1 /**
2  * \file
3  * IR Creation/Emission Macros
4  *
5  * Author:
6  *   Zoltan Varga (vargaz@gmail.com)
7  *
8  * (C) 2002 Ximian, Inc.
9  */
10 
11 #ifndef __MONO_IR_EMIT_H__
12 #define __MONO_IR_EMIT_H__
13 
14 #include "mini.h"
15 
16 G_BEGIN_DECLS
17 
18 static inline guint32
alloc_ireg(MonoCompile * cfg)19 alloc_ireg (MonoCompile *cfg)
20 {
21 	return cfg->next_vreg ++;
22 }
23 
24 static inline guint32
alloc_preg(MonoCompile * cfg)25 alloc_preg (MonoCompile *cfg)
26 {
27 	return alloc_ireg (cfg);
28 }
29 
30 static inline guint32
alloc_lreg(MonoCompile * cfg)31 alloc_lreg (MonoCompile *cfg)
32 {
33 #if SIZEOF_REGISTER == 8
34 	return cfg->next_vreg ++;
35 #else
36 	/* Use a pair of consecutive vregs */
37 	guint32 res = cfg->next_vreg;
38 
39 	cfg->next_vreg += 3;
40 
41 	return res;
42 #endif
43 }
44 
45 static inline guint32
alloc_freg(MonoCompile * cfg)46 alloc_freg (MonoCompile *cfg)
47 {
48 	if (mono_arch_is_soft_float ()) {
49 		/* Allocate an lvreg so float ops can be decomposed into long ops */
50 		return alloc_lreg (cfg);
51 	} else {
52 		/* Allocate these from the same pool as the int regs */
53 		return cfg->next_vreg ++;
54 	}
55 }
56 
57 static inline guint32
alloc_ireg_ref(MonoCompile * cfg)58 alloc_ireg_ref (MonoCompile *cfg)
59 {
60 	int vreg = alloc_ireg (cfg);
61 
62 	if (cfg->compute_gc_maps)
63 		mono_mark_vreg_as_ref (cfg, vreg);
64 
65 	return vreg;
66 }
67 
68 static inline guint32
alloc_ireg_mp(MonoCompile * cfg)69 alloc_ireg_mp (MonoCompile *cfg)
70 {
71 	int vreg = alloc_ireg (cfg);
72 
73 	if (cfg->compute_gc_maps)
74 		mono_mark_vreg_as_mp (cfg, vreg);
75 
76 	return vreg;
77 }
78 
79 static inline guint32
alloc_xreg(MonoCompile * cfg)80 alloc_xreg (MonoCompile *cfg)
81 {
82 	return alloc_ireg (cfg);
83 }
84 
85 static inline guint32
alloc_dreg(MonoCompile * cfg,MonoStackType stack_type)86 alloc_dreg (MonoCompile *cfg, MonoStackType stack_type)
87 {
88 	switch (stack_type) {
89 	case STACK_I4:
90 	case STACK_PTR:
91 		return alloc_ireg (cfg);
92 	case STACK_MP:
93 		return alloc_ireg_mp (cfg);
94 	case STACK_OBJ:
95 		return alloc_ireg_ref (cfg);
96 	case STACK_R4:
97 	case STACK_R8:
98 		return alloc_freg (cfg);
99 	case STACK_I8:
100 		return alloc_lreg (cfg);
101 	case STACK_VTYPE:
102 		return alloc_ireg (cfg);
103 	default:
104 		g_warning ("Unknown stack type %x\n", stack_type);
105 		g_assert_not_reached ();
106 		return -1;
107 	}
108 }
109 
110 /*
111  * Macros used to generate intermediate representation macros
112  *
113  * The macros use a `MonoConfig` object as its context, and among other
114  * things it is used to associate instructions with the memory pool with
115  * it.
116  *
117  * The macros come in three variations with slightly different
118  * features, the patter is: NEW_OP, EMIT_NEW_OP, MONO_EMIT_NEW_OP,
119  * the differences are as follows:
120  *
121  * `NEW_OP`: these are the basic macros to setup an instruction that is
122  * passed as an argument.
123  *
124  * `EMIT_NEW_OP`: these macros in addition to creating the instruction
125  * add the instruction to the current basic block in the `MonoConfig`
126  * object passed.   Usually these are used when further customization of
127  * the `inst` parameter is desired before the instruction is added to the
128  * MonoConfig current basic block.
129  *
130  * `MONO_EMIT_NEW_OP`: These variations of the instructions are used when
131  * you are merely interested in emitting the instruction into the `MonoConfig`
132  * parameter.
133  */
134 #undef MONO_INST_NEW
135 /*
136  * FIXME: zeroing out some fields is not needed with the new IR, but the old
137  * JIT code still uses the left and right fields, so it has to stay.
138  */
139 
140 /*
141  * MONO_INST_NEW: create a new MonoInst instance that is allocated on the MonoConfig pool.
142  *
143  * @cfg: the MonoConfig object that will be used as the context for the
144  * instruction.
145  * @dest: this is the place where the instance of the `MonoInst` is stored.
146  * @op: the value that should be stored in the MonoInst.opcode field
147  *
148  * This initializes an empty MonoInst that has been nulled out, it is allocated
149  * from the memory pool associated with the MonoConfig, but it is not linked anywhere.
150  * the cil_code is set to the cfg->ip address.
151  */
152 #define MONO_INST_NEW(cfg,dest,op) do {	\
153 		(dest) = (MonoInst *)mono_mempool_alloc ((cfg)->mempool, sizeof (MonoInst));	\
154 		(dest)->inst_c0 = (dest)->inst_c1 = 0; \
155 		(dest)->next = (dest)->prev = NULL;    \
156 		(dest)->opcode = (op);	\
157         (dest)->flags = 0; \
158         (dest)->type = 0; \
159         (dest)->dreg = -1;  \
160 	MONO_INST_NULLIFY_SREGS ((dest));		    \
161         (dest)->cil_code = (cfg)->ip;  \
162 	} while (0)
163 
164 /*
165  * Variants which take a dest argument and don't do an emit
166  */
167 #define NEW_ICONST(cfg,dest,val) do {	\
168         MONO_INST_NEW ((cfg), (dest), OP_ICONST); \
169 		(dest)->inst_c0 = (val);	\
170 		(dest)->type = STACK_I4;	\
171 		(dest)->dreg = alloc_dreg ((cfg), STACK_I4);	\
172 	} while (0)
173 
174 /*
175  * Avoid using this with a non-NULL val if possible as it is not AOT
176  * compatible. Use one of the NEW_xxxCONST variants instead.
