summary</th>
<td>[llc] crashes with "Cannot emit physreg copy instruction"
</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>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>Wolfgang_Pieb@playstation.sony.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>The following IR crashes with "Cannot emit physreg copy instruction" when
compiled with
llc -O0 -mcpu=btver2
The crash seems to happen as far back as llvm 6.0.
==================================================
define void @foo() {
BB:
%A1 = alloca i1, align 1
%L1 = load i1, i1* %A1, align 1
%Cmp = icmp ugt <4 x i64> zeroinitializer, zeroinitializer
br label %BB0
BB0:
%Se = sext <4 x i1> %Cmp to <4 x i64>
br label %BB1
BB1:
%Sl = select i1 %L1, <4 x i64> %Se, <4 x i64> zeroinitializer
ret void
}
===================================================
...
#9 0x0000000001ade0f0 (anonymous
namespace)::ExpandPostRA::LowerCopy(llvm::MachineInstr*)
/home/test/src/llvm/git-monorepo/llvm-project/llvm/lib/CodeGen/ExpandPostRAPseudos.cpp:169:28
#10 0x0000000001ade0f0 (anonymous
namespace)::ExpandPostRA::runOnMachineFunction(llvm::MachineFunction&)
/home/test/src/llvm/git-monorepo/llvm-project/llvm/lib/CodeGen/ExpandPostRAPseudos.cpp:214:23
#11 0x0000000001ba6e9e
llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
/home/test/src/llvm/git-monorepo/llvm-project/llvm/lib/CodeGen/MachineFunctionPass.cpp:0:13
#12 0x0000000001f6b158 llvm::FPPassManager::runOnFunction(llvm::Function&)
/home/test/src/llvm/git-monorepo/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1439:27
#13 0x0000000001f71a48 llvm::FPPassManager::runOnModule(llvm::Module&)
/home/test/src/llvm/git-monorepo/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1485:13
#14 0x0000000001f6b7f8 (anonymous
namespace)::MPPassManager::runOnModule(llvm::Module&)
/home/test/src/llvm/git-monorepo/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:0:27
#15 0x0000000001f6b7f8 llvm::legacy::PassManagerImpl::run(llvm::Module&)
/home/test/src/llvm/git-monorepo/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:542:44
#16 0x00000000007622a8 compileModule(char**, llvm::LLVMContext&)
/home/test/src/llvm/git-monorepo/llvm-project/llvm/tools/llc/llc.cpp:690:49
...</pre>
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