1 /* -*- mode: c; tab-width: 4; c-basic-offset: 4 -*- */
2 /***************************** ncomp/ncomp.c ***********************************
4 Copyright (c) 1997 A. Krall, R. Grafl, M. Gschwind, M. Probst
6 See file COPYRIGHT for information on usage and disclaimer of warranties.
8 Contains the functions which translates a JavaVM method into native code.
9 This is the new version of the compiler which is a lot faster and has new
10 exception handling schemes. The main function is new_comp.
12 Authors: Andreas Krall EMAIL: cacao@complang.tuwien.ac.at
13 Reinhard Grafl EMAIL: cacao@complang.tuwien.ac.at
15 Last Change: 1997/11/05
17 *******************************************************************************/
21 #include "ncomp/ncomp.h"
29 #include "threads/thread.h"
32 /*************************** global switches **********************************/
34 bool compileverbose = false;
35 bool showstack = false;
36 bool showdisassemble = false;
37 bool showddatasegment = false;
38 bool showintermediate = false;
39 int optimizelevel = 0;
41 bool checkbounds = true;
42 bool checknull = true;
43 bool checkfloats = true;
44 bool checksync = true;
46 bool getcompilingtime = false;
47 long compilingtime = 0;
49 int has_ext_instr_set = 0;
51 bool statistics = false;
53 int count_jit_calls = 0;
54 int count_methods = 0;
56 int count_pcmd_activ = 0;
57 int count_pcmd_drop = 0;
58 int count_pcmd_zero = 0;
59 int count_pcmd_const_store = 0;
60 int count_pcmd_const_alu = 0;
61 int count_pcmd_const_bra = 0;
62 int count_pcmd_load = 0;
63 int count_pcmd_move = 0;
64 int count_load_instruction = 0;
65 int count_pcmd_store = 0;
66 int count_pcmd_store_comb = 0;
67 int count_dup_instruction = 0;
68 int count_pcmd_op = 0;
69 int count_pcmd_mem = 0;
70 int count_pcmd_met = 0;
71 int count_pcmd_bra = 0;
72 int count_pcmd_table = 0;
73 int count_pcmd_return = 0;
74 int count_pcmd_returnx = 0;
75 int count_check_null = 0;
76 int count_check_bound = 0;
77 int count_max_basic_blocks = 0;
78 int count_basic_blocks = 0;
79 int count_javainstr = 0;
80 int count_max_javainstr = 0;
81 int count_javacodesize = 0;
82 int count_javaexcsize = 0;
84 int count_tryblocks = 0;
85 int count_code_len = 0;
86 int count_data_len = 0;
87 int count_cstub_len = 0;
88 int count_nstub_len = 0;
89 int count_max_new_stack = 0;
90 int count_upper_bound_new_stack = 0;
91 static int count_block_stack_init[11] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
92 int *count_block_stack = count_block_stack_init;
93 static int count_analyse_iterations_init[5] = {0, 0, 0, 0, 0};
94 int *count_analyse_iterations = count_analyse_iterations_init;
95 static int count_method_bb_distribution_init[9] = {0, 0, 0, 0, 0, 0, 0, 0, 0};
96 int *count_method_bb_distribution = count_method_bb_distribution_init;
97 static int count_block_size_distribution_init[18] = {0, 0, 0, 0, 0,
98 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
99 int *count_block_size_distribution = count_block_size_distribution_init;
100 static int count_store_length_init[21] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
101 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
102 int *count_store_length = count_store_length_init;
103 static int count_store_depth_init[11] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
104 int *count_store_depth = count_store_depth_init;
107 /*********************** include compiler data types **************************/
109 #include "ncomp/ncompdef.h"
112 /*********************** global compiler variables ****************************/
114 /* data about the currently compiled method */
116 static classinfo *class; /* class the compiled method belongs to */
117 static methodinfo *method; /* pointer to method info of compiled method */
118 static unicode *descriptor; /* type descriptor of compiled method */
119 static u2 mparamcount; /* number of parameters (incl. this) */
120 static u1 *mparamtypes; /* types of all parameters (TYPE_INT, ...) */