177  */
178 #define NEW_PCONST(cfg,dest,val) do {	\
179         MONO_INST_NEW ((cfg), (dest), OP_PCONST); \
180 		(dest)->inst_p0 = (val);	\
181 		(dest)->type = STACK_PTR;	\
182 		(dest)->dreg = alloc_dreg ((cfg), STACK_PTR);	\
183 	} while (0)
184 
185 #define NEW_I8CONST(cfg,dest,val) do {  \
186         MONO_INST_NEW ((cfg), (dest), OP_I8CONST); \
187         (dest)->dreg = alloc_lreg ((cfg)); \
188         (dest)->type = STACK_I8; \
189         (dest)->inst_l = (val); \
190 	} while (0)
191 
192 #define NEW_STORE_MEMBASE(cfg,dest,op,base,offset,sr) do { \
193         MONO_INST_NEW ((cfg), (dest), (op)); \
194         (dest)->sreg1 = sr; \
195         (dest)->inst_destbasereg = base; \
196         (dest)->inst_offset = offset; \
197 	} while (0)
198 
199 #define NEW_LOAD_MEMBASE(cfg,dest,op,dr,base,offset) do { \
200         MONO_INST_NEW ((cfg), (dest), (op)); \
201         (dest)->dreg = (dr); \
202         (dest)->inst_basereg = (base); \
203         (dest)->inst_offset = (offset); \
204         (dest)->type = STACK_I4; \
205 	} while (0)
206 
207 #define NEW_LOAD_MEM(cfg,dest,op,dr,mem) do { \
208         MONO_INST_NEW ((cfg), (dest), (op)); \
209         (dest)->dreg = (dr); \
210         (dest)->inst_p0 = (gpointer)(gssize)(mem); \
211         (dest)->type = STACK_I4; \
212 	} while (0)
213 
214 #define NEW_UNALU(cfg,dest,op,dr,sr1) do { \
215         MONO_INST_NEW ((cfg), (dest), (op)); \
216         (dest)->dreg = dr; \
217         (dest)->sreg1 = sr1; \
218     } while (0)
219 
220 #define NEW_BIALU(cfg,dest,op,dr,sr1,sr2) do { \
221         MONO_INST_NEW ((cfg), (dest), (op)); \
222         (dest)->dreg = (dr); \
223         (dest)->sreg1 = (sr1); \
224         (dest)->sreg2 = (sr2); \
225 	} while (0)
226 
227 #define NEW_BIALU_IMM(cfg,dest,op,dr,sr,imm) do { \
228         MONO_INST_NEW ((cfg), (dest), (op)); \
229         (dest)->dreg = dr; \
230         (dest)->sreg1 = sr; \
231         (dest)->inst_imm = (imm); \
232 	} while (0)
233 
234 #define NEW_PATCH_INFO(cfg,dest,el1,el2) do {	\
235         MONO_INST_NEW ((cfg), (dest), OP_PATCH_INFO); \
236 		(dest)->inst_left = (gpointer)(el1);	\
237 		(dest)->inst_right = (gpointer)(el2);	\
238 	} while (0)
239 
240 #define NEW_AOTCONST_GOT_VAR(cfg,dest,patch_type,cons) do {			\
241         MONO_INST_NEW ((cfg), (dest), cfg->compile_aot ? OP_GOT_ENTRY : OP_PCONST); \
242 		if (cfg->compile_aot) {					\
243 			MonoInst *group, *got_loc;		\
244 			got_loc = mono_get_got_var (cfg);		\
245 			NEW_PATCH_INFO ((cfg), group, cons, patch_type); \
246 			(dest)->inst_basereg = got_loc->dreg;			\
247 			(dest)->inst_p1 = group;			\
248 		} else {						\
249 			(dest)->inst_p0 = (cons);			\
250 			(dest)->inst_i1 = (gpointer)(patch_type);	\
251 		}							\
252 		(dest)->type = STACK_PTR;				\
253 		(dest)->dreg = alloc_dreg ((cfg), STACK_PTR);	\
254 	} while (0)
255 
256 #define NEW_AOTCONST_TOKEN_GOT_VAR(cfg,dest,patch_type,image,token,generic_context,stack_type,stack_class) do { \
257 		MonoInst *group, *got_loc;			\
258         MONO_INST_NEW ((cfg), (dest), OP_GOT_ENTRY); \
259 		got_loc = mono_get_got_var (cfg);			\
260 		NEW_PATCH_INFO ((cfg), group, NULL, patch_type);	\
261 		group->inst_p0 = mono_jump_info_token_new2 ((cfg)->mempool, (image), (token), (generic_context)); \
262 		(dest)->inst_basereg = got_loc->dreg;				\
263 		(dest)->inst_p1 = group;				\
264 		(dest)->type = (stack_type);				\
265         (dest)->klass = (stack_class);          \
266 		(dest)->dreg = alloc_dreg ((cfg), (stack_type));	\
267 	} while (0)
268 
269 #define NEW_AOTCONST(cfg,dest,patch_type,cons) do {    \
270 	if (cfg->backend->need_got_var && !cfg->llvm_only) {	\
271 		NEW_AOTCONST_GOT_VAR ((cfg), (dest), (patch_type), (cons)); \
272 	} else { \
273         MONO_INST_NEW ((cfg), (dest), cfg->compile_aot ? OP_AOTCONST : OP_PCONST); \
274 		(dest)->inst_p0 = (cons);	\
275 		(dest)->inst_i1 = (MonoInst *)(patch_type); \
276 		(dest)->type = STACK_PTR;	\
277 		(dest)->dreg = alloc_dreg ((cfg), STACK_PTR);	\
278 	}													\
279     } while (0)
280 
281 #define NEW_AOTCONST_TOKEN(cfg,dest,patch_type,image,token,generic_context,stack_type,stack_class) do { \
282 	if (cfg->backend->need_got_var && !cfg->llvm_only) {	\
283 		NEW_AOTCONST_TOKEN_GOT_VAR ((cfg), (dest), (patch_type), (image), (token), (generic_context), (stack_type), (stack_class)); \
284 	} else { \
285         MONO_INST_NEW ((cfg), (dest), OP_AOTCONST); \
286 		(dest)->inst_p0 = mono_jump_info_token_new2 ((cfg)->mempool, (image), (token), (generic_context)); \
287 		(dest)->inst_p1 = (gpointer)(patch_type); \
288 		(dest)->type = (stack_type);	\
289         (dest)->klass = (stack_class);          \
290 		(dest)->dreg = alloc_dreg ((cfg), (stack_type));	\
291 	} \
292     } while (0)
293 
294 #define NEW_CLASSCONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_CLASS, (val))
295 
296 #define NEW_IMAGECONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_IMAGE, (val))
297 
298 #define NEW_FIELDCONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_FIELD, (val))
299 
300 #define NEW_METHODCONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_METHODCONST, (val))
301 
302 #define NEW_VTABLECONST(cfg,dest,vtable) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_VTABLE, cfg->compile_aot ? (gpointer)((vtable)->klass) : (vtable))
303 
304 #define NEW_SFLDACONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_SFLDA, (val))
305 
306 #define NEW_LDSTRCONST(cfg,dest,image,token) NEW_AOTCONST_TOKEN ((cfg), (dest), MONO_PATCH_INFO_LDSTR, (image), (token), NULL, STACK_OBJ, mono_defaults.string_class)
307 
308 #define NEW_LDSTRLITCONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_LDSTR_LIT, (val))
309 
310 #define NEW_TYPE_FROM_HANDLE_CONST(cfg,dest,image,token,generic_context) NEW_AOTCONST_TOKEN ((cfg), (dest), MONO_PATCH_INFO_TYPE_FROM_HANDLE, (image), (token), (generic_context), STACK_OBJ, mono_defaults.runtimetype_class)
311 
312 #define NEW_LDTOKENCONST(cfg,dest,image,token,generic_context) NEW_AOTCONST_TOKEN ((cfg), (dest), MONO_PATCH_INFO_LDTOKEN, (image), (token), (generic_context), STACK_PTR, NULL)
313 
314 #define NEW_DECLSECCONST(cfg,dest,image,entry) do { \
315 		if (cfg->compile_aot) { \
316 			NEW_AOTCONST_TOKEN (cfg, dest, MONO_PATCH_INFO_DECLSEC, image, (entry).index, NULL, STACK_OBJ, NULL); \
317 		} else { \
318 			NEW_PCONST (cfg, args [0], (entry).blob); \
319 		} \
320 	} while (0)
321 
322 #define NEW_METHOD_RGCTX_CONST(cfg,dest,method) do { \
323 		if (cfg->compile_aot) {											\
324 			NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_METHOD_RGCTX, (method)); \
325 		} else {														\
326 			MonoMethodRuntimeGenericContext *mrgctx;					\
