[llvm-bugs] [Bug 49129] New: Greedy RegAlloc fails with "Overlapping insert" assertion

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49129

            Bug ID: 49129
           Summary: Greedy RegAlloc fails with "Overlapping insert"
                    assertion
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Register Allocator
          Assignee: unassignedbugs at nondot.org
          Reporter: Matthew.Arsenault at amd.com
                CC: llvm-bugs at lists.llvm.org, quentin.colombet at gmail.com

Created attachment 24510
  --> https://bugs.llvm.org/attachment.cgi?id=24510&action=edit
Testcase

Attached testcase fails with

llc: /home/matt/src/llvm-project/llvm/include/llvm/ADT/IntervalMap.h:644:
unsigned int llvm::IntervalMapImpl::LeafNode<llvm::SlotIndex,
llvm::LiveInterval *, 8,
llvm::IntervalMapInfo<llvm::SlotIndex>>::insertFrom(unsigned int &, unsigned
int, KeyT, KeyT, ValT) [KeyT = llvm::SlotIndex, ValT = llvm::LiveInterval *, N
= 8, Traits = llvm::IntervalMapInfo<llvm::SlotIndex>]: Assertion `(i == Size ||
Traits::stopLess(b, start(i))) && "Overlapping insert"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash
backtrace.

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