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[clang][Driver] Support simplified triple versions for config files (#111387)
[llvm-project.git] / llvm / lib / ExecutionEngine / Interpreter / Execution.cpp
blob2d69edef878e657149dfc247b6daaa018a867d62
1 //===-- Execution.cpp - Implement code to simulate the program ------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file contains the actual instruction interpreter.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "Interpreter.h"
14 #include "llvm/ADT/APInt.h"
15 #include "llvm/ADT/Statistic.h"
16 #include "llvm/CodeGen/IntrinsicLowering.h"
17 #include "llvm/IR/Constants.h"
18 #include "llvm/IR/DerivedTypes.h"
19 #include "llvm/IR/GetElementPtrTypeIterator.h"
20 #include "llvm/IR/Instructions.h"
21 #include "llvm/Support/CommandLine.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/MathExtras.h"
25 #include "llvm/Support/raw_ostream.h"
26 #include <algorithm>
27 #include <cmath>
28 using namespace llvm;
29
30 #define DEBUG_TYPE "interpreter"
31
32 STATISTIC(NumDynamicInsts, "Number of dynamic instructions executed");
33
34 static cl::opt<bool> PrintVolatile("interpreter-print-volatile", cl::Hidden,
35 cl::desc("make the interpreter print every volatile load and store"));
36
37 //===----------------------------------------------------------------------===//
38 // Various Helper Functions
39 //===----------------------------------------------------------------------===//
40
41 static void SetValue(Value *V, GenericValue Val, ExecutionContext &SF) {
42 SF.Values[V] = Val;
43 }
44
45 //===----------------------------------------------------------------------===//
46 // Unary Instruction Implementations
47 //===----------------------------------------------------------------------===//
48
49 static void executeFNegInst(GenericValue &Dest, GenericValue Src, Type *Ty) {
50 switch (Ty->getTypeID()) {
51 case Type::FloatTyID:
52 Dest.FloatVal = -Src.FloatVal;
53 break;
54 case Type::DoubleTyID:
55 Dest.DoubleVal = -Src.DoubleVal;
56 break;
57 default:
58 llvm_unreachable("Unhandled type for FNeg instruction");
59 }
60 }
61
62 void Interpreter::visitUnaryOperator(UnaryOperator &I) {
63 ExecutionContext &SF = ECStack.back();
64 Type *Ty = I.getOperand(0)->getType();
65 GenericValue Src = getOperandValue(I.getOperand(0), SF);
66 GenericValue R; // Result
67
68 // First process vector operation
69 if (Ty->isVectorTy()) {
70 R.AggregateVal.resize(Src.AggregateVal.size());
71
72 switch(I.getOpcode()) {
73 default:
74 llvm_unreachable("Don't know how to handle this unary operator");
75 break;
76 case Instruction::FNeg:
77 if (cast<VectorType>(Ty)->getElementType()->isFloatTy()) {
78 for (unsigned i = 0; i < R.AggregateVal.size(); ++i)
79 R.AggregateVal[i].FloatVal = -Src.AggregateVal[i].FloatVal;
80 } else if (cast<VectorType>(Ty)->getElementType()->isDoubleTy()) {
81 for (unsigned i = 0; i < R.AggregateVal.size(); ++i)
82 R.AggregateVal[i].DoubleVal = -Src.AggregateVal[i].DoubleVal;
83 } else {
84 llvm_unreachable("Unhandled type for FNeg instruction");
85 }
86 break;
87 }
88 } else {
89 switch (I.getOpcode()) {
90 default:
91 llvm_unreachable("Don't know how to handle this unary operator");
92 break;
93 case Instruction::FNeg: executeFNegInst(R, Src, Ty); break;
94 }
95 }
96 SetValue(&I, R, SF);
97 }
98
99 //===----------------------------------------------------------------------===//
100 // Binary Instruction Implementations
101 //===----------------------------------------------------------------------===//
102
103 #define IMPLEMENT_BINARY_OPERATOR(OP, TY) \
104 case Type::TY##TyID: \
105 Dest.TY##Val = Src1.TY##Val OP Src2.TY##Val; \
106 break
107
108 static void executeFAddInst(GenericValue &Dest, GenericValue Src1,