327 			mrgctx = mono_method_lookup_rgctx (mono_class_vtable ((cfg)->domain, (method)->klass), mini_method_get_context ((method))->method_inst); \
328 			NEW_PCONST ((cfg), (dest), (mrgctx));						\
329 		}																\
330 	} while (0)
331 
332 #define NEW_DOMAINCONST(cfg,dest) do { \
333 		if ((cfg->opt & MONO_OPT_SHARED) || cfg->compile_aot) {				 \
334 			/* avoid depending on undefined C behavior in sequence points */ \
335 			MonoInst* __domain_var = mono_get_domainvar (cfg); \
336 			NEW_TEMPLOAD (cfg, dest, __domain_var->inst_c0); \
337 		} else { \
338 			NEW_PCONST (cfg, dest, (cfg)->domain); \
339 		} \
340 	} while (0)
341 
342 #define NEW_JIT_ICALL_ADDRCONST(cfg,dest,name) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_JIT_ICALL_ADDR, (name))
343 
344 #define NEW_VARLOAD(cfg,dest,var,vartype) do { \
345         MONO_INST_NEW ((cfg), (dest), OP_MOVE); \
346 		(dest)->opcode = mono_type_to_regmove ((cfg), (vartype));  \
347 		type_to_eval_stack_type ((cfg), (vartype), (dest));	\
348 		(dest)->klass = var->klass;	\
349 		(dest)->sreg1 = var->dreg;   \
350         (dest)->dreg = alloc_dreg ((cfg), (MonoStackType)(dest)->type); \
351         if ((dest)->opcode == OP_VMOVE) (dest)->klass = mono_class_from_mono_type ((vartype)); \
352 	} while (0)
353 
354 #define DECOMPOSE_INTO_REGPAIR(stack_type) (mono_arch_is_soft_float () ? ((stack_type) == STACK_I8 || (stack_type) == STACK_R8) : ((stack_type) == STACK_I8))
355 
356 static inline void
handle_gsharedvt_ldaddr(MonoCompile * cfg)357 handle_gsharedvt_ldaddr (MonoCompile *cfg)
358 {
359 	/* The decomposition of ldaddr makes use of these two variables, so add uses for them */
360 	MonoInst *use;
361 
362 	MONO_INST_NEW (cfg, use, OP_DUMMY_USE);
363 	use->sreg1 = cfg->gsharedvt_info_var->dreg;
364 	MONO_ADD_INS (cfg->cbb, use);
365 	MONO_INST_NEW (cfg, use, OP_DUMMY_USE);
366 	use->sreg1 = cfg->gsharedvt_locals_var->dreg;
367 	MONO_ADD_INS (cfg->cbb, use);
368 }
369 
370 #define NEW_VARLOADA(cfg,dest,var,vartype) do {	\
371         MONO_INST_NEW ((cfg), (dest), OP_LDADDR); \
372 		(dest)->inst_p0 = (var); \
373 		(var)->flags |= MONO_INST_INDIRECT;	\
374 		(dest)->type = STACK_MP;	\
375 		(dest)->klass = (var)->klass;	\
376         (dest)->dreg = alloc_dreg ((cfg), STACK_MP); \
377 		(cfg)->has_indirection = TRUE;	\
378 			  if (G_UNLIKELY (cfg->gsharedvt) && mini_is_gsharedvt_variable_type ((var)->inst_vtype)) { handle_gsharedvt_ldaddr ((cfg)); } \
379 		if (SIZEOF_REGISTER == 4 && DECOMPOSE_INTO_REGPAIR ((var)->type)) { MonoInst *var1 = get_vreg_to_inst (cfg, MONO_LVREG_LS ((var)->dreg)); MonoInst *var2 = get_vreg_to_inst (cfg, MONO_LVREG_MS ((var)->dreg)); g_assert (var1); g_assert (var2); var1->flags |= MONO_INST_INDIRECT; var2->flags |= MONO_INST_INDIRECT; } \
380 	} while (0)
381 
382 #define NEW_VARSTORE(cfg,dest,var,vartype,inst) do {	\
383         MONO_INST_NEW ((cfg), (dest), OP_MOVE); \
384 		(dest)->opcode = mono_type_to_regmove ((cfg), (vartype));    \
385 		(dest)->klass = (var)->klass;	\
386         (dest)->sreg1 = (inst)->dreg; \
387 		(dest)->dreg = (var)->dreg;   \
388         if ((dest)->opcode == OP_VMOVE) (dest)->klass = mono_class_from_mono_type ((vartype)); \
389 	} while (0)
390 
391 #define NEW_TEMPLOAD(cfg,dest,num) NEW_VARLOAD ((cfg), (dest), (cfg)->varinfo [(num)], (cfg)->varinfo [(num)]->inst_vtype)
392 
393 #define NEW_TEMPLOADA(cfg,dest,num) NEW_VARLOADA ((cfg), (dest), cfg->varinfo [(num)], cfg->varinfo [(num)]->inst_vtype)
394 
395 #define NEW_TEMPSTORE(cfg,dest,num,inst) NEW_VARSTORE ((cfg), (dest), (cfg)->varinfo [(num)], (cfg)->varinfo [(num)]->inst_vtype, (inst))
396 
397 #define NEW_ARGLOAD(cfg,dest,num) NEW_VARLOAD ((cfg), (dest), cfg->args [(num)], cfg->arg_types [(num)])
398 
399 #define NEW_LOCLOAD(cfg,dest,num) NEW_VARLOAD ((cfg), (dest), cfg->locals [(num)], header->locals [(num)])
400 
401 #define NEW_LOCSTORE(cfg,dest,num,inst) NEW_VARSTORE ((cfg), (dest), (cfg)->locals [(num)], (cfg)->locals [(num)]->inst_vtype, (inst))
402 
403 #define NEW_ARGSTORE(cfg,dest,num,inst) NEW_VARSTORE ((cfg), (dest), cfg->args [(num)], cfg->arg_types [(num)], (inst))
404 
405 #define NEW_LOCLOADA(cfg,dest,num) NEW_VARLOADA ((cfg), (dest), (cfg)->locals [(num)], (cfg)->locals [(num)]->inst_vtype)
406 
407 #define NEW_RETLOADA(cfg,dest) do {	\
408         MONO_INST_NEW ((cfg), (dest), OP_MOVE); \
409         (dest)->type = STACK_MP; \
410 	    (dest)->klass = cfg->ret->klass;	\
411 	    (dest)->sreg1 = cfg->vret_addr->dreg;   \
412         (dest)->dreg = alloc_dreg ((cfg), (MonoStackType)(dest)->type); \
413 	} while (0)
414 
415 #define NEW_ARGLOADA(cfg,dest,num) NEW_VARLOADA ((cfg), (dest), arg_array [(num)], param_types [(num)])
416 
417 /* Promote the vreg to a variable so its address can be taken */
418 #define NEW_VARLOADA_VREG(cfg,dest,vreg,ltype) do { \
419         MonoInst *var = get_vreg_to_inst ((cfg), (vreg)); \
420         if (!var) \
421 		    var = mono_compile_create_var_for_vreg ((cfg), (ltype), OP_LOCAL, (vreg)); \
422         NEW_VARLOADA ((cfg), (dest), (var), (ltype)); \
423     } while (0)
424 
425 #define NEW_DUMMY_USE(cfg,dest,var) do { \
426         MONO_INST_NEW ((cfg), (dest), OP_DUMMY_USE); \
427 		(dest)->sreg1 = var->dreg; \
428     } while (0)
429 
430 /* Variants which take a type argument and handle vtypes as well */
431 #define NEW_LOAD_MEMBASE_TYPE(cfg,dest,ltype,base,offset) do { \
432 	    NEW_LOAD_MEMBASE ((cfg), (dest), mono_type_to_load_membase ((cfg), (ltype)), 0, (base), (offset)); \
433 	    type_to_eval_stack_type ((cfg), (ltype), (dest)); \
434 	    (dest)->dreg = alloc_dreg ((cfg), (MonoStackType)(dest)->type); \
435     } while (0)
436 
437 #define NEW_STORE_MEMBASE_TYPE(cfg,dest,ltype,base,offset,sr) do { \
438         MONO_INST_NEW ((cfg), (dest), mono_type_to_store_membase ((cfg), (ltype))); \
439         (dest)->sreg1 = sr; \
440         (dest)->inst_destbasereg = base; \
441         (dest)->inst_offset = offset; \
442 	    type_to_eval_stack_type ((cfg), (ltype), (dest)); \
443         (dest)->klass = mono_class_from_mono_type (ltype); \
444 	} while (0)
445 
446 #define NEW_SEQ_POINT(cfg,dest,il_offset,intr_loc) do {	 \
447 	MONO_INST_NEW ((cfg), (dest), cfg->gen_sdb_seq_points ? OP_SEQ_POINT : OP_IL_SEQ_POINT); \
448 	(dest)->inst_imm = (il_offset); \
449 	(dest)->flags = intr_loc ? MONO_INST_SINGLE_STEP_LOC : 0; \
450 	} while (0)
451 
452 #define NEW_GC_PARAM_SLOT_LIVENESS_DEF(cfg,dest,offset,type) do { \
453 	MONO_INST_NEW ((cfg), (dest), OP_GC_PARAM_SLOT_LIVENESS_DEF); \
454 	(dest)->inst_offset = (offset); \
455 	(dest)->inst_vtype = (type); \
456 	} while (0)
457 
458 /*
459  * Variants which do an emit as well.
