llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT--> @llvm/pr-subscribers-clang-codegen Author: None (Pavithra029) <details> <summary>Changes</summary> --- Full diff: https://github.com/llvm/llvm-project/pull/144622.diff 1 Files Affected: - (modified) clang/lib/CodeGen/CodeGenModule.cpp (+100) ``````````diff diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp index c005d3322ed7a..577cb6f0abd2c 100644 --- a/clang/lib/CodeGen/CodeGenModule.cpp +++ b/clang/lib/CodeGen/CodeGenModule.cpp @@ -1472,6 +1472,106 @@ void CodeGenModule::Release() { } } } + + // 1. Get source file name + /* std::string FileName = getModule().getSourceFileName(); // like "foo.c" + llvm::StringRef BaseName = llvm::sys::path::filename(FileName); + + // 2. Create variable name like __cli_foo_c + std::string VarName = "__cli_" + BaseName.str(); + std::replace(VarName.begin(), VarName.end(), '.', '_'); + + // 3. Get the compilation command line from options + std::string CmdLineStr; + for (const std::string &Arg : CodeGenOpts.CommandLineArgs) { + CmdLineStr += Arg + " "; + } + + // 4. Create LLVM IR string global + llvm::Constant *CmdStr = llvm::ConstantDataArray::getString(getLLVMContext(), CmdLineStr, true); + // 1. Prepare internal string global variable +auto *GV = new llvm::GlobalVariable( + getModule(), + CmdStr->getType(), + true, + llvm::GlobalValue::InternalLinkage, + CmdStr, + VarName + ".data" +); +GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); + +// 2. Create external pointer global pointing to internal string +llvm::Constant *Zero = llvm::ConstantInt::get(llvm::Type::getInt32Ty(getLLVMContext()), 0); +llvm::Constant *Indices[] = {Zero, Zero}; +llvm::Constant *PtrToStr = llvm::ConstantExpr::getGetElementPtr(CmdStr->getType(), GV, Indices); + +auto *ExternGV = new llvm::GlobalVariable( + getModule(), + PtrToStr->getType(), + true, + llvm::GlobalValue::ExternalLinkage, + PtrToStr, + VarName +); +ExternGV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); +(void)ExternGV; + llvm::errs() << "✅ Emitting __cli global variable!\n"; + + */ + + // === BEGIN: Emit global __cli_<file> variable === + +std::string FileName = getModule().getSourceFileName(); +llvm::StringRef BaseName = llvm::sys::path::filename(FileName); +std::string VarName = "__cli_" + BaseName.str(); +std::replace(VarName.begin(), VarName.end(), '.', '_'); + +// Join command line args into one string +std::string CmdLineStr; +for (const std::string &Arg : CodeGenOpts.CommandLineArgs) { + CmdLineStr += Arg + " "; +} + +// Step 1: Create string constant (char[] data) +llvm::Constant *CmdStr = llvm::ConstantDataArray::getString(getLLVMContext(), CmdLineStr, true); + +// Step 2: Emit internal variable: @__cli_foo_c.data +auto *DataGV = new llvm::GlobalVariable( + getModule(), + CmdStr->getType(), // [N x i8] + true, // constant + llvm::GlobalValue::InternalLinkage, + CmdStr, + VarName + ".data" +); +DataGV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::None); + +// Step 3: Pointer to string +llvm::Constant *PtrToStr = llvm::ConstantExpr::getPointerCast( + DataGV, llvm::PointerType::getUnqual(llvm::Type::getInt8Ty(getLLVMContext())) +); + + +// Step 4: Remove dummy external if exists +if (auto *Old = getModule().getNamedGlobal(VarName)) { + Old->eraseFromParent(); +} + +// ✅ Step 5: Emit the real global variable +auto *FinalGV = new llvm::GlobalVariable( + getModule(), + PtrToStr->getType(), // i8* + true, // constant + llvm::GlobalValue::ExternalLinkage, // important: this makes it visible! + PtrToStr, + VarName +); +//FinalGV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::None); + +llvm::errs() << "✅ Emitting " << VarName << " global variable!\n"; + +// === END === + } void CodeGenModule::EmitOpenCLMetadata() { `````````` </details> https://github.com/llvm/llvm-project/pull/144622 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