109 GenericValue Src2, Type *Ty) {
110 switch (Ty->getTypeID()) {
111 IMPLEMENT_BINARY_OPERATOR(+, Float);
112 IMPLEMENT_BINARY_OPERATOR(+, Double);
113 default:
114 dbgs() << "Unhandled type for FAdd instruction: " << *Ty << "\n";
115 llvm_unreachable(nullptr);
116 }
117 }
118
119 static void executeFSubInst(GenericValue &Dest, GenericValue Src1,
120 GenericValue Src2, Type *Ty) {
121 switch (Ty->getTypeID()) {
122 IMPLEMENT_BINARY_OPERATOR(-, Float);
123 IMPLEMENT_BINARY_OPERATOR(-, Double);
124 default:
125 dbgs() << "Unhandled type for FSub instruction: " << *Ty << "\n";
126 llvm_unreachable(nullptr);
127 }
128 }
129
130 static void executeFMulInst(GenericValue &Dest, GenericValue Src1,
131 GenericValue Src2, Type *Ty) {
132 switch (Ty->getTypeID()) {
133 IMPLEMENT_BINARY_OPERATOR(*, Float);
134 IMPLEMENT_BINARY_OPERATOR(*, Double);
135 default:
136 dbgs() << "Unhandled type for FMul instruction: " << *Ty << "\n";
137 llvm_unreachable(nullptr);
138 }
139 }
140
141 static void executeFDivInst(GenericValue &Dest, GenericValue Src1,
142 GenericValue Src2, Type *Ty) {
143 switch (Ty->getTypeID()) {
144 IMPLEMENT_BINARY_OPERATOR(/, Float);
145 IMPLEMENT_BINARY_OPERATOR(/, Double);
146 default:
147 dbgs() << "Unhandled type for FDiv instruction: " << *Ty << "\n";
148 llvm_unreachable(nullptr);
149 }
150 }
151
152 static void executeFRemInst(GenericValue &Dest, GenericValue Src1,
153 GenericValue Src2, Type *Ty) {
154 switch (Ty->getTypeID()) {
155 case Type::FloatTyID:
156 Dest.FloatVal = fmod(Src1.FloatVal, Src2.FloatVal);
157 break;
158 case Type::DoubleTyID:
159 Dest.DoubleVal = fmod(Src1.DoubleVal, Src2.DoubleVal);
160 break;
161 default:
162 dbgs() << "Unhandled type for Rem instruction: " << *Ty << "\n";
163 llvm_unreachable(nullptr);
164 }
165 }
166
167 #define IMPLEMENT_INTEGER_ICMP(OP, TY) \
168 case Type::IntegerTyID: \
169 Dest.IntVal = APInt(1,Src1.IntVal.OP(Src2.IntVal)); \
170 break;
171
172 #define IMPLEMENT_VECTOR_INTEGER_ICMP(OP, TY) \
173 case Type::FixedVectorTyID: \
174 case Type::ScalableVectorTyID: { \
175 assert(Src1.AggregateVal.size() == Src2.AggregateVal.size()); \
176 Dest.AggregateVal.resize(Src1.AggregateVal.size()); \
177 for (uint32_t _i = 0; _i < Src1.AggregateVal.size(); _i++) \
178 Dest.AggregateVal[_i].IntVal = APInt( \
179 1, Src1.AggregateVal[_i].IntVal.OP(Src2.AggregateVal[_i].IntVal)); \
180 } break;
181
182 // Handle pointers specially because they must be compared with only as much
183 // width as the host has. We _do not_ want to be comparing 64 bit values when
184 // running on a 32-bit target, otherwise the upper 32 bits might mess up
185 // comparisons if they contain garbage.
186 #define IMPLEMENT_POINTER_ICMP(OP) \
187 case Type::PointerTyID: \
188 Dest.IntVal = APInt(1,(void*)(intptr_t)Src1.PointerVal OP \
189 (void*)(intptr_t)Src2.PointerVal); \
190 break;
191
192 static GenericValue executeICMP_EQ(GenericValue Src1, GenericValue Src2,
193 Type *Ty) {
194 GenericValue Dest;
195 switch (Ty->getTypeID()) {
196 IMPLEMENT_INTEGER_ICMP(eq,Ty);
197 IMPLEMENT_VECTOR_INTEGER_ICMP(eq,Ty);
198 IMPLEMENT_POINTER_ICMP(==);
199 default:
200 dbgs() << "Unhandled type for ICMP_EQ predicate: " << *Ty << "\n";
201 llvm_unreachable(nullptr);
202 }
203 return Dest;
204 }
205
206 static GenericValue executeICMP_NE(GenericValue Src1, GenericValue Src2,
207 Type *Ty) {
208 GenericValue Dest;
209 switch (Ty->getTypeID()) {
210 IMPLEMENT_INTEGER_ICMP(ne,Ty);
211 IMPLEMENT_VECTOR_INTEGER_ICMP(ne,Ty);
212 IMPLEMENT_POINTER_ICMP(!=);
213 default:
214 dbgs() << "Unhandled type for ICMP_NE predicate: " << *Ty << "\n";
215 llvm_unreachable(nullptr);
216 }
217 return Dest;
218 }
219
220 static GenericValue executeICMP_ULT(GenericValue Src1, GenericValue Src2,
221 Type *Ty) {
