3 Xinclude <llvm/CodeGen/InstrForest.h>
5 typedef InstrTreeNode* NODEPTR_TYPE;
6 Xdefine OP_LABEL(p) ((p)->opLabel)
7 Xdefine LEFT_CHILD(p) ((p)->LeftChild)
8 Xdefine RIGHT_CHILD(p) ((p)->RightChild)
9 Xdefine STATE_LABEL(p) ((p)->state)
12 // Get definitions for various instruction values that we will need...
13 #define HANDLE_TERM_INST(N, OPC, CLASS) Ydefine OPC##OPCODE N
14 #define HANDLE_UNARY_INST(N, OPC, CLASS) Ydefine OPC##OPCODE N
15 #define HANDLE_BINARY_INST(N, OPC, CLASS) Ydefine OPC##OPCODE N
16 #define HANDLE_MEMORY_INST(N, OPC, CLASS) Ydefine OPC##OPCODE N
17 #define HANDLE_OTHER_INST(N, OPC, CLASS) Ydefine OPC##OPCODE N
19 #include "llvm/Instruction.def"
25 %term Ret=RetOPCODE /* return void from a function */
26 %term RetValue=101 /* return a value from a function */
27 %term BrUncond=BrOPCODE
29 %term Switch=SwitchOPCODE
39 /* Use the next 4 to distinguish bitwise operators from
40 * logical operators. This is no longer used for Sparc,
41 * but may be useful for other target machines.
42 * The last one is the bitwise Not(val) == XOR val, 11..1.
43 * Note that it is also a binary operator, not unary.
49 /* The next one is the boolean Not(val) == bool XOR val, true
50 * Note that it is also a binary operator, not unary.
54 %term SetCC=114 /* use this to match all SetCC instructions */
61 %term Malloc=MallocOPCODE
63 %term Alloca=AllocaOPCODE
64 %term AllocaN=122 /* alloca with arg N */
66 %term Store=StoreOPCODE
67 %term GetElemPtr=GetElementPtrOPCODE
68 %term GetElemPtrIdx=125 /* getElemPtr with index vector */
70 %term Phi=PHINodeOPCODE
72 %term Cast=CastOPCODE /* cast that will be ignored. others are made explicit */
90 %term VaArg=VarArgOPCODE
91 /* 32...46 are unused */
93 * The foll. values should match the constants in InstrForest.h
99 /* 50+i is a variant of i, as defined above */
103 /*-----------------------------------------------------------------------*
104 * The productions of the grammar.
105 * Note that all chain rules are numbered 101 and above.
106 * Also, a special case of production X is numbered 100+X, 200+X, etc.
107 * The cost of a 1-cycle operation is represented as 10, to allow
108 * finer comparisons of costs (effectively, fractions of 1/10).
109 *-----------------------------------------------------------------------*/
112 * The top-level statements
115 stmt: RetValue(reg) = 2 (30);
116 stmt: Store(reg,reg) = 3 (10);
117 stmt: Store(reg,ptrreg) = 4 (10);
118 stmt: BrUncond = 5 (20);
119 stmt: BrCond(setCC) = 6 (20); /* branch on cond. code */
120 stmt: BrCond(setCCconst) = 206 (10); /* may save one instruction */
121 stmt: BrCond(reg) = 8 (20); /* may avoid an extra instr */
122 stmt: BrCond(Constant) = 208 (20); /* may avoid an extra instr */
123 stmt: Switch(reg) = 9 (30); /* cost = load + branch */
128 * List node used for nodes with more than 2 children
130 reg: VRegList(reg,reg) = 10 (0);
133 * Special case non-terminals to help combine unary instructions.
134 * Eg1: zdouble <- todouble(xfloat) * todouble(yfloat)
135 * Eg2: c <- a AND (NOT b).
136 * Note that the costs are counted for the special non-terminals here,
137 * and should not be counted again for the reg productions later.
139 not: Not(reg,reg) = 21 (10);
140 tobool: ToBoolTy(reg) = 22 (10);
141 toubyte: ToUByteTy(reg) = 23 (10);
142 tosbyte: ToSByteTy(reg) = 24 (10);
143 toushort: ToUShortTy(reg) = 25 (10);
144 toshort: ToShortTy(reg) = 26 (10);
145 touint: ToUIntTy(reg) = 27 (10);
146 toint: ToIntTy(reg) = 28 (10);
147 toulong: ToULongTy(reg) = 29 (10);
148 tolong: ToLongTy(reg) = 30 (10);
149 tofloat: ToFloatTy(reg) = 31 (10);
150 todouble: ToDoubleTy(reg) = 32 (10);
151 todoubleConst: ToDoubleTy(Constant) = 232 (10);
154 * All the ways to produce a boolean value (Not and ToBoolTy are above):
155 * -- boolean operators: Not, And, Or, ..., ToBoolTy, SetCC
156 * -- an existing boolean register not in the same tree
157 * -- a boolean constant
159 * For And, Or, Xor, we add special cases for when:
160 * (a) one operand is a constant.
161 * (b) one operand is a NOT, to use the ANDN, ORN, and XORN instrns.
162 * We do not need the cases when both operands are constant
163 * because constant folding should take care of that beforehand.
165 reg: And(reg,reg) = 38 (10);
166 reg: And(reg,not) = 138 (0); /* cost is counted for not */
167 reg: And(reg,Constant) = 238 (10);
168 reg: Or (reg,reg) = 39 (10);
169 reg: Or (reg,not) = 139 (0); /* cost is counted for not */
170 reg: Or (reg,Constant) = 239 (10);
171 reg: Xor(reg,reg) = 40 (10);
172 reg: Xor(reg,not) = 140 (0); /* cost is counted for not */
173 reg: Xor(reg,Constant) = 240 (10);
175 /* Special case non-terms for BrCond(setCC) and BrCond(setCCconst) */
176 setCCconst: SetCC(reg,Constant) = 41 (5);
177 setCC: SetCC(reg,reg) = 42 (10);
180 reg: tobool = 222 (0);
181 reg: setCCconst = 241 (0);
182 reg: setCC = 242 (0);
185 * Special case non-terminals for the unary cast operators.