460  */
461 #define EMIT_NEW_ICONST(cfg,dest,val) do { NEW_ICONST ((cfg), (dest), (val)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
462 
463 #define EMIT_NEW_PCONST(cfg,dest,val) do { NEW_PCONST ((cfg), (dest), (val)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
464 
465 #define	EMIT_NEW_I8CONST(cfg,dest,val) do { NEW_I8CONST ((cfg), (dest), (val)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
466 
467 #define EMIT_NEW_AOTCONST(cfg,dest,patch_type,cons) do { NEW_AOTCONST ((cfg), (dest), (patch_type), (cons)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
468 
469 #define EMIT_NEW_AOTCONST_TOKEN(cfg,dest,patch_type,image,token,stack_type,stack_class) do { NEW_AOTCONST_TOKEN ((cfg), (dest), (patch_type), (image), (token), NULL, (stack_type), (stack_class)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
470 
471 #define EMIT_NEW_CLASSCONST(cfg,dest,val) do { NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_CLASS, (val)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
472 
473 #define EMIT_NEW_IMAGECONST(cfg,dest,val) do { NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_IMAGE, (val)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
474 
475 #define EMIT_NEW_FIELDCONST(cfg,dest,val) do { NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_FIELD, (val)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
476 
477 #define EMIT_NEW_METHODCONST(cfg,dest,val) do { NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_METHODCONST, (val)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
478 
479 #define EMIT_NEW_VTABLECONST(cfg,dest,vtable) do { NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_VTABLE, cfg->compile_aot ? (gpointer)((vtable)->klass) : (vtable)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
480 
481 #define EMIT_NEW_SFLDACONST(cfg,dest,val) do { NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_SFLDA, (val)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
482 
483 #define EMIT_NEW_LDSTRCONST(cfg,dest,image,token) do { NEW_AOTCONST_TOKEN ((cfg), (dest), MONO_PATCH_INFO_LDSTR, (image), (token), NULL, STACK_OBJ, mono_defaults.string_class); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
484 
485 #define EMIT_NEW_LDSTRLITCONST(cfg,dest,val) do { NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_LDSTR_LIT, (val)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
486 
487 #define EMIT_NEW_TYPE_FROM_HANDLE_CONST(cfg,dest,image,token,generic_context) do { NEW_AOTCONST_TOKEN ((cfg), (dest), MONO_PATCH_INFO_TYPE_FROM_HANDLE, (image), (token), (generic_context), STACK_OBJ, mono_defaults.runtimetype_class); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
488 
489 #define EMIT_NEW_LDTOKENCONST(cfg,dest,image,token,generic_context) do { NEW_AOTCONST_TOKEN ((cfg), (dest), MONO_PATCH_INFO_LDTOKEN, (image), (token), (generic_context), STACK_PTR, NULL); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
490 
491 #define EMIT_NEW_TLS_OFFSETCONST(cfg,dest,key) do { NEW_TLS_OFFSETCONST ((cfg), (dest), (key)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
492 
493 #define EMIT_NEW_DOMAINCONST(cfg,dest) do { NEW_DOMAINCONST ((cfg), (dest)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
494 
495 #define EMIT_NEW_DECLSECCONST(cfg,dest,image,entry) do { NEW_DECLSECCONST ((cfg), (dest), (image), (entry)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
496 
497 #define EMIT_NEW_METHOD_RGCTX_CONST(cfg,dest,method) do { NEW_METHOD_RGCTX_CONST ((cfg), (dest), (method)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
498 
499 #define EMIT_NEW_JIT_ICALL_ADDRCONST(cfg,dest,name) do { NEW_JIT_ICALL_ADDRCONST ((cfg), (dest), (name)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
500 
501 #define EMIT_NEW_VARLOAD(cfg,dest,var,vartype) do { NEW_VARLOAD ((cfg), (dest), (var), (vartype)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
502 
503 #define EMIT_NEW_VARSTORE(cfg,dest,var,vartype,inst) do { NEW_VARSTORE ((cfg), (dest), (var), (vartype), (inst)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
504 
505 #define EMIT_NEW_VARLOADA(cfg,dest,var,vartype) do { NEW_VARLOADA ((cfg), (dest), (var), (vartype)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
506 
507 #ifdef MONO_ARCH_SOFT_FLOAT_FALLBACK
508 
509 /*
510  * Since the IL stack (and our vregs) contain double values, we have to do a conversion
511  * when loading/storing args/locals of type R4.