222 GenericValue Dest;
223 switch (Ty->getTypeID()) {
224 IMPLEMENT_INTEGER_ICMP(ult,Ty);
225 IMPLEMENT_VECTOR_INTEGER_ICMP(ult,Ty);
226 IMPLEMENT_POINTER_ICMP(<);
227 default:
228 dbgs() << "Unhandled type for ICMP_ULT predicate: " << *Ty << "\n";
229 llvm_unreachable(nullptr);
230 }
231 return Dest;
232 }
233
234 static GenericValue executeICMP_SLT(GenericValue Src1, GenericValue Src2,
235 Type *Ty) {
236 GenericValue Dest;
237 switch (Ty->getTypeID()) {
238 IMPLEMENT_INTEGER_ICMP(slt,Ty);
239 IMPLEMENT_VECTOR_INTEGER_ICMP(slt,Ty);
240 IMPLEMENT_POINTER_ICMP(<);
241 default:
242 dbgs() << "Unhandled type for ICMP_SLT predicate: " << *Ty << "\n";
243 llvm_unreachable(nullptr);
244 }
245 return Dest;
246 }
247
248 static GenericValue executeICMP_UGT(GenericValue Src1, GenericValue Src2,
249 Type *Ty) {
250 GenericValue Dest;
251 switch (Ty->getTypeID()) {
252 IMPLEMENT_INTEGER_ICMP(ugt,Ty);
253 IMPLEMENT_VECTOR_INTEGER_ICMP(ugt,Ty);
254 IMPLEMENT_POINTER_ICMP(>);
255 default:
256 dbgs() << "Unhandled type for ICMP_UGT predicate: " << *Ty << "\n";
257 llvm_unreachable(nullptr);
258 }
259 return Dest;
260 }
261
262 static GenericValue executeICMP_SGT(GenericValue Src1, GenericValue Src2,
263 Type *Ty) {
264 GenericValue Dest;
265 switch (Ty->getTypeID()) {
266 IMPLEMENT_INTEGER_ICMP(sgt,Ty);
267 IMPLEMENT_VECTOR_INTEGER_ICMP(sgt,Ty);
268 IMPLEMENT_POINTER_ICMP(>);
269 default:
270 dbgs() << "Unhandled type for ICMP_SGT predicate: " << *Ty << "\n";
271 llvm_unreachable(nullptr);
272 }
273 return Dest;
274 }
275
276 static GenericValue executeICMP_ULE(GenericValue Src1, GenericValue Src2,
277 Type *Ty) {
278 GenericValue Dest;
279 switch (Ty->getTypeID()) {
280 IMPLEMENT_INTEGER_ICMP(ule,Ty);
281 IMPLEMENT_VECTOR_INTEGER_ICMP(ule,Ty);
282 IMPLEMENT_POINTER_ICMP(<=);
283 default:
284 dbgs() << "Unhandled type for ICMP_ULE predicate: " << *Ty << "\n";
285 llvm_unreachable(nullptr);
286 }
287 return Dest;
288 }
289
290 static GenericValue executeICMP_SLE(GenericValue Src1, GenericValue Src2,
291 Type *Ty) {
292 GenericValue Dest;
293 switch (Ty->getTypeID()) {
294 IMPLEMENT_INTEGER_ICMP(sle,Ty);
295 IMPLEMENT_VECTOR_INTEGER_ICMP(sle,Ty);
296 IMPLEMENT_POINTER_ICMP(<=);
297 default:
298 dbgs() << "Unhandled type for ICMP_SLE predicate: " << *Ty << "\n";
299 llvm_unreachable(nullptr);
300 }
301 return Dest;
302 }
303
304 static GenericValue executeICMP_UGE(GenericValue Src1, GenericValue Src2,
305 Type *Ty) {
306 GenericValue Dest;
307 switch (Ty->getTypeID()) {
308 IMPLEMENT_INTEGER_ICMP(uge,Ty);
309 IMPLEMENT_VECTOR_INTEGER_ICMP(uge,Ty);
310 IMPLEMENT_POINTER_ICMP(>=);
311 default:
312 dbgs() << "Unhandled type for ICMP_UGE predicate: " << *Ty << "\n";
313 llvm_unreachable(nullptr);
314 }
315 return Dest;
316 }
317
318 static GenericValue executeICMP_SGE(GenericValue Src1, GenericValue Src2,
319 Type *Ty) {
320 GenericValue Dest;
321 switch (Ty->getTypeID()) {
322 IMPLEMENT_INTEGER_ICMP(sge,Ty);
323 IMPLEMENT_VECTOR_INTEGER_ICMP(sge,Ty);
324 IMPLEMENT_POINTER_ICMP(>=);
325 default:
326 dbgs() << "Unhandled type for ICMP_SGE predicate: " << *Ty << "\n";
327 llvm_unreachable(nullptr);
328 }
329 return Dest;
330 }
331
332 void Interpreter::visitICmpInst(ICmpInst &I) {
333 ExecutionContext &SF = ECStack.back();
334 Type *Ty = I.getOperand(0)->getType();
335 GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
336 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
337 GenericValue R; // Result
338
339 switch (I.getPredicate()) {
340 case ICmpInst::ICMP_EQ: R = executeICMP_EQ(Src1, Src2, Ty); break;
341 case ICmpInst::ICMP_NE: R = executeICMP_NE(Src1, Src2, Ty); break;
342 case ICmpInst::ICMP_ULT: R = executeICMP_ULT(Src1, Src2, Ty); break;
343 case ICmpInst::ICMP_SLT: R = executeICMP_SLT(Src1, Src2, Ty); break;
