https://bugs.llvm.org/show_bug.cgi?id=41372
Bug ID: 41372
Summary: [Subreg liveness] Assertion `INext != E && "Must have
following segment"' failed
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Register Allocator
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Created attachment 21726
--> https://bugs.llvm.org/attachment.cgi?id=21726&action=edit
reduced testcase
llc -mcpu=z13 -O3 -o out.s -misched=ilpmin -systemz-subreg-liveness
tc_musthavefollseg.ll
llc: llvm/llvm-dev/lib/CodeGen/LiveIntervals.cpp:1142: void
llvm::LiveIntervals::HMEditor::handleMoveDown(llvm::LiveRange&)
: Assertion `INext != E && "Must have following segment"' failed.
Stack dump:
0. Program arguments: llc -mcpu=z13 -O3 -o out.s -misched=ilpmin
-systemz-subreg-liveness tc_musthavefollseg.ll
2. Running pass 'Machine Instruction Scheduler' on function '@main'
...
#9 0x000002aa3522b370
llvm::LiveIntervals::HMEditor::updateRange(llvm::LiveRange&, unsigned int,
llvm::LaneBitmask)
#10 0x000002aa3522bae4
llvm::LiveIntervals::HMEditor::updateAllRanges(llvm::MachineInstr*)
#11 0x000002aa3522eb50 llvm::LiveIntervals::handleMove(llvm::MachineInstr&,
bool)
#12 0x000002aa353563d4
llvm::ScheduleDAGMI::moveInstruction(llvm::MachineInstr*,
llvm::MachineInstrBundleIterator<llvm::MachineInstr, false>)
...
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