[LLVMbugs] [Bug 22383] New: Invalid constantexpr bitcast when compiling for -target nvptx -x cuda

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22383

            Bug ID: 22383
           Summary: Invalid constantexpr bitcast when compiling for
                    -target nvptx -x cuda
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: yaron.keren at gmail.com
                CC: justin.holewinski at gmail.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Compiling this one-line file example.cpp:

 __attribute__((device)) __attribute__((__used__)) int a[] = {};

with r227430:

 clang -target nvptx -x cuda example.cpp -S -Xclang -fcuda-is-device

results in:

 Assertion failed: CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
"Invalid constantexpr bitcast!", file C:\llvm-clean\lib\IR\Constants.cpp, line
1796

printing List[0] in emitUsed is:

 @a = addrspace(1) global [0 x i32] zeroinitializer, align 4

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