forked from OSchip/llvm-project
338 lines
10 KiB
C++
338 lines
10 KiB
C++
%{ // -*- C++ -*-
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Xinclude <stdio.h>
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Xinclude <llvm/CodeGen/InstrForest.h>
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typedef InstrTreeNode* NODEPTR_TYPE;
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Xdefine OP_LABEL(p) ((p)->opLabel)
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Xdefine LEFT_CHILD(p) ((p)->LeftChild)
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Xdefine RIGHT_CHILD(p) ((p)->RightChild)
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Xdefine STATE_LABEL(p) ((p)->state)
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Xdefine PANIC printf
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// Get definitions for various instruction values that we will need...
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#define HANDLE_TERM_INST(N, OPC, CLASS) Ydefine OPC##OPCODE N
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#define HANDLE_UNARY_INST(N, OPC, CLASS) Ydefine OPC##OPCODE N
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#define HANDLE_BINARY_INST(N, OPC, CLASS) Ydefine OPC##OPCODE N
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#define HANDLE_MEMORY_INST(N, OPC, CLASS) Ydefine OPC##OPCODE N
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#define HANDLE_OTHER_INST(N, OPC, CLASS) Ydefine OPC##OPCODE N
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#include "llvm/Instruction.def"
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%}
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%start stmt
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%term Ret=RetOPCODE /* return void from a function */
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%term RetValue=101 /* return a value from a function */
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%term BrUncond=BrOPCODE
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%term BrCond=102
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%term Switch=SwitchOPCODE
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/* 4 is unused */
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%term Add=AddOPCODE
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%term Sub=SubOPCODE
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%term Mul=MulOPCODE
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%term Div=DivOPCODE
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%term Rem=RemOPCODE
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%term And=AndOPCODE
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%term Or=OrOPCODE
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%term Xor=XorOPCODE
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/* Use the next 4 to distinguish bitwise operators from
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* logical operators. This is no longer used for Sparc,
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* but may be useful for other target machines.
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* The last one is the bitwise Not(val) == XOR val, 11..1.
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* Note that it is also a binary operator, not unary.
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*/
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%term BAnd=111
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%term BOr=112
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%term BXor=113
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%term BNot=213
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/* The next one is the boolean Not(val) == bool XOR val, true
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* Note that it is also a binary operator, not unary.
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*/
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%term Not=313
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%term SetCC=114 /* use this to match all SetCC instructions */
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/* %term SetEQ=13 */
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/* %term SetNE=14 */
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/* %term SetLE=15 */
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/* %term SetGE=16 */
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/* %term SetLT=17 */
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/* %term SetGT=18 */
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%term Malloc=MallocOPCODE
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%term Free=FreeOPCODE
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%term Alloca=AllocaOPCODE
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%term AllocaN=122 /* alloca with arg N */
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%term Load=LoadOPCODE
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%term Store=StoreOPCODE
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%term GetElemPtr=GetElementPtrOPCODE
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%term GetElemPtrIdx=125 /* getElemPtr with index vector */
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%term Phi=PHINodeOPCODE
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%term Cast=CastOPCODE /* cast that will be ignored. others are made explicit */
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%term ToBoolTy=127
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%term ToUByteTy=128
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%term ToSByteTy=129
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%term ToUShortTy=130
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%term ToShortTy=131
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%term ToUIntTy=132
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%term ToIntTy=133
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%term ToULongTy=134
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%term ToLongTy=135
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%term ToFloatTy=136
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%term ToDoubleTy=137
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%term ToArrayTy=138
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%term ToPointerTy=139
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%term Call=CallOPCODE
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%term Shl=ShlOPCODE
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%term Shr=ShrOPCODE
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/* 30...46 are unused */
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/*
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* The foll. values should match the constants in InstrForest.h
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*/
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%term VRegList=97
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%term VReg=98
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%term Constant=99
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%term Label=100
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/* 50+i is a variant of i, as defined above */
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%%
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/*-----------------------------------------------------------------------*
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* The productions of the grammar.
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* Note that all chain rules are numbered 101 and above.
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* Also, a special case of production X is numbered 100+X, 200+X, etc.
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* The cost of a 1-cycle operation is represented as 10, to allow
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* finer comparisons of costs (effectively, fractions of 1/10).