121 static u2 mreturntype; /* return type of method */
123 static int maxstack; /* maximal JavaVM stack size */
124 static int maxlocals; /* maximal number of local JavaVM variables */
125 static int jcodelength; /* length of JavaVM-codes */
126 static u1 *jcode; /* pointer to start of JavaVM-code */
127 static int exceptiontablelength;/* length of exception table */
128 static exceptiontable *extable; /* pointer to start of exception table */
130 static int block_count; /* number of basic blocks */
131 static basicblock *block; /* points to basic block array */
132 static int *block_index; /* a table which contains for every byte of */
133 /* JavaVM code a basic block index if at this */
134 /* byte there is the start of a basic block */
136 static int instr_count; /* number of JavaVM instructions */
137 static instruction *instr; /* points to intermediate code instructions */
139 static int stack_count; /* number of stack elements */
140 static stackelement *stack; /* points to intermediate code instructions */
142 static bool isleafmethod; /* true if a method doesn't call subroutines */
144 /* list of all classes used by the compiled method which have to be */
145 /* initialised (if not already done) before execution of this method */
147 static chain *uninitializedclasses;
150 /******************** include compiler subsystems *****************************/
152 #include "sysdep/ngen.h" /* code generator header file */
153 #include "ncomp/ntools.c" /* compiler tool functions */
154 #include "ncomp/mcode.c" /* code generation tool functions */
155 #include "sysdep/disass.c" /* disassembler (for debug purposes only) */
156 #include "ncomp/nparse.c" /* parsing of JavaVM code */
157 #include "ncomp/nreg.c" /* register allocation and support routines */
158 #include "ncomp/nstack.c" /* analysing the stack operations */
159 #include "sysdep/ngen.c" /* code generator */
164 /* dummy function, used when there is no JavaVM code available */
166 static void* do_nothing_function()
172 /*******************************************************************************
174 new_compile, new version of compiler, translates one method to machine code
176 *******************************************************************************/
178 methodptr new_compile(methodinfo *m)
184 /* if method has been already compiled return immediately */
189 return m->entrypoint;
193 intsDisable(); /* disable interrupts */
196 /* mark start of dump memory area */
198 dumpsize = dump_size ();
202 if (getcompilingtime)
203 starttime = getcputime();
205 /* if there is no javacode print error message and return empty method */
208 sprintf(logtext, "No code given for: ");
209 unicode_sprint(logtext+strlen(logtext), m->class->name);
210 strcpy(logtext+strlen(logtext), ".");
211 unicode_sprint(logtext+strlen(logtext), m->name);
212 unicode_sprint(logtext+strlen(logtext), m->descriptor);
214 intsRestore(); /* enable interrupts again */
215 return (methodptr) do_nothing_function; /* return empty method */
218 /* print log message for compiled method */
220 if (compileverbose) {
221 sprintf(logtext, "Compiling: ");
222 unicode_sprint(logtext+strlen(logtext), m->class->name);
223 strcpy(logtext+strlen(logtext), ".");
224 unicode_sprint(logtext+strlen(logtext), m->name);
225 unicode_sprint(logtext+strlen(logtext), m->descriptor);
230 /* initialisation of variables and subsystems */
236 descriptor = m->descriptor;
237 maxstack = m->maxstack;
238 maxlocals = m->maxlocals;
239 jcodelength = m->jcodelength;
241 exceptiontablelength = m->exceptiontablelength;
242 extable = m->exceptiontable;
245 count_tryblocks += exceptiontablelength;
246 count_javacodesize += jcodelength + 18;
247 count_javaexcsize += exceptiontablelength * 8;
250 /* initialise parameter type descriptor */
252 descriptor2types (m);
253 mreturntype = m->returntype;
254 mparamcount = m->paramcount;
255 mparamtypes = m->paramtypes;
257 /* initialize class list with class the compiled method belongs to */
259 uninitializedclasses = chain_new();
