[PATCH] D118020: [RISCV] Set CostPerUse for floating point registers

Mon Jan 24 04:45:45 PST 2022

asb added a comment.

This is causing multiple compiler-time failures (assertions) for me on the GCC torture suite. e.g. 930608-1.c for rv32imafdc with the ilp32 ABI at O{1,2,3,s}. pr44942.c fails similarly for rv32imafdc with the ilp32d ABI at O{1,2,3,s}. It seems likely it's unmasking a bug elsewhere, though I haven't done any more delving.

  clang: /home/asb/llvm-project/llvm/include/llvm/CodeGen/LiveInterval.h:378: llvm::SlotIndex llvm::LiveRange::beginIndex() const: Assertion `!empty() && "Call to beginIndex() on empty range."' failed.
  PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
  Stack dump:
  0.	Program arguments: /home/asb/llvm-project/build/default/bin/clang -cc1 -triple riscv32-unknown-linux-gnu -S -save-temps=obj -disable-free -clear-ast-before-backend -main-file-name 930608-1.c -mrelocation-model static -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -target-feature +m -target-feature +a -target-feature +f -target-feature +d -target-feature +c -target-feature +relax -target-feature -save-restore -target-abi ilp32 -msmall-data-limit 8 -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -fcoverage-compilation-dir=/home/asb/torture -resource-dir /home/asb/llvm-project/build/release/lib/clang/14.0.0 -O1 -fdebug-compilation-dir=/home/asb/torture -ferror-limit 19 -fno-signed-char -fgnuc-version=4.2.1 -Qn -faddrsig -o ./output_rv32imafdc_ilp32_O1/930608-1.s 930608-1.c
  1.	<eof> parser at end of file
  2.	Code generation
  3.	Running pass 'Function Pass Manager' on module '930608-1.c'.
  4.	Running pass 'Greedy Register Allocator' on function '@f'
   #0 0x00007f8398acc207 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/asb/llvm-project/llvm/lib/Support/Unix/Signals.inc:565:11
   #1 0x00007f8398acc41b PrintStackTraceSignalHandler(void*) /home/asb/llvm-project/llvm/lib/Support/Unix/Signals.inc:632:1
   #2 0x00007f8398aca7d7 llvm::sys::RunSignalHandlers() /home/asb/llvm-project/llvm/lib/Support/Signals.cpp:97:5
   #3 0x00007f8398accc31 SignalHandler(int) /home/asb/llvm-project/llvm/lib/Support/Unix/Signals.inc:0:3
   #4 0x00007f83a1c01870 __restore_rt sigaction.c:0:0
   #5 0x00007f839815fd22 raise (/usr/lib/libc.so.6+0x3cd22)
   #6 0x00007f8398149862 abort (/usr/lib/libc.so.6+0x26862)
   #7 0x00007f8398149747 _nl_load_domain.cold loadmsgcat.c:0:0
   #8 0x00007f8398158616 (/usr/lib/libc.so.6+0x35616)
   #9 0x00007f839f29bbf4 llvm::LiveRange::beginIndex() const /home/asb/llvm-project/llvm/include/llvm/CodeGen/LiveInterval.h:0:7
  #10 0x00007f839f2aa9ce llvm::LiveIntervals::intervalIsInOneMBB(llvm::LiveInterval const&) const /home/asb/llvm-project/llvm/lib/CodeGen/LiveIntervals.cpp:837:24
  #11 0x00007f839f702144 llvm::DefaultEvictionAdvisor::canEvictInterferenceBasedOnCost(llvm::LiveInterval&, llvm::MCRegister, bool, llvm::EvictionCost&, llvm::SmallSet<llvm::Register, 16u, std::less<llvm::Register> > const&) const /home/asb/llvm-project/llvm/lib/CodeGen/RegAllocGreedy.cpp:500:23
  #12 0x00007f839f703368 llvm::DefaultEvictionAdvisor::tryFindEvictionCandidate(llvm::LiveInterval&, llvm::AllocationOrder const&, unsigned char, llvm::SmallSet<llvm::Register, 16u, std::less<llvm::Register> > const&) const /home/asb/llvm-project/llvm/lib/CodeGen/RegAllocGreedy.cpp:783:9
  #13 0x00007f839f7019a8 llvm::RAGreedy::tryEvict(llvm::LiveInterval&, llvm::AllocationOrder&, llvm::SmallVectorImpl<llvm::Register>&, unsigned char, llvm::SmallSet<llvm::Register, 16u, std::less<llvm::Register> > const&) /home/asb/llvm-project/llvm/lib/CodeGen/RegAllocGreedy.cpp:809:39
  #14 0x00007f839f7012c7 llvm::RAGreedy::tryAssign(llvm::LiveInterval&, llvm::AllocationOrder&, llvm::SmallVectorImpl<llvm::Register>&, llvm::SmallSet<llvm::Register, 16u, std::less<llvm::Register> > const&) /home/asb/llvm-project/llvm/lib/CodeGen/RegAllocGreedy.cpp:408:25