344 case ICmpInst::ICMP_UGT: R = executeICMP_UGT(Src1, Src2, Ty); break;
345 case ICmpInst::ICMP_SGT: R = executeICMP_SGT(Src1, Src2, Ty); break;
346 case ICmpInst::ICMP_ULE: R = executeICMP_ULE(Src1, Src2, Ty); break;
347 case ICmpInst::ICMP_SLE: R = executeICMP_SLE(Src1, Src2, Ty); break;
348 case ICmpInst::ICMP_UGE: R = executeICMP_UGE(Src1, Src2, Ty); break;
349 case ICmpInst::ICMP_SGE: R = executeICMP_SGE(Src1, Src2, Ty); break;
350 default:
351 dbgs() << "Don't know how to handle this ICmp predicate!\n-->" << I;
352 llvm_unreachable(nullptr);
353 }
354
355 SetValue(&I, R, SF);
356 }
357
358 #define IMPLEMENT_FCMP(OP, TY) \
359 case Type::TY##TyID: \
360 Dest.IntVal = APInt(1,Src1.TY##Val OP Src2.TY##Val); \
361 break
362
363 #define IMPLEMENT_VECTOR_FCMP_T(OP, TY) \
364 assert(Src1.AggregateVal.size() == Src2.AggregateVal.size()); \
365 Dest.AggregateVal.resize( Src1.AggregateVal.size() ); \
366 for( uint32_t _i=0;_i<Src1.AggregateVal.size();_i++) \
367 Dest.AggregateVal[_i].IntVal = APInt(1, \
368 Src1.AggregateVal[_i].TY##Val OP Src2.AggregateVal[_i].TY##Val);\
369 break;
370
371 #define IMPLEMENT_VECTOR_FCMP(OP) \
372 case Type::FixedVectorTyID: \
373 case Type::ScalableVectorTyID: \
374 if (cast<VectorType>(Ty)->getElementType()->isFloatTy()) { \
375 IMPLEMENT_VECTOR_FCMP_T(OP, Float); \
376 } else { \
377 IMPLEMENT_VECTOR_FCMP_T(OP, Double); \
378 }
379
380 static GenericValue executeFCMP_OEQ(GenericValue Src1, GenericValue Src2,
381 Type *Ty) {
382 GenericValue Dest;
383 switch (Ty->getTypeID()) {
384 IMPLEMENT_FCMP(==, Float);
385 IMPLEMENT_FCMP(==, Double);
386 IMPLEMENT_VECTOR_FCMP(==);
387 default:
388 dbgs() << "Unhandled type for FCmp EQ instruction: " << *Ty << "\n";
389 llvm_unreachable(nullptr);
390 }
391 return Dest;
392 }
393
394 #define IMPLEMENT_SCALAR_NANS(TY, X,Y) \
395 if (TY->isFloatTy()) { \
396 if (X.FloatVal != X.FloatVal || Y.FloatVal != Y.FloatVal) { \
397 Dest.IntVal = APInt(1,false); \
398 return Dest; \
399 } \
400 } else { \
401 if (X.DoubleVal != X.DoubleVal || Y.DoubleVal != Y.DoubleVal) { \
402 Dest.IntVal = APInt(1,false); \
403 return Dest; \
404 } \
405 }
406
407 #define MASK_VECTOR_NANS_T(X,Y, TZ, FLAG) \
408 assert(X.AggregateVal.size() == Y.AggregateVal.size()); \
409 Dest.AggregateVal.resize( X.AggregateVal.size() ); \
410 for( uint32_t _i=0;_i<X.AggregateVal.size();_i++) { \
411 if (X.AggregateVal[_i].TZ##Val != X.AggregateVal[_i].TZ##Val || \
412 Y.AggregateVal[_i].TZ##Val != Y.AggregateVal[_i].TZ##Val) \
413 Dest.AggregateVal[_i].IntVal = APInt(1,FLAG); \
414 else { \
415 Dest.AggregateVal[_i].IntVal = APInt(1,!FLAG); \
416 } \
417 }
418
419 #define MASK_VECTOR_NANS(TY, X,Y, FLAG) \
420 if (TY->isVectorTy()) { \
421 if (cast<VectorType>(TY)->getElementType()->isFloatTy()) { \
422 MASK_VECTOR_NANS_T(X, Y, Float, FLAG) \
423 } else { \
424 MASK_VECTOR_NANS_T(X, Y, Double, FLAG) \
425 } \
426 } \
427
428
429
430 static GenericValue executeFCMP_ONE(GenericValue Src1, GenericValue Src2,
431 Type *Ty)
432 {
433 GenericValue Dest;
434 // if input is scalar value and Src1 or Src2 is NaN return false
435 IMPLEMENT_SCALAR_NANS(Ty, Src1, Src2)
436 // if vector input detect NaNs and fill mask
437 MASK_VECTOR_NANS(Ty, Src1, Src2, false)
438 GenericValue DestMask = Dest;
439 switch (Ty->getTypeID()) {
440 IMPLEMENT_FCMP(!=, Float);
441 IMPLEMENT_FCMP(!=, Double);
442 IMPLEMENT_VECTOR_FCMP(!=);
443 default:
444 dbgs() << "Unhandled type for FCmp NE instruction: " << *Ty << "\n";
445 llvm_unreachable(nullptr);
446 }
447 // in vector case mask out NaN elements
448 if (Ty->isVectorTy())
449 for( size_t _i=0; _i<Src1.AggregateVal.size(); _i++)
450 if (DestMask.AggregateVal[_i].IntVal == false)
451 Dest.AggregateVal[_i].IntVal = APInt(1,false);