512  */
513 
514 #define EMIT_NEW_VARLOAD_SFLOAT(cfg,dest,var,vartype) do { \
515 		if (!COMPILE_LLVM ((cfg)) && !(vartype)->byref && (vartype)->type == MONO_TYPE_R4) { \
516 			MonoInst *iargs [1]; \
517 			EMIT_NEW_VARLOADA (cfg, iargs [0], (var), (vartype)); \
518 			(dest) = mono_emit_jit_icall (cfg, mono_fload_r4, iargs); \
519 		} else { \
520 			EMIT_NEW_VARLOAD ((cfg), (dest), (var), (vartype)); \
521 		} \
522 	} while (0)
523 
524 #define EMIT_NEW_VARSTORE_SFLOAT(cfg,dest,var,vartype,inst) do {	\
525 		if (COMPILE_SOFT_FLOAT ((cfg)) && !(vartype)->byref && (vartype)->type == MONO_TYPE_R4) { \
526 			MonoInst *iargs [2]; \
527 			iargs [0] = (inst); \
528 			EMIT_NEW_VARLOADA (cfg, iargs [1], (var), (vartype)); \
529 			(dest) = mono_emit_jit_icall (cfg, mono_fstore_r4, iargs);	\
530 		} else { \
531 			EMIT_NEW_VARSTORE ((cfg), (dest), (var), (vartype), (inst)); \
532 		} \
533 	} while (0)
534 
535 #define EMIT_NEW_ARGLOAD(cfg,dest,num) do {	\
536 		if (mono_arch_is_soft_float ()) {	\
537 			EMIT_NEW_VARLOAD_SFLOAT ((cfg), (dest), cfg->args [(num)], cfg->arg_types [(num)]);	\
538 		} else {	\
539 			NEW_ARGLOAD ((cfg), (dest), (num));	\
540 			MONO_ADD_INS ((cfg)->cbb, (dest));	\
541 		}	\
542 	} while (0)
543 
544 #define EMIT_NEW_LOCLOAD(cfg,dest,num) do {	\
545 		if (mono_arch_is_soft_float ()) {	\
546 			EMIT_NEW_VARLOAD_SFLOAT ((cfg), (dest), cfg->locals [(num)], header->locals [(num)]);	\
547 		} else {	\
548 			NEW_LOCLOAD ((cfg), (dest), (num));	\
549 			MONO_ADD_INS ((cfg)->cbb, (dest));	\
550 		}	\
551 	} while (0)
552 
553 #define EMIT_NEW_LOCSTORE(cfg,dest,num,inst) do {	\
554 		if (mono_arch_is_soft_float ()) {	\
555 			EMIT_NEW_VARSTORE_SFLOAT ((cfg), (dest), (cfg)->locals [(num)], (cfg)->locals [(num)]->inst_vtype, (inst));	\
556 		} else {	\
557 			NEW_LOCSTORE ((cfg), (dest), (num), (inst));	\
558 			MONO_ADD_INS ((cfg)->cbb, (dest));	\
559 		}	\
560 	} while (0)
561 
562 #define EMIT_NEW_ARGSTORE(cfg,dest,num,inst) do {	\
563 		if (mono_arch_is_soft_float ()) {	\
564 			EMIT_NEW_VARSTORE_SFLOAT ((cfg), (dest), cfg->args [(num)], cfg->arg_types [(num)], (inst));	\
565 		} else {	\
566 			NEW_ARGSTORE ((cfg), (dest), (num), (inst));	\
567 			MONO_ADD_INS ((cfg)->cbb, (dest));	\
568 		}	\
569 	} while (0)
570 
571 #else
572 
573 #define EMIT_NEW_ARGLOAD(cfg,dest,num) do { NEW_ARGLOAD ((cfg), (dest), (num)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
574 
575 #define EMIT_NEW_LOCLOAD(cfg,dest,num) do { NEW_LOCLOAD ((cfg), (dest), (num)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
576 
577 #define EMIT_NEW_LOCSTORE(cfg,dest,num,inst) do { NEW_LOCSTORE ((cfg), (dest), (num), (inst)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
578 
579 #define EMIT_NEW_ARGSTORE(cfg,dest,num,inst) do { NEW_ARGSTORE ((cfg), (dest), (num), (inst)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
580 
581 #endif
582 
583 #define EMIT_NEW_TEMPLOAD(cfg,dest,num) do { NEW_TEMPLOAD ((cfg), (dest), (num)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
584 
585 #define EMIT_NEW_TEMPLOADA(cfg,dest,num) do { NEW_TEMPLOADA ((cfg), (dest), (num)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
586 
587 #define EMIT_NEW_LOCLOADA(cfg,dest,num) do { NEW_LOCLOADA ((cfg), (dest), (num)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
588 
589 #define EMIT_NEW_ARGLOADA(cfg,dest,num) do { NEW_ARGLOADA ((cfg), (dest), (num)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
590 
591 #define EMIT_NEW_RETLOADA(cfg,dest) do { NEW_RETLOADA ((cfg), (dest)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
592 
593 #define EMIT_NEW_TEMPSTORE(cfg,dest,num,inst) do { NEW_TEMPSTORE ((cfg), (dest), (num), (inst)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
594 
595 #define EMIT_NEW_VARLOADA_VREG(cfg,dest,vreg,ltype) do { NEW_VARLOADA_VREG ((cfg), (dest), (vreg), (ltype)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
596 
597 #define EMIT_NEW_DUMMY_USE(cfg,dest,var) do { NEW_DUMMY_USE ((cfg), (dest), (var)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
598 
599 #define EMIT_NEW_UNALU(cfg,dest,op,dr,sr1) do { NEW_UNALU ((cfg), (dest), (op), (dr), (sr1)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
600 
601 #define EMIT_NEW_BIALU(cfg,dest,op,dr,sr1,sr2) do { NEW_BIALU ((cfg), (dest), (op), (dr), (sr1), (sr2)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
602 
603 #define EMIT_NEW_BIALU_IMM(cfg,dest,op,dr,sr,imm) do { NEW_BIALU_IMM ((cfg), (dest), (op), (dr), (sr), (imm)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
604 
605 #define EMIT_NEW_LOAD_MEMBASE(cfg,dest,op,dr,base,offset) do { NEW_LOAD_MEMBASE ((cfg), (dest), (op), (dr), (base), (offset)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
606 
607 #define EMIT_NEW_STORE_MEMBASE(cfg,dest,op,base,offset,sr) do { NEW_STORE_MEMBASE ((cfg), (dest), (op), (base), (offset), (sr)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
608 
609 #define EMIT_NEW_LOAD_MEMBASE_TYPE(cfg,dest,ltype,base,offset) do { NEW_LOAD_MEMBASE_TYPE ((cfg), (dest), (ltype), (base), (offset)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
610 
611 #define EMIT_NEW_STORE_MEMBASE_TYPE(cfg,dest,ltype,base,offset,sr) do { NEW_STORE_MEMBASE_TYPE ((cfg), (dest), (ltype), (base), (offset), (sr)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
612 
613 #define EMIT_NEW_GC_PARAM_SLOT_LIVENESS_DEF(cfg,dest,offset,type) do { NEW_GC_PARAM_SLOT_LIVENESS_DEF ((cfg), (dest), (offset), (type)); MONO_ADD_INS ((cfg)->cbb, (dest)); } while (0)
614 /*
615  * Variants which do not take an dest argument, but take a dreg argument.