186 * Some of these can be folded into other operations (e.g., todouble).
187 * The rest are just for uniformity.
189 reg: toubyte = 123 (0);
190 reg: tosbyte = 124 (0);
191 reg: toushort = 125 (0);
192 reg: toshort = 126 (0);
193 reg: touint = 127 (0);
194 reg: toint = 128 (0);
195 reg: toulong = 129 (0);
196 reg: tolong = 130 (0);
197 reg: tofloat = 131 (0);
198 reg: todouble = 132 (0);
199 reg: todoubleConst = 133 (0);
201 reg: ToArrayTy(reg) = 19 (10);
202 reg: ToPointerTy(reg) = 20 (10);
205 * The binary arithmetic operators.
207 reg: Add(reg,reg) = 33 (10);
208 reg: Sub(reg,reg) = 34 (10);
209 reg: Mul(reg,reg) = 35 (30);
210 reg: Mul(todouble,todouble) = 135 (20); /* avoids 1-2 type converts */
211 reg: Div(reg,reg) = 36 (60);
212 reg: Rem(reg,reg) = 37 (60);
215 * The binary bitwise logical operators.
217 reg: BAnd(reg,reg) = 338 (10);
218 reg: BAnd(reg,bnot) = 438 ( 0); /* cost is counted for not */
219 reg: BOr( reg,reg) = 339 (10);
220 reg: BOr( reg,bnot) = 439 ( 0); /* cost is counted for not */
221 reg: BXor(reg,reg) = 340 (10);
222 reg: BXor(reg,bnot) = 440 ( 0); /* cost is counted for not */
224 reg: bnot = 321 ( 0);
225 bnot: BNot(reg,reg) = 421 (10);
228 * Special cases for the binary operators with one constant argument.
229 * Not and BNot are effectively just one argument, so not needed here.
231 reg: Add(reg,Constant) = 233 (10);
232 reg: Sub(reg,Constant) = 234 (10);
233 reg: Mul(reg,Constant) = 235 (30);
234 reg: Mul(todouble,todoubleConst) = 335 (20); /* avoids 1-2 type converts */
235 reg: Div(reg,Constant) = 236 (60);
236 reg: Rem(reg,Constant) = 237 (60);
238 reg: BAnd(reg,Constant) = 538 (0);
239 reg: BOr( reg,Constant) = 539 (0);
240 reg: BXor(reg,Constant) = 540 (0);
243 * Memory access instructions
245 reg: Load(reg) = 51 (30);
246 reg: Load(ptrreg) = 52 (20); /* 1 counted for ptrreg */
247 reg: ptrreg = 155 (0);
248 ptrreg: GetElemPtr(reg) = 55 (10);
249 ptrreg: GetElemPtrIdx(reg,reg) = 56 (10);
250 reg: Alloca = 57 (10);
251 reg: AllocaN(reg) = 58 (10);
254 * Other operators producing register values
256 reg: Call = 61 (20); /* just ignore the operands! */
257 reg: Shl(reg,reg) = 62 (20); /* 1 for issue restrictions */
258 reg: Shr(reg,reg) = 63 (20); /* 1 for issue restrictions */
259 reg: Phi(reg,reg) = 64 (0);
260 reg: VaArg(reg) = 65 (40); /* load from stack then incr */
263 * Finally, leaf nodes of expression trees.
266 reg: Constant = 72 (3); /* prefer direct use */
271 /*-----------------------------------------------------------------------*
272 * The rest of this file provides code to print the cover produced
273 * by BURG and information about computed tree cost and matches.
274 * This code was taken from sample.gr provided with BURG.
275 *-----------------------------------------------------------------------*/
277 void printcover(NODEPTR_TYPE p, int goalnt, int indent) {
278 int eruleno = burm_rule(STATE_LABEL(p), goalnt);
279 short *nts = burm_nts[eruleno];
280 NODEPTR_TYPE kids[10];
284 printf("no cover\n");
287 for (i = 0; i < indent; i++)
289 printf("%s\n", burm_string[eruleno]);
290 burm_kids(p, eruleno, kids);
291 for (i = 0; nts[i]; i++)
292 printcover(kids[i], nts[i], indent+1);
295 void printtree(NODEPTR_TYPE p) {
296 int op = burm_op_label(p);
298 printf("%s", burm_opname[op]);
299 switch (burm_arity[op]) {
304 printtree(burm_child(p, 0));
309 printtree(burm_child(p, 0));
311 printtree(burm_child(p, 1));
317 int treecost(NODEPTR_TYPE p, int goalnt, int costindex) {
318 int eruleno = burm_rule(STATE_LABEL(p), goalnt);
319 int cost = burm_cost[eruleno][costindex], i;
320 short *nts = burm_nts[eruleno];
321 NODEPTR_TYPE kids[10];
323 burm_kids(p, eruleno, kids);
324 for (i = 0; nts[i]; i++)
325 cost += treecost(kids[i], nts[i], costindex);
329 void printMatches(NODEPTR_TYPE p) {
333 printf("Node 0x%lx= ", (unsigned long)p);
335 printf(" matched rules:\n");
336 for (nt = 1; burm_ntname[nt] != (char*)NULL; nt++)
337 if ((eruleno = burm_rule(STATE_LABEL(p), nt)) != 0)
338 printf("\t%s\n", burm_string[eruleno]);