452
453 return Dest;
454 }
455
456 static GenericValue executeFCMP_OLE(GenericValue Src1, GenericValue Src2,
457 Type *Ty) {
458 GenericValue Dest;
459 switch (Ty->getTypeID()) {
460 IMPLEMENT_FCMP(<=, Float);
461 IMPLEMENT_FCMP(<=, Double);
462 IMPLEMENT_VECTOR_FCMP(<=);
463 default:
464 dbgs() << "Unhandled type for FCmp LE instruction: " << *Ty << "\n";
465 llvm_unreachable(nullptr);
466 }
467 return Dest;
468 }
469
470 static GenericValue executeFCMP_OGE(GenericValue Src1, GenericValue Src2,
471 Type *Ty) {
472 GenericValue Dest;
473 switch (Ty->getTypeID()) {
474 IMPLEMENT_FCMP(>=, Float);
475 IMPLEMENT_FCMP(>=, Double);
476 IMPLEMENT_VECTOR_FCMP(>=);
477 default:
478 dbgs() << "Unhandled type for FCmp GE instruction: " << *Ty << "\n";
479 llvm_unreachable(nullptr);
480 }
481 return Dest;
482 }
483
484 static GenericValue executeFCMP_OLT(GenericValue Src1, GenericValue Src2,
485 Type *Ty) {
486 GenericValue Dest;
487 switch (Ty->getTypeID()) {
488 IMPLEMENT_FCMP(<, Float);
489 IMPLEMENT_FCMP(<, Double);
490 IMPLEMENT_VECTOR_FCMP(<);
491 default:
492 dbgs() << "Unhandled type for FCmp LT instruction: " << *Ty << "\n";
493 llvm_unreachable(nullptr);
494 }
495 return Dest;
496 }
497
498 static GenericValue executeFCMP_OGT(GenericValue Src1, GenericValue Src2,
499 Type *Ty) {
500 GenericValue Dest;
501 switch (Ty->getTypeID()) {
502 IMPLEMENT_FCMP(>, Float);
503 IMPLEMENT_FCMP(>, Double);
504 IMPLEMENT_VECTOR_FCMP(>);
505 default:
506 dbgs() << "Unhandled type for FCmp GT instruction: " << *Ty << "\n";
507 llvm_unreachable(nullptr);
508 }
509 return Dest;
510 }
511
512 #define IMPLEMENT_UNORDERED(TY, X,Y) \
513 if (TY->isFloatTy()) { \
514 if (X.FloatVal != X.FloatVal || Y.FloatVal != Y.FloatVal) { \
515 Dest.IntVal = APInt(1,true); \
516 return Dest; \
517 } \
518 } else if (X.DoubleVal != X.DoubleVal || Y.DoubleVal != Y.DoubleVal) { \
519 Dest.IntVal = APInt(1,true); \
520 return Dest; \
521 }
522
523 #define IMPLEMENT_VECTOR_UNORDERED(TY, X, Y, FUNC) \
524 if (TY->isVectorTy()) { \
525 GenericValue DestMask = Dest; \
526 Dest = FUNC(Src1, Src2, Ty); \
527 for (size_t _i = 0; _i < Src1.AggregateVal.size(); _i++) \
528 if (DestMask.AggregateVal[_i].IntVal == true) \
529 Dest.AggregateVal[_i].IntVal = APInt(1, true); \
530 return Dest; \
531 }
532
533 static GenericValue executeFCMP_UEQ(GenericValue Src1, GenericValue Src2,
534 Type *Ty) {
535 GenericValue Dest;
536 IMPLEMENT_UNORDERED(Ty, Src1, Src2)
537 MASK_VECTOR_NANS(Ty, Src1, Src2, true)
538 IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_OEQ)
539 return executeFCMP_OEQ(Src1, Src2, Ty);
540
541 }
542
543 static GenericValue executeFCMP_UNE(GenericValue Src1, GenericValue Src2,
544 Type *Ty) {
545 GenericValue Dest;
546 IMPLEMENT_UNORDERED(Ty, Src1, Src2)
547 MASK_VECTOR_NANS(Ty, Src1, Src2, true)
548 IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_ONE)
549 return executeFCMP_ONE(Src1, Src2, Ty);
550 }
551
552 static GenericValue executeFCMP_ULE(GenericValue Src1, GenericValue Src2,
553 Type *Ty) {
554 GenericValue Dest;
555 IMPLEMENT_UNORDERED(Ty, Src1, Src2)
556 MASK_VECTOR_NANS(Ty, Src1, Src2, true)
557 IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_OLE)
558 return executeFCMP_OLE(Src1, Src2, Ty);
559 }
560
561 static GenericValue executeFCMP_UGE(GenericValue Src1, GenericValue Src2,
562 Type *Ty) {
563 GenericValue Dest;
564 IMPLEMENT_UNORDERED(Ty, Src1, Src2)
565 MASK_VECTOR_NANS(Ty, Src1, Src2, true)
566 IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_OGE)
567 return executeFCMP_OGE(Src1, Src2, Ty);
568 }
569
570 static GenericValue executeFCMP_ULT(GenericValue Src1, GenericValue Src2,
571 Type *Ty) {
572 GenericValue Dest;
573 IMPLEMENT_UNORDERED(Ty, Src1, Src2)
574 MASK_VECTOR_NANS(Ty, Src1, Src2, true)
