[llvm-bugs] [Bug 44974] New: Clang frontend error compiling OpenCL c++ code

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=44974

            Bug ID: 44974
           Summary: Clang frontend error compiling OpenCL c++ code
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: OpenCL
          Assignee: unassignedclangbugs at nondot.org
          Reporter: drohr at jwdt.org
                CC: anastasia.stulova at arm.com, llvm-bugs at lists.llvm.org

Created attachment 23150
  --> https://bugs.llvm.org/attachment.cgi?id=23150&action=edit
Testcase

clang fails to compile the attached test case using the following command:
/home/qon/clang-build/install/bin/clang++ -cl-std=clc++ -x cl -emit-llvm
--target=spir64-unknown-unknown -O3 -cl-denorms-are-zero -cl-mad-enable
-cl-no-signed-zeros -ferror-limit=1000 -Xclang -finclude-default-header
-Dcl_clang_storage_class_specifiers -c testfail.cl -o test.bc
(using the latest commit 659500c0c9657fc6e8d2d184b507f4e4da99297e)

If I apply the minor modifications in testok.cl from the testcase, it works, so
I assume this is a bug in clang.

The error message I am getting is:

clang++: /home/qon/clang-build/llvm-project/llvm/lib/IR/Instructions.cpp:2751:
static llvm::CastInst* llvm::CastInst::Create(llvm::Instruction::CastOps,
llvm::Value*, llvm::Type*, const llvm::Twine&, llvm::Instruction*): Assertion
`castIsValid(op, S, Ty) && "Invalid cast!"' failed.
Stack dump:
0.      Program arguments: /home/qon/clang-build/install/bin/clang++
-cl-std=clc++ -x cl -emit-llvm --target=spir64-unknown-unknown -O3
-cl-denorms-are-zero -cl-mad-enable -cl-no-signed-zeros -ferror-limit=1000
-Xclang -finclude-default-header -Dcl_clang_storage_class_specifiers -c test.cl
-o test.bc 
1.      ../TPCClusterFinder/GPUTPCCFPeakFinder.cxx:153:8: current parser token
'void'
2.      ../TPCClusterFinder/GPUTPCCFPeakFinder.cxx:91:33: LLVM IR generation of
declaration 'o2::gpu::GPUTPCCFPeakFinder::isPeak'
3.      ../TPCClusterFinder/GPUTPCCFPeakFinder.cxx:91:33: Generating code for
declaration 'o2::gpu::GPUTPCCFPeakFinder::isPeak'
4.      ../TPCClusterFinder/GPUTPCCFPeakFinder.cxx:121:6: LLVM IR generation of
compound statement ('{}')
 #0 0x0000559d797f7771 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
/home/qon/clang-build/llvm-project/llvm/lib/Support/Unix/Signals.inc:564:22
 #1 0x0000559d797f7804 PrintStackTraceSignalHandler(void*)
/home/qon/clang-build/llvm-project/llvm/lib/Support/Unix/Signals.inc:625:1
 #2 0x0000559d797f55ad llvm::sys::RunSignalHandlers()
/home/qon/clang-build/llvm-project/llvm/lib/Support/Signals.cpp:68:20
 #3 0x0000559d797f6fb3 llvm::sys::CleanupOnSignal(unsigned long)
/home/qon/clang-build/llvm-project/llvm/lib/Support/Unix/Signals.inc:361:31
 #4 0x0000559d796feda4 (anonymous
namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long)
/home/qon/clang-build/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:77:5
 #5 0x0000559d796ff26e CrashRecoverySignalHandler(int)
/home/qon/clang-build/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:383:1
 #6 0x00007fe124ebe370 __restore_rt (/lib64/libpthread.so.0+0x15370)
 #7 0x00007fe1248c71e1 raise (/lib64/libc.so.6+0x3a1e1)
 #8 0x00007fe1248af55b abort (/lib64/libc.so.6+0x2255b)
 #9 0x00007fe1248af42f (/lib64/libc.so.6+0x2242f)
#10 0x00007fe1248bead2 (/lib64/libc.so.6+0x31ad2)

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