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06cb8ed006
This was always part of the VMCore library out of necessity -- it deals entirely in the IR. The .cpp file in fact was already part of the VMCore library. This is just a mechanical move. I've tried to go through and re-apply the coding standard's preferred header sort, but at 40-ish files, I may have gotten some wrong. Please let me know if so. I'll be committing the corresponding updates to Clang and Polly, and Duncan has DragonEgg. Thanks to Bill and Eric for giving the green light for this bit of cleanup. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159421 91177308-0d34-0410-b5e6-96231b3b80d8
95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
//===-- BrainF.h - BrainF compiler class ----------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===--------------------------------------------------------------------===//
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//
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// This class stores the data for the BrainF compiler so it doesn't have
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// to pass all of it around. The main method is parse.
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//
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//===--------------------------------------------------------------------===//
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#ifndef BRAINF_H
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#define BRAINF_H
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#include "llvm/IRBuilder.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Module.h"
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using namespace llvm;
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/// This class provides a parser for the BrainF language.
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/// The class itself is made to store values during
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/// parsing so they don't have to be passed around
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/// as much.
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class BrainF {
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public:
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/// Options for how BrainF should compile
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enum CompileFlags {
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flag_off = 0,
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flag_arraybounds = 1
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};
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/// This is the main method. It parses BrainF from in1
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/// and returns the module with a function
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/// void brainf()
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/// containing the resulting code.
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/// On error, it calls abort.
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/// The caller must delete the returned module.
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Module *parse(std::istream *in1, int mem, CompileFlags cf,
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LLVMContext& C);
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protected:
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/// The different symbols in the BrainF language
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enum Symbol {
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SYM_NONE,
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SYM_READ,
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SYM_WRITE,
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SYM_MOVE,
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SYM_CHANGE,
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SYM_LOOP,
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SYM_ENDLOOP,
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SYM_EOF
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};
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/// Names of the different parts of the language.
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/// Tape is used for reading and writing the tape.
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/// headreg is used for the position of the head.
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/// label is used for the labels for the BasicBlocks.
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/// testreg is used for testing the loop exit condition.
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static const char *tapereg;
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static const char *headreg;
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static const char *label;
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static const char *testreg;
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/// Put the brainf function preamble and other fixed pieces of code
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void header(LLVMContext& C);
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/// The main loop for parsing. It calls itself recursively
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/// to handle the depth of nesting of "[]".
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void readloop(PHINode *phi, BasicBlock *oldbb,
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BasicBlock *testbb, LLVMContext &Context);
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/// Constants during parsing
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int memtotal;
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CompileFlags comflag;
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std::istream *in;
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Module *module;
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Function *brainf_func;
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Function *getchar_func;
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Function *putchar_func;
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Value *ptr_arr;
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Value *ptr_arrmax;
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BasicBlock *endbb;
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BasicBlock *aberrorbb;
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/// Variables
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IRBuilder<> *builder;
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Value *curhead;
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};
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#endif
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