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*-----------------------------------------------------------------------*/
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/*
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* The top-level statements
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*/
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stmt: Ret = 1 (30);
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stmt: RetValue(reg) = 2 (30);
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stmt: Store(reg,reg) = 3 (10);
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stmt: Store(reg,ptrreg) = 4 (10);
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stmt: BrUncond = 5 (20);
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stmt: BrCond(setCC) = 6 (20); /* branch on cond. code */
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stmt: BrCond(setCCconst) = 206 (10); /* may save one instruction */
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stmt: BrCond(reg) = 8 (20); /* may avoid an extra instr */
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stmt: BrCond(Constant) = 208 (20); /* may avoid an extra instr */
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stmt: Switch(reg) = 9 (30); /* cost = load + branch */
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stmt: reg = 111 (0);
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/*
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* List node used for nodes with more than 2 children
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*/
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reg: VRegList(reg,reg) = 10 (0);
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/*
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* Special case non-terminals to help combine unary instructions.
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* Eg1: zdouble <- todouble(xfloat) * todouble(yfloat)
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* Eg2: c <- a AND (NOT b).
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* Note that the costs are counted for the special non-terminals here,
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* and should not be counted again for the reg productions later.
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*/
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not: Not(reg,reg) = 21 (10);
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tobool: ToBoolTy(reg) = 22 (10);
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toubyte: ToUByteTy(reg) = 23 (10);
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tosbyte: ToSByteTy(reg) = 24 (10);
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toushort: ToUShortTy(reg) = 25 (10);
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toshort: ToShortTy(reg) = 26 (10);
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touint: ToUIntTy(reg) = 27 (10);
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toint: ToIntTy(reg) = 28 (10);
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toulong: ToULongTy(reg) = 29 (10);
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tolong: ToLongTy(reg) = 30 (10);
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tofloat: ToFloatTy(reg) = 31 (10);
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todouble: ToDoubleTy(reg) = 32 (10);
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todoubleConst: ToDoubleTy(Constant) = 232 (10);
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/*
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* All the ways to produce a boolean value (Not and ToBoolTy are above):
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* -- boolean operators: Not, And, Or, ..., ToBoolTy, SetCC
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* -- an existing boolean register not in the same tree
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* -- a boolean constant
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*
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* For And, Or, Xor, we add special cases for when:
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* (a) one operand is a constant.
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* (b) one operand is a NOT, to use the ANDN, ORN, and XORN instrns.
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* We do not need the cases when both operands are constant
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* because constant folding should take care of that beforehand.
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*/
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reg: And(reg,reg) = 38 (10);
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reg: And(reg,not) = 138 (0); /* cost is counted for not */
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reg: And(reg,Constant) = 238 (10);
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reg: Or (reg,reg) = 39 (10);
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reg: Or (reg,not) = 139 (0); /* cost is counted for not */
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reg: Or (reg,Constant) = 239 (10);
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reg: Xor(reg,reg) = 40 (10);
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reg: Xor(reg,not) = 140 (0); /* cost is counted for not */
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reg: Xor(reg,Constant) = 240 (10);
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/* Special case non-terms for BrCond(setCC) and BrCond(setCCconst) */
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setCCconst: SetCC(reg,Constant) = 41 (5);
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setCC: SetCC(reg,reg) = 42 (10);
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reg: not = 221 (0);
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reg: tobool = 222 (0);
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reg: setCCconst = 241 (0);
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reg: setCC = 242 (0);
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/*
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* Special case non-terminals for the unary cast operators.
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* Some of these can be folded into other operations (e.g., todouble).
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* The rest are just for uniformity.
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*/
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reg: toubyte = 123 (0);
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reg: tosbyte = 124 (0);
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reg: toushort = 125 (0);
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reg: toshort = 126 (0);
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reg: touint = 127 (0);
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reg: toint = 128 (0);
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reg: toulong = 129 (0);
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reg: tolong = 130 (0);
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reg: tofloat = 131 (0);
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reg: todouble = 132 (0);
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reg: todoubleConst = 133 (0);
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reg: ToArrayTy(reg) = 19 (10);
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reg: ToPointerTy(reg) = 20 (10);
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/*
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* The binary arithmetic operators.
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*/
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reg: Add(reg,reg) = 33 (10);
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reg: Sub(reg,reg) = 34 (10);
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reg: Mul(reg,reg) = 35 (30);
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reg: Mul(todouble,todouble) = 135 (20); /* avoids 1-2 type converts */
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reg: Div(reg,reg) = 36 (60);
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reg: Rem(reg,reg) = 37 (60);
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/*
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* The binary bitwise logical operators.