616  */
617 #define	MONO_EMIT_NEW_ICONST(cfg,dr,imm) do { \
618         MonoInst *inst; \
619         MONO_INST_NEW ((cfg), (inst), OP_ICONST); \
620         inst->dreg = dr; \
621         inst->inst_c0 = imm; \
622 	    MONO_ADD_INS ((cfg)->cbb, inst); \
623 	} while (0)
624 
625 #define MONO_EMIT_NEW_PCONST(cfg,dr,val) do {	\
626         MonoInst *inst; \
627         MONO_INST_NEW ((cfg), (inst), OP_PCONST); \
628         inst->dreg = dr; \
629 		(inst)->inst_p0 = (val);	\
630 		(inst)->type = STACK_PTR;	\
631 	    MONO_ADD_INS ((cfg)->cbb, inst); \
632 	} while (0)
633 
634 #define	MONO_EMIT_NEW_I8CONST(cfg,dr,imm) do { \
635         MonoInst *inst; \
636         MONO_INST_NEW ((cfg), (inst), OP_I8CONST); \
637         inst->dreg = dr; \
638         inst->inst_l = imm; \
639 	    MONO_ADD_INS ((cfg)->cbb, inst); \
640 	} while (0)
641 
642 #define MONO_EMIT_NEW_DUMMY_INIT(cfg,dr,op) do {			  \
643 		MonoInst *inst;										  \
644 		MONO_INST_NEW ((cfg), (inst), (op));				  \
645 		inst->dreg = dr;									  \
646 		MONO_ADD_INS ((cfg)->cbb, inst);					  \
647 	} while (0)
648 
649 #ifdef MONO_ARCH_NEED_GOT_VAR
650 
651 #define MONO_EMIT_NEW_AOTCONST(cfg,dr,cons,patch_type) do { \
652         MonoInst *inst; \
653         NEW_AOTCONST ((cfg), (inst), (patch_type), (cons)); \
654         inst->dreg = (dr); \
655         MONO_ADD_INS ((cfg)->cbb, inst); \
656     } while (0)
657 
658 #else
659 
660 #define	MONO_EMIT_NEW_AOTCONST(cfg,dr,imm,type) do { \
661         MonoInst *inst; \
662         MONO_INST_NEW ((cfg), (inst), cfg->compile_aot ? OP_AOTCONST : OP_PCONST); \
663         inst->dreg = dr; \
664         inst->inst_p0 = imm; \
665         inst->inst_c1 = type; \
666 		MONO_ADD_INS ((cfg)->cbb, inst); \
667 	} while (0)
668 
669 #endif
670 
671 #define	MONO_EMIT_NEW_CLASSCONST(cfg,dr,imm) MONO_EMIT_NEW_AOTCONST(cfg,dr,imm,MONO_PATCH_INFO_CLASS)
672 #define MONO_EMIT_NEW_VTABLECONST(cfg,dest,vtable) MONO_EMIT_NEW_AOTCONST ((cfg), (dest), (cfg)->compile_aot ? (gpointer)((vtable)->klass) : (vtable), MONO_PATCH_INFO_VTABLE)
673 #define MONO_EMIT_NEW_SIGNATURECONST(cfg,dr,sig) MONO_EMIT_NEW_AOTCONST ((cfg), (dr), (sig), MONO_PATCH_INFO_SIGNATURE)
674 
675 #define MONO_EMIT_NEW_VZERO(cfg,dr,kl) do {	\
676         MonoInst *inst; \
677         MONO_INST_NEW ((cfg), (inst), MONO_CLASS_IS_SIMD (cfg, kl) ? OP_XZERO : OP_VZERO); \
678         inst->dreg = dr; \
679 		(inst)->type = STACK_VTYPE;	\
680         (inst)->klass = (kl); \
681 	    MONO_ADD_INS ((cfg)->cbb, inst); \
682 	} while (0)
683 
684 #define MONO_EMIT_NEW_UNALU(cfg,op,dr,sr1) do { \
685         MonoInst *inst; \
686         EMIT_NEW_UNALU ((cfg), (inst), (op), (dr), (sr1)); \
687 	} while (0)
688 
689 #define MONO_EMIT_NEW_BIALU(cfg,op,dr,sr1,sr2) do { \
690         MonoInst *inst; \
691         MONO_INST_NEW ((cfg), (inst), (op)); \
692         inst->dreg = dr; \
693         inst->sreg1 = sr1; \
694         inst->sreg2 = sr2; \
695 	    MONO_ADD_INS (cfg->cbb, inst); \
696 	} while (0)
697 
698 #define MONO_EMIT_NEW_BIALU_IMM(cfg,op,dr,sr,imm) do { \
699         MonoInst *inst; \
700         MONO_INST_NEW ((cfg), (inst), (op)); \
701         inst->dreg = dr; \
702         inst->sreg1 = sr; \
703         inst->inst_imm = (mgreg_t)(imm);		\
704 	    MONO_ADD_INS (cfg->cbb, inst); \
705 	} while (0)
706 
707 #define	MONO_EMIT_NEW_COMPARE_IMM(cfg,sr1,imm) do { \
708         MonoInst *inst; \
709         MONO_INST_NEW ((cfg), (inst), (OP_COMPARE_IMM)); \
710         inst->sreg1 = sr1; \
711         inst->inst_imm = (imm);			 \
712 	    MONO_ADD_INS ((cfg)->cbb, inst); \
713 	} while (0)
714 
715 #define	MONO_EMIT_NEW_ICOMPARE_IMM(cfg,sr1,imm) do { \
716         MonoInst *inst; \
717         MONO_INST_NEW ((cfg), (inst), sizeof (mgreg_t) == 8 ? OP_ICOMPARE_IMM : OP_COMPARE_IMM); \
718         inst->sreg1 = sr1; \
719         inst->inst_imm = (imm);			 \
720 	    MONO_ADD_INS ((cfg)->cbb, inst); \
721 	} while (0)
722 
723 /* This is used on 32 bit machines too when running with LLVM */
724 #define	MONO_EMIT_NEW_LCOMPARE_IMM(cfg,sr1,imm) do { \
725         MonoInst *inst; \
726         MONO_INST_NEW ((cfg), (inst), (OP_LCOMPARE_IMM)); \
727         inst->sreg1 = sr1;									\
728         if (SIZEOF_REGISTER == 4 && COMPILE_LLVM (cfg))  { 	\
729 			guint64 _l = (imm);								\
730 			inst->inst_imm = _l & 0xffffffff;				\
731 			inst->inst_offset = _l >> 32;						\
732 		} else { \
733 			inst->inst_imm = (imm);		 \
734 		}								 \
735 	    MONO_ADD_INS ((cfg)->cbb, inst); \
736 	} while (0)
737 
738 #define MONO_EMIT_NEW_LOAD_MEMBASE_OP(cfg,op,dr,base,offset) do { \
739         MonoInst *inst; \
740         MONO_INST_NEW ((cfg), (inst), (op)); \
741         inst->dreg = dr; \
742         inst->inst_basereg = base; \
743         inst->inst_offset = offset; \
744 	    MONO_ADD_INS (cfg->cbb, inst); \
745     } while (0)
746 
747 #define MONO_EMIT_NEW_LOAD_MEMBASE(cfg,dr,base,offset) MONO_EMIT_NEW_LOAD_MEMBASE_OP ((cfg), (OP_LOAD_MEMBASE), (dr), (base), (offset))
748 
749 #define MONO_EMIT_NEW_STORE_MEMBASE(cfg,op,base,offset,sr) do { \
750         MonoInst *inst; \
751         MONO_INST_NEW ((cfg), (inst), (op)); \
752         (inst)->sreg1 = sr; \
753         (inst)->inst_destbasereg = base; \
754         (inst)->inst_offset = offset; \
755 	    MONO_ADD_INS (cfg->cbb, inst); \
756 	} while (0)
757 
758 #define MONO_EMIT_NEW_STORE_MEMBASE_IMM(cfg,op,base,offset,imm) do { \
759         MonoInst *inst; \
760         MONO_INST_NEW ((cfg), (inst), (op)); \
761         inst->inst_destbasereg = base; \
762         inst->inst_offset = offset; \
763         inst->inst_imm = (mgreg_t)(imm); \
764         MONO_ADD_INS ((cfg)->cbb, inst); \
765 	} while (0)
766 
767 #define	MONO_EMIT_NEW_COND_EXC(cfg,cond,name) do { \
768         MonoInst *inst; \
769         MONO_INST_NEW ((cfg), (inst), (OP_COND_EXC_##cond)); \
770         inst->inst_p1 = (char*)name; \
771 	    MONO_ADD_INS ((cfg)->cbb, inst); \
772 	} while (0)
773 
774 /* Branch support */
775 
776 /*
777  * Basic blocks have two numeric identifiers:
778  * dfn: Depth First Number
779  * block_num: unique ID assigned at bblock creation
780  */
781 #define NEW_BBLOCK(cfg,bblock) do { \
782 	(bblock) = (MonoBasicBlock *)mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoBasicBlock)); \
783 	(bblock)->block_num = cfg->num_bblocks++; \
784     } while (0)
785 
786 #define ADD_BBLOCK(cfg,b) do {	\
787         if ((b)->cil_code)  {\
788 			cfg->cil_offset_to_bb [(b)->cil_code - cfg->cil_start] = (b);	\
789         } \
790 		(b)->real_offset = cfg->real_offset;	\
791 	} while (0)
792 
793 /*
794  * Emit a one-way conditional branch and start a new bblock.
