BasicBlock 与 Function 中的源代码如下: // defined in include/llvm/IR/BasicBlock.hclassBasicBlockfinal:publicValue,// Basic blocks are data objects alsopublicilist_node_with_parent<BasicBlock,Function>{public:usingInstListType=SymbolTableList<Instruction>;private:InstListTypeInstList;...}// defined...
void storeRegToStackStack(MachineBasicBlock&MBB, MachineBasicBlock:: iterator MI, Register SrcReg, bool iskill, int FrameIndex, const TargetRegisterClass *RC, const TargetRegisterInfo *TRI, int64_t offset) const = 0; void loadRegFromStackSlot(MachineBasicBlock&MBB, MachineBasicBlock:: iterator ...
llvm的组成结构是Module-->Function-->BasicBlock-->instruction(指令),一个源文件要某方法弄清楚有多少个basicBlock,有几种方法: 1.将文件编译成.ll,cat test.ll查看文件内容,可以看出 2.写pass通过f->viewCFG();打印出f的CFG图,CFG图可以清楚的看出block块之间的链路流程...
打印出的是clang dump出的文本形式(LLVM IR的文本表示),包含一个Function(@test),这个Function包含一个BasicBlock(entry),BasicBlock中包含四条Instruction,Instruction在内存中的形式其是以链条的形式来存储。 如果不考虑优化、不关心变量之间的引用关系,Instruction 之间只用链表链起来问题也不大,想要生成目标平台汇编直...
llvm/examples/:包含LLVM官网中一些教程的代码实现。 llvm/include/:存放源码中的公共头文件 llvm/lib/(主要目录如下) llvm/lib/IR/:包含所有和IR层有关的源码文件,这些文件实现了很多核心的类(class),比如:Instruction类,BasicBlock类,Function类,Module类。
BasicBlock *bb = BasicBlock::Create(g_llvm_context, "entry", function); // 设置指令插入点,即后面的指令会被插入到 bb Builder.SetInsertPoint(bb); // Record the function arguments in the g_named_values map. // g_named_values 会被 VariableExprAST 访问 ...
Function*TheFunction=Builder.GetInsertBlock()->getParent();// Create blocks for the then and else cases. Insert the 'then' block at the// end of the function.BasicBlock*ThenBB=BasicBlock::Create(TheContext,"then",TheFunction);BasicBlock*ElseBB=BasicBlock::Create(TheContext,"else");BasicBlo...
The arr.Length load cannot be moved outside the loop, since the store inside the loop can alias it. There is a llvm.invariant.start/end intrinsic, but that seems to be only useful for marking a memory area as invariant inside a basic block, so it cannot be used to mark a load globa...
for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) if (Value *V = SimplifyInstruction(I)) I->replaceAllUsesWith(V); 1. 2. 3. This code simply loops over each instruction in a block, checking to see if any of them simplify. If so (because ...
BasicBlock *BB = BasicBlock::Create(TheContext, "entry", TheFunction); ... 基本上,在对代码进行代码化之前,如果它是用户定义的运算符,我们会在优先级表中注册它。这允许二元运算符解析我们已有的逻辑来处理它。由于我们正在研究一个完全通用的运算符优先级解析器,所以我们需要做的就是“扩展语法”。 现在...