575 IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_OLT)
576 return executeFCMP_OLT(Src1, Src2, Ty);
577 }
578
579 static GenericValue executeFCMP_UGT(GenericValue Src1, GenericValue Src2,
580 Type *Ty) {
581 GenericValue Dest;
582 IMPLEMENT_UNORDERED(Ty, Src1, Src2)
583 MASK_VECTOR_NANS(Ty, Src1, Src2, true)
584 IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_OGT)
585 return executeFCMP_OGT(Src1, Src2, Ty);
586 }
587
588 static GenericValue executeFCMP_ORD(GenericValue Src1, GenericValue Src2,
589 Type *Ty) {
590 GenericValue Dest;
591 if(Ty->isVectorTy()) {
592 assert(Src1.AggregateVal.size() == Src2.AggregateVal.size());
593 Dest.AggregateVal.resize( Src1.AggregateVal.size() );
594 if (cast<VectorType>(Ty)->getElementType()->isFloatTy()) {
595 for( size_t _i=0;_i<Src1.AggregateVal.size();_i++)
596 Dest.AggregateVal[_i].IntVal = APInt(1,
597 ( (Src1.AggregateVal[_i].FloatVal ==
598 Src1.AggregateVal[_i].FloatVal) &&
599 (Src2.AggregateVal[_i].FloatVal ==
600 Src2.AggregateVal[_i].FloatVal)));
601 } else {
602 for( size_t _i=0;_i<Src1.AggregateVal.size();_i++)
603 Dest.AggregateVal[_i].IntVal = APInt(1,
604 ( (Src1.AggregateVal[_i].DoubleVal ==
605 Src1.AggregateVal[_i].DoubleVal) &&
606 (Src2.AggregateVal[_i].DoubleVal ==
607 Src2.AggregateVal[_i].DoubleVal)));
608 }
609 } else if (Ty->isFloatTy())
610 Dest.IntVal = APInt(1,(Src1.FloatVal == Src1.FloatVal &&
611 Src2.FloatVal == Src2.FloatVal));
612 else {
613 Dest.IntVal = APInt(1,(Src1.DoubleVal == Src1.DoubleVal &&
614 Src2.DoubleVal == Src2.DoubleVal));
615 }
616 return Dest;
617 }
618
619 static GenericValue executeFCMP_UNO(GenericValue Src1, GenericValue Src2,
620 Type *Ty) {
621 GenericValue Dest;
622 if(Ty->isVectorTy()) {
623 assert(Src1.AggregateVal.size() == Src2.AggregateVal.size());
624 Dest.AggregateVal.resize( Src1.AggregateVal.size() );
625 if (cast<VectorType>(Ty)->getElementType()->isFloatTy()) {
626 for( size_t _i=0;_i<Src1.AggregateVal.size();_i++)
627 Dest.AggregateVal[_i].IntVal = APInt(1,
628 ( (Src1.AggregateVal[_i].FloatVal !=
629 Src1.AggregateVal[_i].FloatVal) ||
630 (Src2.AggregateVal[_i].FloatVal !=
631 Src2.AggregateVal[_i].FloatVal)));
632 } else {
633 for( size_t _i=0;_i<Src1.AggregateVal.size();_i++)
634 Dest.AggregateVal[_i].IntVal = APInt(1,
635 ( (Src1.AggregateVal[_i].DoubleVal !=
636 Src1.AggregateVal[_i].DoubleVal) ||
637 (Src2.AggregateVal[_i].DoubleVal !=
638 Src2.AggregateVal[_i].DoubleVal)));
639 }
640 } else if (Ty->isFloatTy())
641 Dest.IntVal = APInt(1,(Src1.FloatVal != Src1.FloatVal ||
642 Src2.FloatVal != Src2.FloatVal));
643 else {
644 Dest.IntVal = APInt(1,(Src1.DoubleVal != Src1.DoubleVal ||
645 Src2.DoubleVal != Src2.DoubleVal));
646 }
647 return Dest;
648 }
649
650 static GenericValue executeFCMP_BOOL(GenericValue Src1, GenericValue Src2,
651 Type *Ty, const bool val) {
652 GenericValue Dest;
653 if(Ty->isVectorTy()) {
654 assert(Src1.AggregateVal.size() == Src2.AggregateVal.size());
655 Dest.AggregateVal.resize( Src1.AggregateVal.size() );
656 for( size_t _i=0; _i<Src1.AggregateVal.size(); _i++)
657 Dest.AggregateVal[_i].IntVal = APInt(1,val);
658 } else {
659 Dest.IntVal = APInt(1, val);
660 }
661
662 return Dest;
663 }
664
665 void Interpreter::visitFCmpInst(FCmpInst &I) {
666 ExecutionContext &SF = ECStack.back();
667 Type *Ty = I.getOperand(0)->getType();
668 GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
669 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
670 GenericValue R; // Result
671
672 switch (I.getPredicate()) {
673 default:
674 dbgs() << "Don't know how to handle this FCmp predicate!\n-->" << I;
675 llvm_unreachable(nullptr);
676 break;
677 case FCmpInst::FCMP_FALSE: R = executeFCMP_BOOL(Src1, Src2, Ty, false);
678 break;