795  * The inst_false_bb field of the cond branch will not be set, the JIT code should be
796  * prepared to deal with this.
797  */
798 #ifdef DEBUG_EXTENDED_BBLOCKS
799 static int ccount = 0;
800 #define MONO_EMIT_NEW_BRANCH_BLOCK(cfg,op,truebb) do { \
801         MonoInst *ins; \
802         MonoBasicBlock *falsebb; \
803         MONO_INST_NEW ((cfg), (ins), (op)); \
804         if ((op) == OP_BR) { \
805 	        NEW_BBLOCK ((cfg), falsebb); \
806             ins->inst_target_bb = (truebb); \
807             mono_link_bblock ((cfg), (cfg)->cbb, (truebb)); \
808             MONO_ADD_INS ((cfg)->cbb, ins); \
809             MONO_START_BB ((cfg), falsebb); \
810         } else { \
811             ccount ++; \
812 		    ins->inst_many_bb = mono_mempool_alloc (cfg->mempool, sizeof(gpointer)*2);	\
813             ins->inst_true_bb = (truebb); \
814             ins->inst_false_bb = NULL; \
815             mono_link_bblock ((cfg), (cfg)->cbb, (truebb)); \
816             MONO_ADD_INS ((cfg)->cbb, ins); \
817             char *count2 = g_getenv ("COUNT2"); \
818             if (count2 && ccount == atoi (count2) - 1) { printf ("HIT: %d\n", cfg->cbb->block_num); } \
819             if (count2 && ccount < atoi (count2)) { \
820                  cfg->cbb->extended = TRUE; \
821             } else { NEW_BBLOCK ((cfg), falsebb); ins->inst_false_bb = (falsebb); mono_link_bblock ((cfg), (cfg)->cbb, (falsebb)); MONO_START_BB ((cfg), falsebb); } \
822             if (count2) g_free (count2); \
823         } \
824 	} while (0)
825 #else
826 #define MONO_EMIT_NEW_BRANCH_BLOCK(cfg,op,truebb) do { \
827         MonoInst *ins; \
828         MonoBasicBlock *falsebb; \
829         MONO_INST_NEW ((cfg), (ins), (op)); \
830         if ((op) == OP_BR) { \
831 	        NEW_BBLOCK ((cfg), falsebb); \
832             ins->inst_target_bb = (truebb); \
833             mono_link_bblock ((cfg), (cfg)->cbb, (truebb)); \
834             MONO_ADD_INS ((cfg)->cbb, ins); \
835             MONO_START_BB ((cfg), falsebb); \
836         } else { \
837 		    ins->inst_many_bb = (MonoBasicBlock **)mono_mempool_alloc (cfg->mempool, sizeof(gpointer)*2);	\
838             ins->inst_true_bb = (truebb); \
839             ins->inst_false_bb = NULL; \
840             mono_link_bblock ((cfg), (cfg)->cbb, (truebb)); \
841             MONO_ADD_INS ((cfg)->cbb, ins); \
842             if (!cfg->enable_extended_bblocks) { \
843                 NEW_BBLOCK ((cfg), falsebb); \
844                 ins->inst_false_bb = falsebb; \
845                 mono_link_bblock ((cfg), (cfg)->cbb, (falsebb)); \
846                 MONO_START_BB ((cfg), falsebb); \
847             } else { \
848 				cfg->cbb->extended = TRUE; \
849 			} \
850         } \
851 	} while (0)
852 #endif
853 
854 /* Emit a two-way conditional branch */
855 #define	MONO_EMIT_NEW_BRANCH_BLOCK2(cfg,op,truebb,falsebb) do { \
856         MonoInst *ins; \
857         MONO_INST_NEW ((cfg), (ins), (op)); \
858 		ins->inst_many_bb = (MonoBasicBlock **)mono_mempool_alloc (cfg->mempool, sizeof(gpointer)*2);	\
859         ins->inst_true_bb = (truebb); \
860         ins->inst_false_bb = (falsebb); \
861         mono_link_bblock ((cfg), (cfg)->cbb, (truebb)); \
862         mono_link_bblock ((cfg), (cfg)->cbb, (falsebb)); \
863         MONO_ADD_INS ((cfg)->cbb, ins); \
864 	} while (0)
865 
866 #define MONO_START_BB(cfg, bblock) do { \
867         ADD_BBLOCK ((cfg), (bblock)); \
868         if (cfg->cbb->last_ins && MONO_IS_COND_BRANCH_OP (cfg->cbb->last_ins) && !cfg->cbb->last_ins->inst_false_bb) { \
869             cfg->cbb->last_ins->inst_false_bb = (bblock); \
870             mono_link_bblock ((cfg), (cfg)->cbb, (bblock)); \
871         } else if (! (cfg->cbb->last_ins && ((cfg->cbb->last_ins->opcode == OP_BR) || (cfg->cbb->last_ins->opcode == OP_BR_REG) || MONO_IS_COND_BRANCH_OP (cfg->cbb->last_ins)))) \
872             mono_link_bblock ((cfg), (cfg)->cbb, (bblock)); \
873 	    (cfg)->cbb->next_bb = (bblock); \
874 	    (cfg)->cbb = (bblock); \
875     } while (0)
876 
877 /* This marks a place in code where an implicit exception could be thrown */
878 #define MONO_EMIT_NEW_IMPLICIT_EXCEPTION(cfg) do { \
879 		if (COMPILE_LLVM ((cfg))) {									\
880 			MONO_EMIT_NEW_UNALU (cfg, OP_IMPLICIT_EXCEPTION, -1, -1);	\
881 		} \
882 	} while (0)
883 
884 /* Loads/Stores which can fault are handled correctly by the LLVM mono branch */
885 #define MONO_EMIT_NEW_IMPLICIT_EXCEPTION_LOAD_STORE(cfg) do { \
886     } while (0)
887 
888 /* Emit an explicit null check which doesn't depend on SIGSEGV signal handling */
889 #define MONO_EMIT_NULL_CHECK(cfg, reg) do { \
890 		if (cfg->explicit_null_checks) {							  \
891 			MONO_EMIT_NEW_BIALU_IMM (cfg, OP_COMPARE_IMM, -1, (reg), 0); \
892 			MONO_EMIT_NEW_COND_EXC (cfg, EQ, "NullReferenceException"); \
893 		} else {			\
894 			MONO_EMIT_NEW_IMPLICIT_EXCEPTION_LOAD_STORE (cfg);						\
895 		}																\
896 	} while (0)
897 
898 #define MONO_EMIT_NEW_CHECK_THIS(cfg, sreg) do { \