  #15 0x00007f839f70bd31 llvm::RAGreedy::selectOrSplitImpl(llvm::LiveInterval&, llvm::SmallVectorImpl<llvm::Register>&, llvm::SmallSet<llvm::Register, 16u, std::less<llvm::Register> >&, unsigned int) /home/asb/llvm-project/llvm/lib/CodeGen/RegAllocGreedy.cpp:2629:11
  #16 0x00007f839f70c79d llvm::RAGreedy::selectOrSplit(llvm::LiveInterval&, llvm::SmallVectorImpl<llvm::Register>&) /home/asb/llvm-project/llvm/lib/CodeGen/RegAllocGreedy.cpp:2361:20
  #17 0x00007f839f70c94c non-virtual thunk to llvm::RAGreedy::selectOrSplit(llvm::LiveInterval&, llvm::SmallVectorImpl<llvm::Register>&) /home/asb/llvm-project/llvm/lib/CodeGen/RegAllocGreedy.cpp:0:0
  #18 0x00007f839f6e1ffd llvm::RegAllocBase::allocatePhysRegs() /home/asb/llvm-project/llvm/lib/CodeGen/RegAllocBase.cpp:112:35
  #19 0x00007f839f70f7cb llvm::RAGreedy::runOnMachineFunction(llvm::MachineFunction&) /home/asb/llvm-project/llvm/lib/CodeGen/RegAllocGreedy.cpp:2942:3
  #20 0x00007f839f42c4cc llvm::MachineFunctionPass::runOnFunction(llvm::Function&) /home/asb/llvm-project/llvm/lib/CodeGen/MachineFunctionPass.cpp:72:8
  #21 0x00007f8399c7a6fd llvm::FPPassManager::runOnFunction(llvm::Function&) /home/asb/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1435:23
  #22 0x00007f8399c7fcdf llvm::FPPassManager::runOnModule(llvm::Module&) /home/asb/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1481:16
  #23 0x00007f8399c7b0aa (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/asb/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1550:23
  #24 0x00007f8399c7abbd llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/asb/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:540:16
  #25 0x00007f8399c7ffe1 llvm::legacy::PassManager::run(llvm::Module&) /home/asb/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1677:3
  #26 0x00007f83a0076ef5 (anonymous namespace)::EmitAssemblyHelper::RunCodegenPipeline(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >&, std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile> >&) /home/asb/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1535:3
  #27 0x00007f83a006ecb4 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) /home/asb/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1566:7
  #28 0x00007f83a006d3f5 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) /home/asb/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1727:5
  #29 0x00007f83a083b1ef clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/asb/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:370:7
  #30 0x00007f8392b908ef clang::ParseAST(clang::Sema&, bool, bool) /home/asb/llvm-project/clang/lib/Parse/ParseAST.cpp:178:12
  #31 0x00007f839d4b1a2c clang::ASTFrontendAction::ExecuteAction() /home/asb/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1076:1
  #32 0x00007f83a08342eb clang::CodeGenAction::ExecuteAction() /home/asb/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:1107:5
  #33 0x00007f839d4b1359 clang::FrontendAction::Execute() /home/asb/llvm-project/clang/lib/Frontend/FrontendAction.cpp:971:7
  #34 0x00007f839d3b669f clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/asb/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1030:23
  #35 0x00007f83a1bd1c44 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/asb/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:261:8
  #36 0x00005607d246ddcc cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/asb/llvm-project/clang/tools/driver/cc1_main.cpp:246:13
  #37 0x00005607d246018a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&) /home/asb/llvm-project/clang/tools/driver/driver.cpp:317:5
  #38 0x00005607d245f1d9 main /home/asb/llvm-project/clang/tools/driver/driver.cpp:388:5
  #39 0x00007f839814ab25 __libc_start_main (/usr/lib/libc.so.6+0x27b25)
  #40 0x00005607d245e9be _start (/home/asb/llvm-project/build/default/bin/clang+0x3d9be)
  Aborted (core dumped)

Repository:
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