fp128 causes compilation failures when compiling for nvptx64-nvidia-cuda · Issue #95471 · llvm/llvm-project (original) (raw)

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Description

When compiling the following IR for nvptx64-nvidia-cuda (compiler explorer):

define fp128 @identity(fp128 %x) { ret fp128 %x }

LLVM will crash with the following assertion failure:

llc: /root/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:11476: void llvm::SelectionDAGISel::LowerArguments(const llvm::Function&): Assertion `InVals.size() == Ins.size() && "LowerFormalArguments didn't emit the correct number of values!"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/llc -o /app/output.s -O3 <source>
1.	Running pass 'Function Pass Manager' on module '<source>'.
2.	Running pass 'NVPTX DAG->DAG Pattern Instruction Selection' on function '@id2'
 #0 0x00000000039ffc08 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x39ffc08)
 #1 0x00000000039fd35c SignalHandler(int) Signals.cpp:0:0
 #2 0x00007616a2e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #3 0x00007616a2e969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #4 0x00007616a2e42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #5 0x00007616a2e287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #6 0x00007616a2e2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #7 0x00007616a2e39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #8 0x00000000036fd90b llvm::SelectionDAGISel::LowerArguments(llvm::Function const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x36fd90b)
 #9 0x00000000037c2335 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x37c2335)
#10 0x00000000037c2f88 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x37c2f88)
#11 0x00000000037b417f llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x37b417f)
#12 0x00000000029e2a29 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#13 0x0000000002fbc7d3 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2fbc7d3)
#14 0x0000000002fbca11 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2fbca11)
#15 0x0000000002fbd275 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2fbd275)
#16 0x000000000083a37c compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#17 0x000000000073005e main (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x73005e)
#18 0x00007616a2e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#19 0x00007616a2e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#20 0x0000000000830e9e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x830e9e)
Program terminated with signal: SIGSEGV
Compiler returned: 139