[llvm-bugs] [Bug 50941] New: TargetLoweringBase::getRegClassFor Assertion "This value type is not natively supported!"

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=50941

            Bug ID: 50941
           Summary: TargetLoweringBase::getRegClassFor Assertion "This
                    value type is not natively supported!"
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: gcc.j.kelling at hzdr.de
                CC: llvm-bugs at lists.llvm.org

Created attachment 24989
  --> https://bugs.llvm.org/attachment.cgi?id=24989&action=edit
object file triggering linker error

When linking a code (single unit) compiled OpenMP target=amdgcn-amd-amdhsa with
trunk got the following ICE:

```
llc:
/home/kelling/checkout/llvm/trunk/llvm-project/llvm/include/llvm/CodeGen/TargetLowering.h:855:
virtual const llvm::TargetRegisterClass*
llvm::TargetLoweringBase::getRegClassFor(llvm::MVT, bool) const: Assertion `RC
&& "This value type is not natively supported!"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash
backtrace.
Stack dump:
0.      Program arguments:
/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc
monteCarloIntegration.cpp-openmp-amdgcn-amd-amdhsa-gfx906-linked.bc
-mtriple=amdgcn-amd-amdhsa -mcpu=gfx906 -filetype=asm -o
monteCarloIntegration.cpp-openmp-amdgcn-amd-amdhsa-gfx906.s
1.      Running pass 'CallGraph Pass Manager' on module
'monteCarloIntegration.cpp-openmp-amdgcn-amd-amdhsa-gfx906-linked.bc'.
2.      Running pass 'AMDGPU DAG->DAG Pattern Instruction Selection' on
function '@_ZSt3loge'
 #0 0x0000560e8af24e3f PrintStackTraceSignalHandler(void*) Signals.cpp:0:0
 #1 0x0000560e8af2268d SignalHandler(int) Signals.cpp:0:0
 #2 0x00007f06fc586980 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12980)
 #3 0x00007f06fb22afb7 raise
/build/glibc-S9d2JN/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
 #4 0x00007f06fb22c921 abort /build/glibc-S9d2JN/glibc-2.27/stdlib/abort.c:81:0
 #5 0x00007f06fb21c48a __assert_fail_base
/build/glibc-S9d2JN/glibc-2.27/assert/assert.c:89:0
 #6 0x00007f06fb21c502 (/lib/x86_64-linux-gnu/libc.so.6+0x30502)
 #7 0x0000560e89c2a3db
(/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc+0xac43db)
 #8 0x0000560e8ac52b4e llvm::FunctionLoweringInfo::CreateRegs(llvm::Type*,
bool)
(/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc+0x1aecb4e)
 #9 0x0000560e8ac47cf6
llvm::FunctionLoweringInfo::InitializeRegForValue(llvm::Value const*)
(/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc+0x1ae1cf6)
#10 0x0000560e8acce849 llvm::SelectionDAGISel::LowerArguments(llvm::Function
const&)
(/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc+0x1b68849)
#11 0x0000560e8ad5553a
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&)
(/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc+0x1bef53a)
#12 0x0000560e8ad564eb
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&)
(.part.958) SelectionDAGISel.cpp:0:0
#13 0x0000560e89d3f76a (anonymous
namespace)::AMDGPUDAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&)
AMDGPUISelDAGToDAG.cpp:0:0
#14 0x0000560e8a307f26
llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
(/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc+0x11a1f26)
#15 0x0000560e8a785bf6 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc+0x161fbf6)
#16 0x0000560e89ec6ae4 (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&) CallGraphSCCPass.cpp:0:0
#17 0x0000560e8a786d60 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc+0x1620d60)
#18 0x0000560e897ff104 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#19 0x0000560e8977dc26 main
(/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc+0x617c26)
#20 0x00007f06fb20dbf7 __libc_start_main
/build/glibc-S9d2JN/glibc-2.27/csu/../csu/libc-start.c:344:0
#21 0x0000560e897f661a _start
(/home/kelling/checkout/llvm/trunk/llvm-project/install/bin/llc+0x69061a)
clang-13: error: unable to execute command: Aborted (core dumped)
clang-13: error: amdgcn-link command failed due to signal (use -v to see
invocation)
clang version 13.0.0 (https://github.com/llvm/llvm-project.git
b062fff87adcfa2e252cbce43d92b61b76614bd5)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/kelling/checkout/llvm/trunk/llvm-project/install/bin
clang-13: note: diagnostic msg: Error generating preprocessed source(s).
```

This can be reproduced using the attached object file with the command:
```
clang++  -fopenmp -fopenmp=libomp -fopenmp-targets=amdgcn-amd-amdhsa
-Xopenmp-target=amdgcn-amd-amdhsa -march=gfx906 --save-temps  -fopenmp
-fopenmp-version=40 monteCarloIntegration.cpp.o  -o monteCarloIntegration 
/usr/lib/x86_64-linux-gnu/librt.so
```

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