[LLVMbugs] [Bug 4942] New: Crash during bootstrap

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Wed Sep 9 22:21:14 PDT 2009


           Summary: Crash during bootstrap
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Core LLVM classes
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: daniel at zuster.org
                CC: dpatel at apple.com, llvmbugs at cs.uiuc.edu,
                    deeppatel1987 at gmail.com

This is a minimized test case that Sandeep me based on a crash he is seeing
during bootstrap of llvm-gcc.

It is pretty aggressively minimized, and is very sensitive to any further
changes in the types. I have attached the version of llvm-gcc that this
reproduces with (on Darwin).
ddunbar at giles:delta$ ./cc1plus -g t.cpp
 bool EVT::isPow2VectorType() const void DAGCombiner::AddToWorkList(SDNode*)
SDValue DAGCombiner::CombineTo(SDValue) SDValue f0(SDValue)
Analyzing compilation unitPerforming interprocedural optimizations
Assembling functions:
 SDValue DAGCombiner::CombineTo(SDValue)
t.cpp: In member function 'SDValue DAGCombiner::CombineTo(SDValue)':
t.cpp:24: internal compiler error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://llvm.org/bugs/> for instructions.

Sandeep, can you see if this test case also crashes with your cc1plus?

Devang, can you try looking at this test case in gdb to determine why it is
crashing? Hopefully that will give enough information to explain what the crash
is, and how to fix it.

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