[LLVMbugs] [Bug 3730] New: llvm-gcc crash with incomplete enum type

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=3730

           Summary: llvm-gcc crash with incomplete enum type
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sharparrow1 at yahoo.com
                CC: llvmbugs at cs.uiuc.edu


Testcase:
enum y b(void);
struct x {enum y (*test)(void);} z = {b};
enum y {AAA,BBB};
int a() { return z.test(); }

cc1: Instructions.cpp:2164: static llvm::Instruction::CastOps
llvm::CastInst::getCastOpcode(const llvm::Value*, bool, const llvm::Type*,
bool): Assertion `SrcTy->isFirstClassType() && DestTy->isFirstClassType() &&
"Only first class types are castable!"' failed.
<stdin>: In function ‘a’:
<stdin>:4: internal compiler error: Aborted

Another similar testcase:
enum y b(void);
struct x {enum y (*test)(void);} z = {b};
enum y {AAA,BBB};
enum y b(void) { return BBB; }

cc1: Function.cpp:164: llvm::Function::Function(const llvm::FunctionType*,
llvm::GlobalValue::LinkageTypes, const std::string&, llvm::Module*): Assertion
`FunctionType::isValidReturnType(getReturnType()) &&
!isa<OpaqueType>(getReturnType()) && "invalid return type"' failed.
<stdin>: In function ‘b’:
<stdin>:4: internal compiler error: Aborted


These are contrived testcases I came up with while comparing the output of
llvm-gcc and clang for incomplete function types, so probably not a serious
issue, but it might be worth looking at.


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