An error occurred while performing AST parsing on the line string fileName = picturePath;.

[ljtodo]

Maybe the implicit construct semantics of C++ are not supported, and ClangIR may not properly parse implicitly called constructors, causing problems in handling default parameters or lvalue operations called by implicit constructors.
https://godbolt.org/

C++ source:

#include <iostream> 
#include <fstream> 
#include <cstring> 
#include <map> 
#include <math.h> 
using namespace std;

size_t pictureDataSize = 0; 
void *pictureHostData; 
void *pictureDeviceData;

void ReadPictureTotHost(const char *picturePath) 
{
  string fileName = picturePath; 
  ifstream binFile(fileName, ifstream::binary); 
  binFile.seekg(0, binFile.end); 
  pictureDataSize = binFile.tellg(); 
  binFile.seekg(0, binFile.beg); 
  binFile.read((char*)pictureHostData, pictureDataSize); 
  binFile.close();
}

the output:

clang version 20.0.0git (https://github.com/llvm/clangir.git b414f2b7d8b8b97b626d5b0b2bf448a3f61d39ff)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/compiler-explorer/clang-clangir-trunk-20241108/bin
Build config: +assertions
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
 (in-process)
 "/opt/compiler-explorer/clang-clangir-trunk-20241108/bin/clang-20" -cc1 -triple x86_64-unknown-linux-gnu -S -disable-free -clear-ast-before-backend -main-file-name example.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -fno-verbose-asm -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debug-info-kind=constructor -dwarf-version=4 -debugger-tuning=gdb -fdebug-compilation-dir=/app -v -fcoverage-compilation-dir=/app -resource-dir /opt/compiler-explorer/clang-clangir-trunk-20241108/lib/clang/20 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/x86_64-linux-gnu/c++/11 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/backward -internal-isystem /opt/compiler-explorer/clang-clangir-trunk-20241108/lib/clang/20/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdeprecated-macro -ferror-limit 19 -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -fcolor-diagnostics -fclangir -emit-cir -mllvm --x86-asm-syntax=intel -mmlir --mlir-print-ir-before-all -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /app/output.s -x c++ <source>
clang -cc1 version 20.0.0git based upon LLVM 20.0.0git default target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11
 /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/x86_64-linux-gnu/c++/11
 /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/backward
 /opt/compiler-explorer/clang-clangir-trunk-20241108/lib/clang/20/include
 /usr/local/include
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
loc("<source>":14:21): error: l-value not implemented for 'CXXDefaultArgExpr'
clang++: /root/llvm-project/clang/lib/CIR/CodeGen/CIRGenExpr.cpp:2548: cir::LValue cir::CIRGenFunction::buildLValue(const clang::Expr*): Assertion `0 && "not implemented"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /opt/compiler-explorer/clang-clangir-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S -Xclang -fclangir -fcolor-diagnostics -fno-crash-diagnostics -Xclang -emit-cir -v -mmlir --mlir-print-ir-before-all <source>
1.	<eof> parser at end of file
2.	<source>:12:6: LLVM IR generation of declaration 'ReadPictureTotHost'
 #0 0x0000000002bd8cf8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x2bd8cf8)
 #1 0x0000000002bd69fc llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x2bd69fc)
 #2 0x0000000002b2c508 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x000077bb98442520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x000077bb984969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x000077bb98442476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x000077bb984287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x000077bb9842871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x000077bb98439e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x00000000042ac60d cir::CIRGenFunction::buildLValue(clang::Expr const*) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x42ac60d)
#10 0x00000000042ae33b cir::CIRGenFunction::buildReferenceBindingToExpr(clang::Expr const*) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x42ae33b)
#11 0x00000000042797ed cir::CIRGenFunction::buildCallArg(cir::CallArgList&, clang::Expr const*, clang::QualType) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x42797ed)
#12 0x0000000004279f26 cir::CIRGenFunction::buildCallArgs(cir::CallArgList&, cir::CIRGenFunction::PrototypeWrapper, llvm::iterator_range<clang::Stmt::CastIterator<clang::Expr, clang::Expr const* const, clang::Stmt const* const>>, cir::CIRGenFunction::AbstractCallee, unsigned int, cir::CIRGenFunction::EvaluationOrder) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x4279f26)