679 case FCmpInst::FCMP_TRUE: R = executeFCMP_BOOL(Src1, Src2, Ty, true);
680 break;
681 case FCmpInst::FCMP_ORD: R = executeFCMP_ORD(Src1, Src2, Ty); break;
682 case FCmpInst::FCMP_UNO: R = executeFCMP_UNO(Src1, Src2, Ty); break;
683 case FCmpInst::FCMP_UEQ: R = executeFCMP_UEQ(Src1, Src2, Ty); break;
684 case FCmpInst::FCMP_OEQ: R = executeFCMP_OEQ(Src1, Src2, Ty); break;
685 case FCmpInst::FCMP_UNE: R = executeFCMP_UNE(Src1, Src2, Ty); break;
686 case FCmpInst::FCMP_ONE: R = executeFCMP_ONE(Src1, Src2, Ty); break;
687 case FCmpInst::FCMP_ULT: R = executeFCMP_ULT(Src1, Src2, Ty); break;
688 case FCmpInst::FCMP_OLT: R = executeFCMP_OLT(Src1, Src2, Ty); break;
689 case FCmpInst::FCMP_UGT: R = executeFCMP_UGT(Src1, Src2, Ty); break;
690 case FCmpInst::FCMP_OGT: R = executeFCMP_OGT(Src1, Src2, Ty); break;
691 case FCmpInst::FCMP_ULE: R = executeFCMP_ULE(Src1, Src2, Ty); break;
692 case FCmpInst::FCMP_OLE: R = executeFCMP_OLE(Src1, Src2, Ty); break;
693 case FCmpInst::FCMP_UGE: R = executeFCMP_UGE(Src1, Src2, Ty); break;
694 case FCmpInst::FCMP_OGE: R = executeFCMP_OGE(Src1, Src2, Ty); break;
695 }
696
697 SetValue(&I, R, SF);
698 }
699
700 void Interpreter::visitBinaryOperator(BinaryOperator &I) {
701 ExecutionContext &SF = ECStack.back();
702 Type *Ty = I.getOperand(0)->getType();
703 GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
704 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
705 GenericValue R; // Result
706
707 // First process vector operation
708 if (Ty->isVectorTy()) {
709 assert(Src1.AggregateVal.size() == Src2.AggregateVal.size());
710 R.AggregateVal.resize(Src1.AggregateVal.size());
711
712 // Macros to execute binary operation 'OP' over integer vectors
713 #define INTEGER_VECTOR_OPERATION(OP) \
714 for (unsigned i = 0; i < R.AggregateVal.size(); ++i) \
715 R.AggregateVal[i].IntVal = \
716 Src1.AggregateVal[i].IntVal OP Src2.AggregateVal[i].IntVal;
717
718 // Additional macros to execute binary operations udiv/sdiv/urem/srem since
719 // they have different notation.
720 #define INTEGER_VECTOR_FUNCTION(OP) \
721 for (unsigned i = 0; i < R.AggregateVal.size(); ++i) \
722 R.AggregateVal[i].IntVal = \
723 Src1.AggregateVal[i].IntVal.OP(Src2.AggregateVal[i].IntVal);
724
725 // Macros to execute binary operation 'OP' over floating point type TY
726 // (float or double) vectors
727 #define FLOAT_VECTOR_FUNCTION(OP, TY) \
728 for (unsigned i = 0; i < R.AggregateVal.size(); ++i) \
729 R.AggregateVal[i].TY = \
730 Src1.AggregateVal[i].TY OP Src2.AggregateVal[i].TY;
731
732 // Macros to choose appropriate TY: float or double and run operation
733 // execution
734 #define FLOAT_VECTOR_OP(OP) { \
735 if (cast<VectorType>(Ty)->getElementType()->isFloatTy()) \
736 FLOAT_VECTOR_FUNCTION(OP, FloatVal) \
737 else { \
738 if (cast<VectorType>(Ty)->getElementType()->isDoubleTy()) \
739 FLOAT_VECTOR_FUNCTION(OP, DoubleVal) \
740 else { \
741 dbgs() << "Unhandled type for OP instruction: " << *Ty << "\n"; \
742 llvm_unreachable(0); \
743 } \
744 } \
745 }
746
747 switch(I.getOpcode()){
748 default:
749 dbgs() << "Don't know how to handle this binary operator!\n-->" << I;
750 llvm_unreachable(nullptr);
751 break;
752 case Instruction::Add: INTEGER_VECTOR_OPERATION(+) break;
753 case Instruction::Sub: INTEGER_VECTOR_OPERATION(-) break;
754 case Instruction::Mul: INTEGER_VECTOR_OPERATION(*) break;
755 case Instruction::UDiv: INTEGER_VECTOR_FUNCTION(udiv) break;
756 case Instruction::SDiv: INTEGER_VECTOR_FUNCTION(sdiv) break;
757 case Instruction::URem: INTEGER_VECTOR_FUNCTION(urem) break;
758 case Instruction::SRem: INTEGER_VECTOR_FUNCTION(srem) break;
759 case Instruction::And: INTEGER_VECTOR_OPERATION(&) break;
760 case Instruction::Or: INTEGER_VECTOR_OPERATION(|) break;