260 compiler_addinitclass (m->class);
263 /********************** call the compiler passes **************************/
276 interface_regalloc();
278 allocate_scratch_registers();
285 /*********** Zwischendarstellungen auf Wunsch ausgeben **********/
287 if (showintermediate)
289 else if (showdisassemble)
290 disassemble((void*) (m->mcode + dseglen), m->mcodelength - dseglen);
292 if (showddatasegment)
293 dseg_display((void*) (m->mcode));
297 /* release dump area */
299 dump_release (dumpsize);
303 if (getcompilingtime) {
304 stoptime = getcputime();
305 compilingtime += (stoptime-starttime);
308 /* initialize all used classes */
309 /* because of reentrant code global variables are not allowed here */
312 chain *ul = uninitializedclasses; /* list of uninitialized classes */
313 classinfo *c; /* single class */
315 while ((c = chain_first(ul)) != NULL) {
317 class_init (c); /* may again call the compiler */
322 intsRestore(); /* enable interrupts again */
324 /* return pointer to the methods entry point */
326 return m -> entrypoint;
330 /************ functions for compiler initialisation and finalisation **********/
336 has_ext_instr_set = ! has_no_x_instr_set();
338 for (i = 0; i < 256; i++)
341 stackreq[JAVA_NOP] = 0;
342 stackreq[JAVA_ISTORE] = 0;
343 stackreq[JAVA_LSTORE] = 0;
344 stackreq[JAVA_FSTORE] = 0;
345 stackreq[JAVA_DSTORE] = 0;
346 stackreq[JAVA_ASTORE] = 0;
347 stackreq[JAVA_ISTORE_0] = 0;
348 stackreq[JAVA_ISTORE_1] = 0;
349 stackreq[JAVA_ISTORE_2] = 0;
350 stackreq[JAVA_ISTORE_3] = 0;
351 stackreq[JAVA_LSTORE_0] = 0;
352 stackreq[JAVA_LSTORE_1] = 0;
353 stackreq[JAVA_LSTORE_2] = 0;
354 stackreq[JAVA_LSTORE_3] = 0;
355 stackreq[JAVA_FSTORE_0] = 0;
356 stackreq[JAVA_FSTORE_1] = 0;
357 stackreq[JAVA_FSTORE_2] = 0;
358 stackreq[JAVA_FSTORE_3] = 0;
359 stackreq[JAVA_DSTORE_0] = 0;
360 stackreq[JAVA_DSTORE_1] = 0;
361 stackreq[JAVA_DSTORE_2] = 0;
362 stackreq[JAVA_DSTORE_3] = 0;
363 stackreq[JAVA_ASTORE_0] = 0;
364 stackreq[JAVA_ASTORE_1] = 0;
365 stackreq[JAVA_ASTORE_2] = 0;
366 stackreq[JAVA_ASTORE_3] = 0;
367 stackreq[JAVA_IASTORE] = 0;
368 stackreq[JAVA_LASTORE] = 0;
369 stackreq[JAVA_FASTORE] = 0;
370 stackreq[JAVA_DASTORE] = 0;
371 stackreq[JAVA_AASTORE] = 0;
372 stackreq[JAVA_BASTORE] = 0;
373 stackreq[JAVA_CASTORE] = 0;
374 stackreq[JAVA_SASTORE] = 0;
375 stackreq[JAVA_POP] = 0;
376 stackreq[JAVA_POP2] = 0;
377 stackreq[JAVA_IINC] = 0;
378 stackreq[JAVA_IFEQ] = 0;
379 stackreq[JAVA_IFNE] = 0;
380 stackreq[JAVA_IFLT] = 0;
381 stackreq[JAVA_IFGE] = 0;
382 stackreq[JAVA_IFGT] = 0;
383 stackreq[JAVA_IFLE] = 0;
384 stackreq[JAVA_IF_ICMPEQ] = 0;
385 stackreq[JAVA_IF_ICMPNE] = 0;
386 stackreq[JAVA_IF_ICMPLT] = 0;
387 stackreq[JAVA_IF_ICMPGE] = 0;
388 stackreq[JAVA_IF_ICMPGT] = 0;
389 stackreq[JAVA_IF_ICMPLE] = 0;
390 stackreq[JAVA_IF_ACMPEQ] = 0;
391 stackreq[JAVA_IF_ACMPNE] = 0;
392 stackreq[JAVA_GOTO] = 0;
393 stackreq[JAVA_RET] = 0;
394 stackreq[JAVA_TABLESWITCH] = 0;
395 stackreq[ICMD_LOOKUPSWITCH] = 0;
396 stackreq[JAVA_IRETURN] = 0;
397 stackreq[JAVA_LRETURN] = 0;
398 stackreq[JAVA_FRETURN] = 0;
399 stackreq[JAVA_DRETURN] = 0;
400 stackreq[JAVA_ARETURN] = 0;
401 stackreq[JAVA_RETURN] = 0;
402 stackreq[JAVA_PUTSTATIC] = 0;
403 stackreq[JAVA_PUTFIELD] = 0;
404 stackreq[JAVA_MONITORENTER] = 0;
405 stackreq[ICMD_MONITOREXIT] = 0;
406 stackreq[JAVA_WIDE] = 0;
407 stackreq[JAVA_IFNULL] = 0;
408 stackreq[JAVA_IFNONNULL] = 0;
409 stackreq[JAVA_GOTO_W] = 0;
410 stackreq[JAVA_BREAKPOINT] = 0;
412 stackreq[JAVA_SWAP] = 2;
413 stackreq[JAVA_DUP2] = 2;
414 stackreq[JAVA_DUP_X1] = 3;
415 stackreq[JAVA_DUP_X2] = 4;
416 stackreq[JAVA_DUP2_X1] = 3;
417 stackreq[JAVA_DUP2_X2] = 4;
419 for (i = 0; i < 256; i++) stdopdescriptors[i] = NULL;
421 for (i = 0; i < sizeof(stdopdescriptortable)/sizeof(stdopdescriptor); i++) {
423 if (stdopdescriptortable[i].isfloat && checkfloats) {
424 stdopdescriptortable[i].supported = false;
427 stdopdescriptors[stdopdescriptortable[i].opcode] =
428 &(stdopdescriptortable[i]);