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*/
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reg: BAnd(reg,reg) = 338 (10);
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reg: BAnd(reg,bnot) = 438 ( 0); /* cost is counted for not */
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reg: BOr( reg,reg) = 339 (10);
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reg: BOr( reg,bnot) = 439 ( 0); /* cost is counted for not */
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reg: BXor(reg,reg) = 340 (10);
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reg: BXor(reg,bnot) = 440 ( 0); /* cost is counted for not */
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reg: bnot = 321 ( 0);
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bnot: BNot(reg,reg) = 421 (10);
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/*
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* Special cases for the binary operators with one constant argument.
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* Not and BNot are effectively just one argument, so not needed here.
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*/
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reg: Add(reg,Constant) = 233 (10);
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reg: Sub(reg,Constant) = 234 (10);
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reg: Mul(reg,Constant) = 235 (30);
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reg: Mul(todouble,todoubleConst) = 335 (20); /* avoids 1-2 type converts */
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reg: Div(reg,Constant) = 236 (60);
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reg: Rem(reg,Constant) = 237 (60);
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reg: BAnd(reg,Constant) = 538 (0);
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reg: BOr( reg,Constant) = 539 (0);
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reg: BXor(reg,Constant) = 540 (0);
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/*
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* Memory access instructions
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*/
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reg: Load(reg) = 51 (30);
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reg: Load(ptrreg) = 52 (20); /* 1 counted for ptrreg */
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reg: ptrreg = 155 (0);
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ptrreg: GetElemPtr(reg) = 55 (10);
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ptrreg: GetElemPtrIdx(reg,reg) = 56 (10);
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reg: Alloca = 57 (10);
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reg: AllocaN(reg) = 58 (10);
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/*
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* Other operators producing register values
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*/
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reg: Call = 61 (20); /* just ignore the operands! */
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reg: Shl(reg,reg) = 62 (20); /* 1 for issue restrictions */
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reg: Shr(reg,reg) = 63 (20); /* 1 for issue restrictions */
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reg: Phi(reg,reg) = 64 (0);
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/*
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* Finally, leaf nodes of expression trees.
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*/
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reg: VReg = 71 (0);
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reg: Constant = 72 (3); /* prefer direct use */
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%%
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/*-----------------------------------------------------------------------*
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* The rest of this file provides code to print the cover produced
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* by BURG and information about computed tree cost and matches.
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* This code was taken from sample.gr provided with BURG.
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*-----------------------------------------------------------------------*/
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void printcover(NODEPTR_TYPE p, int goalnt, int indent) {
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int eruleno = burm_rule(STATE_LABEL(p), goalnt);
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short *nts = burm_nts[eruleno];
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NODEPTR_TYPE kids[10];
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int i;
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if (eruleno == 0) {
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printf("no cover\n");
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return;
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}
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for (i = 0; i < indent; i++)
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printf(".");
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printf("%s\n", burm_string[eruleno]);
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burm_kids(p, eruleno, kids);
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for (i = 0; nts[i]; i++)
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printcover(kids[i], nts[i], indent+1);
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}
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void printtree(NODEPTR_TYPE p) {
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int op = burm_op_label(p);
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printf("%s", burm_opname[op]);
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switch (burm_arity[op]) {
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case 0:
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break;
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case 1:
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printf("(");
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printtree(burm_child(p, 0));
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printf(")");
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break;
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case 2:
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printf("(");
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printtree(burm_child(p, 0));
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printf(", ");
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printtree(burm_child(p, 1));
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printf(")");
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break;
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}
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}
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int treecost(NODEPTR_TYPE p, int goalnt, int costindex) {
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int eruleno = burm_rule(STATE_LABEL(p), goalnt);
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int cost = burm_cost[eruleno][costindex], i;
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short *nts = burm_nts[eruleno];
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NODEPTR_TYPE kids[10];
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burm_kids(p, eruleno, kids);
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for (i = 0; nts[i]; i++)
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cost += treecost(kids[i], nts[i], costindex);
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return cost;
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}
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void printMatches(NODEPTR_TYPE p) {
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int nt;
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int eruleno;
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printf("Node 0x%lx= ", (unsigned long)p);
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printtree(p);
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printf(" matched rules:\n");
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for (nt = 1; burm_ntname[nt] != (char*)NULL; nt++)
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if ((eruleno = burm_rule(STATE_LABEL(p), nt)) != 0)
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printf("\t%s\n", burm_string[eruleno]);
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}
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