[LLVMbugs] [Bug 4795] New: TableGen assertion

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=4795

           Summary: TableGen assertion
           Product: tools
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: TableGen
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: asl at math.spbu.ru
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=3381)
 --> (http://llvm.org/bugs/attachment.cgi?id=3381)
Test pattern

Consider the attached easy patch to ARMInstrNEON.td. If one apply it then
TableGen will fail the the following scary assertion:

$ /home/asl/proj/llvm/build_debug/Debug/bin/tblgen -I
/home/asl/proj/llvm/src/lib/Target/ARM -I /home/asl/proj/llvm/src/include -I
/home/asl/proj/llvm/src/include -I /home/asl/proj/llvm/src/lib/Target
-gen-dag-isel -o
/home/asl/proj/llvm/build_debug/lib/Target/ARM/Debug/ARMGenDAGISel.inc.tmp
/home/asl/proj/llvm/src/lib/Target/ARM/ARM.td
vtInt:  (vt:Other)<<P:Predicate_vtInt>>
tblgen: /home/asl/proj/llvm/src/utils/TableGen/DAGISelEmitter.cpp:1501: void
llvm::DAGISelEmitter::GenerateCodeForPattern(const llvm::PatternToMatch&,
std::vector<std::pair<unsigned int, std::basic_string<char,
std::char_traits<char>, std::allocator<char> > >,
std::allocator<std::pair<unsigned int, std::basic_string<char,
std::char_traits<char>, std::allocator<char> > > > >&,
std::set<std::basic_string<char, std::char_traits<char>, std::allocator<char>
>, std::less<std::basic_string<char, std::char_traits<char>,
std::allocator<char> > >, std::allocator<std::basic_string<char,
std::char_traits<char>, std::allocator<char> > > >&,
std::vector<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, std::allocator<std::basic_string<char,
std::char_traits<char>, std::allocator<char> > > >&,
std::vector<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, std::allocator<std::basic_string<char,
std::char_traits<char>, std::allocator<char> > > >&, bool&, unsigned int&):
Assertion `0 && "Error: could not find consistent types for something we" "
already decided was ok!"' failed.

removing either fmul or vdumplane node removes the assertion


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