[llvm-bugs] [Bug 25917] New: findNeededSubprograms segfaults on compile units without subprograms

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=25917

            Bug ID: 25917
           Summary: findNeededSubprograms segfaults on compile units
                    without subprograms
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Linker
          Assignee: unassignedbugs at nondot.org
          Reporter: andrew.b.adams at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

findNeededSubprograms in IRMover.cpp assumes that the CU->getSubprograms() is
not null and dereferences it, but it is null sometimes in my experience. This
probably happens when the compile unit has no subprograms.

Inserting:

if (!CU->getSubprograms()) continue;

just before the IRMover.cpp line 1196 fixes it for me

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