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C-Breeze C Compiler Infrastructure [ Project home page] |
asm_gen_walker.h
Go to the documentation of this file.00001 // $Id: asm_gen_walker.h,v 1.8 2003/08/11 17:38:51 abrown Exp $ 00002 // ---------------------------------------------------------------------- 00003 // 00004 // C-Breeze 00005 // C Compiler Framework 00006 // 00007 // Copyright (c) 2002 University of Texas at Austin 00008 // 00009 // Paul Arthur Navratil 00010 // Charles Nevill 00011 // Calvin Lin 00012 // 00013 // Permission is hereby granted, free of charge, to any person 00014 // obtaining a copy of this software and associated documentation 00015 // files (the "Software"), to deal in the Software without 00016 // restriction, including without limitation the rights to use, copy, 00017 // modify, merge, publish, distribute, sublicense, and/or sell copies 00018 // of the Software, and to permit persons to whom the Software is 00019 // furnished to do so, subject to the following conditions: 00020 // 00021 // The above copyright notice and this permission notice shall be 00022 // included in all copies or substantial portions of the Software. 00023 // 00024 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00025 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00026 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00027 // NONINFRINGEMENT. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT 00028 // AUSTIN BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 00029 // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 00030 // OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00031 // THE SOFTWARE. 00032 // 00033 // We acknowledge the C-to-C Translator from MIT Laboratory for 00034 // Computer Science for inspiring parts of the C-Breeze design. 00035 // 00036 // ---------------------------------------------------------------------- 00037 00038 #ifndef ASM_GEN_WALKER_H 00039 #define ASM_GEN_WALKER_H 00040 00041 00042 #include "c_breeze.h" 00043 #include "instruction.h" 00044 00045 class asm_gen_walker : public Walker 00046 { 00047 friend class reg_alloc; 00048 00049 public: 00050 00051 // constructor 00052 asm_gen_walker(); 00053 00054 // destructor 00055 ~asm_gen_walker(); 00056 00057 00058 public: 00060 // walker interface 00061 00062 // what to do at a translation unit 00063 void at_unit( unitNode * the_unit, Order ord ); 00064 00065 // what to do at a procedure 00066 void at_proc( procNode * the_proc, Order ord ); 00067 00068 protected: 00070 // helpers 00071 00072 // emit an instruction to the output file 00073 void emit( const LirInst * inst ); 00074 void emit( const instruction_list & insts ); 00075 00076 // compute the total size of the stack frame 00077 void computeStackFrameSize(); 00078 00079 // inject code for saving/restoring callee-save registers 00080 void doCalleeSave(); 00081 00082 // inject code for saving/restoring caller-save registers 00083 void doCallerSave(); 00084 00085 // create a temporary for saving a register 00086 void createTempForRegSave( unsigned int id, Register & reg, 00087 typeNode *& vt, declNode *& tempDecl ); 00088 00089 00090 protected: 00092 // variables 00093 00094 // current translation unit 00095 unitNode * _unit; 00096 00097 // current procedure 00098 procNode * _proc; 00099 00100 // current output file 00101 FILE * _pOutFile; 00102 00103 }; 00104 00105 #endif /* ASM_GEN_WALKER_H */