[llvm-bugs] [Bug 48609] New: [MachineScheduler] UNREACHABLE executed at RegisterPressure.cpp:1147!

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48609

            Bug ID: 48609
           Summary: [MachineScheduler] UNREACHABLE executed at
                    RegisterPressure.cpp:1147!
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: paulsson at linux.vnet.ibm.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 24317
  --> https://bugs.llvm.org/attachment.cgi?id=24317&action=edit
reduced testcase

llc -mcpu=arch13 -O3 -disable-machine-dce -verify-misched -stress-sched 
tc_misched_regpress.ll

PDiff: GR32Bit 1    GRH32Bit 1
DELTA: %1:gr64bit = COPY $r2d
Excess1 GRX32Bit -2
RegP Delta Mismatch
UNREACHABLE executed at llvm/lib/CodeGen/RegisterPressure.cpp:1147!

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