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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [X86] MCInst assertion failure "This is not a register operand!""
href="https://bugs.llvm.org/show_bug.cgi?id=48888">48888</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[X86] MCInst assertion failure "This is not a register operand!"
</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>Linux
</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>Backend: X86
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nikita.ppv@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, pengfei.wang@intel.com, spatel+llvm@rotateright.com
</td>
</tr></table>
<p>
<div>
<pre>target datalayout =
"e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define void @test(i64* %p) nounwind {
bb:
%i = load i64, i64* %p, align 8, !range !0
%i1 = and i64 %i, 6
%i2 = icmp eq i64 %i1, 2
br i1 %i2, label %bb3, label %bb5
bb3: ; preds = %bb
%i4 = icmp ne {}* undef, null
br label %bb5
bb5: ; preds = %bb3, %bb
br label %bb6
bb6: ; preds = %bb5
br i1 %i2, label %bb7, label %bb9
bb7: ; preds = %bb6
%i8 = getelementptr inbounds i64, i64* undef, i64 5
br label %bb9
bb9: ; preds = %bb7, %bb6
ret void
}
!0 = !{i64 0, i64 5}
llc %s:
llc: /home/nikic/llvm-project/llvm/include/llvm/MC/MCInst.h:65: unsigned int
llvm::MCOperand::getReg() const: Assertion `isReg() && "This is not a register
operand!"' failed.
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: build/bin/llc -debug test135.ll
1. Running pass 'Function Pass Manager' on module 'test135.ll'.
2. Running pass 'X86 Assembly Printer' on function '@test'
#0 0x000055cc218af481 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(build/bin/llc+0x2e80481)
#1 0x000055cc218ad054 llvm::sys::RunSignalHandlers() (build/bin/llc+0x2e7e054)
#2 0x000055cc218ad1cb SignalHandler(int) (build/bin/llc+0x2e7e1cb)
#3 0x00007f4b42be53c0 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x153c0)
#4 0x00007f4b4268518b raise
/build/glibc-ZN95T4/glibc-2.31/signal/../sysdeps/unix/sysv/linux/raise.c:51:1
#5 0x00007f4b42664859 abort /build/glibc-ZN95T4/glibc-2.31/stdlib/abort.c:81:7
#6 0x00007f4b42664729 get_sysdep_segment_value
/build/glibc-ZN95T4/glibc-2.31/intl/loadmsgcat.c:509:8
#7 0x00007f4b42664729 _nl_load_domain
/build/glibc-ZN95T4/glibc-2.31/intl/loadmsgcat.c:970:34
#8 0x00007f4b42675f36 (/lib/x86_64-linux-gnu/libc.so.6+0x36f36)
#9 0x000055cc20715a88 (anonymous
namespace)::X86MCCodeEmitter::emitPrefixImpl(unsigned int&, llvm::MCInst
const&, llvm::MCSubtargetInfo const&, llvm::raw_ostream&) const
(build/bin/llc+0x1ce6a88)
#10 0x000055cc2071708f (anonymous
namespace)::X86MCCodeEmitter::encodeInstruction(llvm::MCInst const&,
llvm::raw_ostream&, llvm::SmallVectorImpl<llvm::MCFixup>&,
llvm::MCSubtargetInfo const&) const (build/bin/llc+0x1ce808f)
#11 0x000055cc202229ad
llvm::X86AsmPrinter::StackMapShadowTracker::count(llvm::MCInst&,
llvm::MCSubtargetInfo const&, llvm::MCCodeEmitter*) (.part.0)
(build/bin/llc+0x17f39ad)
#12 0x000055cc2022b4f1 llvm::X86AsmPrinter::emitInstruction(llvm::MachineInstr
const*) (build/bin/llc+0x17fc4f1)
#13 0x000055cc209bd174 llvm::AsmPrinter::emitFunctionBody()
(build/bin/llc+0x1f8e174)
#14 0x000055cc2021c7e3
llvm::X86AsmPrinter::runOnMachineFunction(llvm::MachineFunction&)
(build/bin/llc+0x17ed7e3)
#15 0x000055cc20bee20c
llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
(build/bin/llc+0x21bf20c)
#16 0x000055cc21082d78 llvm::FPPassManager::runOnFunction(llvm::Function&)
(build/bin/llc+0x2653d78)</pre>
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