899 		cfg->flags |= MONO_CFG_HAS_CHECK_THIS;	 \
900 		if (cfg->explicit_null_checks) {		 \
901 			MONO_EMIT_NULL_CHECK (cfg, sreg);				\
902 		} else {											\
903 			MONO_EMIT_NEW_UNALU (cfg, OP_CHECK_THIS, -1, sreg);			\
904 			MONO_EMIT_NEW_IMPLICIT_EXCEPTION_LOAD_STORE (cfg);			\
905 		}																\
906 		MONO_EMIT_NEW_UNALU (cfg, OP_NOT_NULL, -1, sreg);				\
907 	} while (0)
908 
909 #define NEW_LOAD_MEMBASE_FLAGS(cfg,dest,op,dr,base,offset,ins_flags) do {	\
910 		int __ins_flags = ins_flags; \
911 		if (__ins_flags & MONO_INST_FAULT) {								\
912 			MONO_EMIT_NULL_CHECK ((cfg), (base));						\
913 		}																\
914 		NEW_LOAD_MEMBASE ((cfg), (dest), (op), (dr), (base), (offset));	\
915 		(dest)->flags = (__ins_flags);									\
916 	} while (0)
917 
918 #define MONO_EMIT_NEW_LOAD_MEMBASE_OP_FLAGS(cfg,op,dr,base,offset,ins_flags) do { \
919         MonoInst *inst;													\
920 		int __ins_flags = ins_flags; \
921 	    if (__ins_flags & MONO_INST_FAULT) {									\
922 			MONO_EMIT_NULL_CHECK ((cfg), (base));						\
923 		}																\
924 		NEW_LOAD_MEMBASE ((cfg), (inst), (op), (dr), (base), (offset)); \
925 		inst->flags = (__ins_flags); \
926 	    MONO_ADD_INS (cfg->cbb, inst); \
927     } while (0)
928 
929 #define MONO_EMIT_NEW_LOAD_MEMBASE_FLAGS(cfg,dr,base,offset,ins_flags) MONO_EMIT_NEW_LOAD_MEMBASE_OP_FLAGS ((cfg), (OP_LOAD_MEMBASE), (dr), (base), (offset),(ins_flags))
930 
931 /* A load which can cause a nullref */
932 #define NEW_LOAD_MEMBASE_FAULT(cfg,dest,op,dr,base,offset) NEW_LOAD_MEMBASE_FLAGS ((cfg), (dest), (op), (dr), (base), (offset), MONO_INST_FAULT)
933 
934 #define EMIT_NEW_LOAD_MEMBASE_FAULT(cfg,dest,op,dr,base,offset) do { \
935 		NEW_LOAD_MEMBASE_FAULT ((cfg), (dest), (op), (dr), (base), (offset)); \
936 		MONO_ADD_INS ((cfg)->cbb, (dest)); \
937 	} while (0)
938 
939 #define MONO_EMIT_NEW_LOAD_MEMBASE_OP_FAULT(cfg,op,dr,base,offset) MONO_EMIT_NEW_LOAD_MEMBASE_OP_FLAGS ((cfg), (op), (dr), (base), (offset), MONO_INST_FAULT)
940 
941 #define MONO_EMIT_NEW_LOAD_MEMBASE_FAULT(cfg,dr,base,offset) MONO_EMIT_NEW_LOAD_MEMBASE_OP_FAULT ((cfg), (OP_LOAD_MEMBASE), (dr), (base), (offset))
942 
943 #define NEW_LOAD_MEMBASE_INVARIANT(cfg,dest,op,dr,base,offset) NEW_LOAD_MEMBASE_FLAGS ((cfg), (dest), (op), (dr), (base), (offset), MONO_INST_INVARIANT_LOAD)
944 
945 #define MONO_EMIT_NEW_LOAD_MEMBASE_OP_INVARIANT(cfg,op,dr,base,offset) MONO_EMIT_NEW_LOAD_MEMBASE_OP_FLAGS ((cfg), (op), (dr), (base), (offset), MONO_INST_INVARIANT_LOAD)
946 
947 #define MONO_EMIT_NEW_LOAD_MEMBASE_INVARIANT(cfg,dr,base,offset) MONO_EMIT_NEW_LOAD_MEMBASE_OP_INVARIANT ((cfg), (OP_LOAD_MEMBASE), (dr), (base), (offset))
948 
949 /*Object Model related macros*/
950 
951 /* Default bounds check implementation for most architectures + llvm */
952 #define MONO_EMIT_DEFAULT_BOUNDS_CHECK(cfg, array_reg, offset, index_reg, fault) do { \
953 			int _length_reg = alloc_ireg (cfg); \
954 			if (fault) \
955 				MONO_EMIT_NEW_LOAD_MEMBASE_OP_FAULT (cfg, OP_LOADI4_MEMBASE, _length_reg, array_reg, offset); \
956 			else \
957 				MONO_EMIT_NEW_LOAD_MEMBASE_OP_FLAGS (cfg, OP_LOADI4_MEMBASE, _length_reg, array_reg, offset, MONO_INST_INVARIANT_LOAD); \
958 			MONO_EMIT_NEW_BIALU (cfg, OP_COMPARE, -1, _length_reg, index_reg); \
959 			MONO_EMIT_NEW_COND_EXC (cfg, LE_UN, "IndexOutOfRangeException"); \
960 	} while (0)
961 
962 #ifndef MONO_ARCH_EMIT_BOUNDS_CHECK
963 #define MONO_ARCH_EMIT_BOUNDS_CHECK(cfg, array_reg, offset, index_reg) MONO_EMIT_DEFAULT_BOUNDS_CHECK ((cfg), (array_reg), (offset), (index_reg), TRUE)
964 #endif
965 
966 /* cfg is the MonoCompile been used
967  * array_reg is the vreg holding the array object
968  * array_type is a struct (usually MonoArray or MonoString)
969  * array_length_field is the field in the previous struct with the length
970  * index_reg is the vreg holding the index
971  */
972 #define MONO_EMIT_BOUNDS_CHECK(cfg, array_reg, array_type, array_length_field, index_reg) do { \
973 		if (!(cfg->opt & MONO_OPT_UNSAFE)) {							\
974 		if (!(cfg->opt & MONO_OPT_ABCREM)) {							\
975 			MONO_EMIT_NULL_CHECK (cfg, array_reg);						\
976 			if (COMPILE_LLVM (cfg)) \
977 				MONO_EMIT_DEFAULT_BOUNDS_CHECK ((cfg), (array_reg), MONO_STRUCT_OFFSET (array_type, array_length_field), (index_reg), TRUE); \
978 			else \
979 				MONO_ARCH_EMIT_BOUNDS_CHECK ((cfg), (array_reg), MONO_STRUCT_OFFSET (array_type, array_length_field), (index_reg)); \
980 		} else {														\
981 			MonoInst *ins;												\
982 			MONO_INST_NEW ((cfg), ins, OP_BOUNDS_CHECK);				\
983 			ins->sreg1 = array_reg;										\
984 			ins->sreg2 = index_reg;										\
985 			ins->inst_imm = MONO_STRUCT_OFFSET (array_type, array_length_field); \
986 			ins->flags |= MONO_INST_FAULT; \
987 			MONO_ADD_INS ((cfg)->cbb, ins);								\
988 			(cfg)->flags |= MONO_CFG_HAS_ARRAY_ACCESS;					\
989 			(cfg)->cbb->has_array_access = TRUE;						\
990 		}																\
991 		}																\
992     } while (0)
993 
994 G_END_DECLS
995 
996 #endif
997