[flang] Fortran/gfortran/regression/findloc_8.f90 triggers assertion failure on several non-x86 platforms #119420
Description
The findloc_8.f90 test from the gfortran test suite fails to compile on AArch64 and LoongArch, but compiles correctly on x86. It is possible that it fails on other, non-x86, platforms as well, but these are the only two of which I am aware. The test triggers an assertion on these platforms.
Steps to reproduce: Compile findloc_8.f90. For example, from the root of a checkout of the LLVM test suite:
$ flang -o /tmp/findloc_8 ./Fortran/gfortran/regression/findloc_8.f90Unexpected failure on AArch64:
flang: /llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1740: SDValue llvm::SelectionDAG::getConstant(const ConstantInt &, const SDLoc &, EVT, bool, bool): Assertion `Elt->getBitWidth() == EltVT.getSizeInBits() && "APInt size does not match type size!"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0. Program arguments: /flang/install/release/bin/flang -fc1 -triple aarch64-unknown-linux-gnu -emit-obj -fcolor-diagnostics -mrelocation-model pic -pic-level 2 -pic-is-pie -target-cpu generic -target-feature +outline-atomics -target-feature +v8a -target-feature +fp-armv8 -target-feature +neon -resource-dir /flang/install/release/lib/clang/20 -mframe-pointer=non-leaf -o /tmp/findloc_8-fa2183.o -x f95-cpp-input /llvm-test-suite/repo/Fortran/gfortran/regression/findloc_8.f90
1. Running pass 'Function Pass Manager' on module 'FIRModule'.
2. Running pass 'AArch64 Instruction Selection' on function '@_QQmain'
#0 0x0000ffff9ad1ccf4 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x1d5ccf4)
#1 0x0000ffff9ad1aa60 llvm::sys::RunSignalHandlers() (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x1d5aa60)
#2 0x0000ffff9ad1d45c SignalHandler(int) Signals.cpp:0:0
#3 0x0000ffffa25607a0 (linux-vdso.so.1+0x7a0)
#4 0x0000ffff98b0add8 (/lib64/libc.so.6+0x8add8)
#5 0x0000ffff98abc13c raise (/lib64/libc.so.6+0x3c13c)
#6 0x0000ffff98aa7b80 abort (/lib64/libc.so.6+0x27b80)
#7 0x0000ffff98ab54bc (/lib64/libc.so.6+0x354bc)
#8 0x0000ffff98ab552c (/lib64/libc.so.6+0x3552c)
#9 0x0000ffff9b7da144 llvm::SelectionDAG::getConstant(llvm::ConstantInt const&, llvm::SDLoc const&, llvm::EVT, bool, bool) (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x281a144)
#10 0x0000ffff9b7d8dd8 llvm::SelectionDAG::getConstant(llvm::APInt const&, llvm::SDLoc const&, llvm::EVT, bool, bool) (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x2818dd8)
#11 0x0000ffff9b6c2830 llvm::DAGTypeLegalizer::SoftenFloatRes_ConstantFP(llvm::SDNode*) LegalizeFloatTypes.cpp:0:0
#12 0x0000ffff9b6c205c llvm::DAGTypeLegalizer::SoftenFloatResult(llvm::SDNode*, unsigned int) LegalizeFloatTypes.cpp:0:0
#13 0x0000ffff9b7076fc llvm::DAGTypeLegalizer::run() LegalizeTypes.cpp:0:0
#14 0x0000ffff9b70ca34 llvm::SelectionDAG::LegalizeTypes() (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x274ca34)
#15 0x0000ffff9b83bed4 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x287bed4)
#16 0x0000ffff9b83ad98 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x287ad98)
#17 0x0000ffff9b838238 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x2878238)
#18 0x0000ffff9b835bd8 llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x2875bd8)
#19 0x0000ffff9b263484 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x22a3484)
#20 0x0000ffff9aeeae20 llvm::FPPassManager::runOnFunction(llvm::Function&) (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x1f2ae20)
#21 0x0000ffff9aef2dec llvm::FPPassManager::runOnModule(llvm::Module&) (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x1f32dec)
#22 0x0000ffff9aeeb7dc llvm::legacy::PassManagerImpl::run(llvm::Module&) (/flang/install/release/bin/../lib/libLLVM.so.20.0git+0x1f2b7dc)
#23 0x0000aaaabeceac1c Fortran::frontend::CodeGenAction::executeAction() (/flang/install/release/bin/flang+0x13cac1c)
#24 0x0000aaaabecdd7c0 Fortran::frontend::FrontendAction::execute() (/flang/install/release/bin/flang+0x13bd7c0)
#25 0x0000aaaabecc8e80 Fortran::frontend::CompilerInstance::executeAction(Fortran::frontend::FrontendAction&) (/flang/install/release/bin/flang+0x13a8e80)
#26 0x0000aaaabece1248 Fortran::frontend::executeCompilerInvocation(Fortran::frontend::CompilerInstance*) (/flang/install/release/bin/flang+0x13c1248)
#27 0x0000aaaabecc7694 fc1_main(llvm::ArrayRef<char const*>, char const*) (/flang/install/release/bin/flang+0x13a7694)
#28 0x0000aaaabecc6528 main (/flang/install/release/bin/flang+0x13a6528)
#29 0x0000ffff98aa8254 (/lib64/libc.so.6+0x28254)
#30 0x0000ffff98aa8338 __libc_start_main (/lib64/libc.so.6+0x28338)
#31 0x0000aaaabecc5770 _start (/flang/install/release/bin/flang+0x13a5770)
flang-20: error: unable to execute command: Aborted
flang-20: error: flang frontend command failed due to signal (use -v to see invocation)
flang version 20.0.0git ([email protected]:llvm-project-tlp/llvm-project.git 0ee5924d9bc01c5625a41833dd9d88b89c98d986)
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /flang/install/release/bin
Build config: +assertions
Configuration file: /flang/install/release/bin/flang.cfg
flang-20: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
flang-20: note: diagnostic msg: /tmp/findloc_8-fe84dc
flang-20: note: diagnostic msg: /tmp/findloc_8-fe84dc.sh
flang-20: note: diagnostic msg:
********************Expected results: Compilation succeeds.