#13 0x0000000004365b2f cir::CIRGenFunction::buildCXXConstructorCall(clang::CXXConstructorDecl const*, clang::CXXCtorType, bool, bool, cir::AggValueSlot, clang::CXXConstructExpr const*) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x4365b2f)
#14 0x00000000042e1cee cir::CIRGenFunction::buildCXXConstructExpr(clang::CXXConstructExpr const*, cir::AggValueSlot) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x42e1cee)
#15 0x00000000042ce59e (anonymous namespace)::AggExprEmitter::VisitCXXConstructExpr(clang::CXXConstructExpr const*) CIRGenExprAgg.cpp:0:0
#16 0x00000000042d7688 (anonymous namespace)::AggExprEmitter::VisitCastExpr(clang::CastExpr*) CIRGenExprAgg.cpp:0:0
#17 0x00000000042dabb8 (anonymous namespace)::AggExprEmitter::VisitExprWithCleanups(clang::ExprWithCleanups*) CIRGenExprAgg.cpp:0:0
#18 0x00000000042d3774 cir::CIRGenFunction::buildAggExpr(clang::Expr const*, cir::AggValueSlot) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x42d3774)
#19 0x0000000004289afe cir::CIRGenFunction::buildExprAsInit(clang::Expr const*, clang::ValueDecl const*, cir::LValue, bool) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x4289afe)
#20 0x000000000428df79 cir::CIRGenFunction::buildAutoVarInit(cir::CIRGenFunction::AutoVarEmission const&) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x428df79)
#21 0x00000000042940af cir::CIRGenFunction::buildVarDecl(clang::VarDecl const&) (.part.0) CIRGenDecl.cpp:0:0
#22 0x000000000429457e cir::CIRGenFunction::buildDecl(clang::Decl const&) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x429457e)
#23 0x000000000431ccbf cir::CIRGenFunction::buildDeclStmt(clang::DeclStmt const&) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x431ccbf)
#24 0x0000000004322edf cir::CIRGenFunction::buildStmt(clang::Stmt const*, bool, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x4322edf)
#25 0x00000000043257f7 cir::CIRGenFunction::buildCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, cir::AggValueSlot) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x43257f7)
#26 0x00000000042ff9c0 cir::CIRGenFunction::buildFunctionBody(clang::Stmt const*) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x42ff9c0)
#27 0x000000000430b7a5 cir::CIRGenFunction::generateCode(clang::GlobalDecl, mlir::cir::FuncOp, cir::CIRGenFunctionInfo const&) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x430b7a5)
#28 0x0000000004252652 cir::CIRGenModule::buildGlobalFunctionDefinition(clang::GlobalDecl, mlir::Operation*) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x4252652)
#29 0x0000000004253d27 cir::CIRGenModule::buildGlobal(clang::GlobalDecl) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x4253d27)
#30 0x0000000004254346 cir::CIRGenModule::buildTopLevelDecl(clang::Decl*) (.part.0) CIRGenModule.cpp:0:0
#31 0x00000000042385d9 cir::CIRGenerator::HandleTopLevelDecl(clang::DeclGroupRef) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x42385d9)
#32 0x000000000411caaf cir::CIRGenConsumer::HandleTopLevelDecl(clang::DeclGroupRef) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x411caaf)
#33 0x000000000658b184 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x658b184)
#34 0x000000000411ed48 cir::CIRGenAction::ExecuteAction() (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x411ed48)
#35 0x00000000037f9819 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x37f9819)
#36 0x00000000037765be clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x37765be)
#37 0x00000000038df9bc clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x38df9bc)
#38 0x0000000001090e1f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x1090e1f)
#39 0x0000000001088cfa ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#40 0x000000000357f599 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#41 0x0000000002b2c9b4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x2b2c9b4)
#42 0x000000000357fb8f clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#43 0x0000000003545d1d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x3545d1d)
#44 0x0000000003546e0d clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x3546e0d)
#45 0x000000000354e2b5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x354e2b5)
#46 0x000000000108de39 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x108de39)
#47 0x0000000000fa17f4 main (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0xfa17f4)
#48 0x000077bb98429d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#49 0x000077bb98429e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#50 0x00000000010887ae _start (/opt/compiler-explorer/clang-clangir-trunk/bin/clang+++0x10887ae)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

[bcardosolopes]

@ljtodo closing this given we already have llvm/clangir#1181