761 case Instruction::Xor: INTEGER_VECTOR_OPERATION(^) break;
762 case Instruction::FAdd: FLOAT_VECTOR_OP(+) break;
763 case Instruction::FSub: FLOAT_VECTOR_OP(-) break;
764 case Instruction::FMul: FLOAT_VECTOR_OP(*) break;
765 case Instruction::FDiv: FLOAT_VECTOR_OP(/) break;
766 case Instruction::FRem:
767 if (cast<VectorType>(Ty)->getElementType()->isFloatTy())
768 for (unsigned i = 0; i < R.AggregateVal.size(); ++i)
769 R.AggregateVal[i].FloatVal =
770 fmod(Src1.AggregateVal[i].FloatVal, Src2.AggregateVal[i].FloatVal);
771 else {
772 if (cast<VectorType>(Ty)->getElementType()->isDoubleTy())
773 for (unsigned i = 0; i < R.AggregateVal.size(); ++i)
774 R.AggregateVal[i].DoubleVal =
775 fmod(Src1.AggregateVal[i].DoubleVal, Src2.AggregateVal[i].DoubleVal);
776 else {
777 dbgs() << "Unhandled type for Rem instruction: " << *Ty << "\n";
778 llvm_unreachable(nullptr);
779 }
780 }
781 break;
782 }
783 } else {
784 switch (I.getOpcode()) {
785 default:
786 dbgs() << "Don't know how to handle this binary operator!\n-->" << I;
787 llvm_unreachable(nullptr);
788 break;
789 case Instruction::Add: R.IntVal = Src1.IntVal + Src2.IntVal; break;
790 case Instruction::Sub: R.IntVal = Src1.IntVal - Src2.IntVal; break;
791 case Instruction::Mul: R.IntVal = Src1.IntVal * Src2.IntVal; break;
792 case Instruction::FAdd: executeFAddInst(R, Src1, Src2, Ty); break;
793 case Instruction::FSub: executeFSubInst(R, Src1, Src2, Ty); break;
794 case Instruction::FMul: executeFMulInst(R, Src1, Src2, Ty); break;
795 case Instruction::FDiv: executeFDivInst(R, Src1, Src2, Ty); break;
796 case Instruction::FRem: executeFRemInst(R, Src1, Src2, Ty); break;
797 case Instruction::UDiv: R.IntVal = Src1.IntVal.udiv(Src2.IntVal); break;
798 case Instruction::SDiv: R.IntVal = Src1.IntVal.sdiv(Src2.IntVal); break;
799 case Instruction::URem: R.IntVal = Src1.IntVal.urem(Src2.IntVal); break;
800 case Instruction::SRem: R.IntVal = Src1.IntVal.srem(Src2.IntVal); break;
801 case Instruction::And: R.IntVal = Src1.IntVal & Src2.IntVal; break;
802 case Instruction::Or: R.IntVal = Src1.IntVal | Src2.IntVal; break;
803 case Instruction::Xor: R.IntVal = Src1.IntVal ^ Src2.IntVal; break;
804 }
805 }
806 SetValue(&I, R, SF);
807 }
808
809 static GenericValue executeSelectInst(GenericValue Src1, GenericValue Src2,
810 GenericValue Src3, Type *Ty) {
811 GenericValue Dest;
812 if(Ty->isVectorTy()) {
813 assert(Src1.AggregateVal.size() == Src2.AggregateVal.size());
814 assert(Src2.AggregateVal.size() == Src3.AggregateVal.size());
815 Dest.AggregateVal.resize( Src1.AggregateVal.size() );
816 for (size_t i = 0; i < Src1.AggregateVal.size(); ++i)
817 Dest.AggregateVal[i] = (Src1.AggregateVal[i].IntVal == 0) ?
818 Src3.AggregateVal[i] : Src2.AggregateVal[i];
819 } else {
820 Dest = (Src1.IntVal == 0) ? Src3 : Src2;
821 }
822 return Dest;
823 }
824
825 void Interpreter::visitSelectInst(SelectInst &I) {
826 ExecutionContext &SF = ECStack.back();
827 Type * Ty = I.getOperand(0)->getType();
828 GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
829 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
830 GenericValue Src3 = getOperandValue(I.getOperand(2), SF);
831 GenericValue R = executeSelectInst(Src1, Src2, Src3, Ty);
832 SetValue(&I, R, SF);
833 }
834
835 //===----------------------------------------------------------------------===//
836 // Terminator Instruction Implementations
837 //===----------------------------------------------------------------------===//
838
839 void Interpreter::exitCalled(GenericValue GV) {
840 // runAtExitHandlers() assumes there are no stack frames, but
841 // if exit() was called, then it had a stack frame. Blow away
842 // the stack before interpreting atexit handlers.
843 ECStack.clear();
844 runAtExitHandlers();
845 exit(GV.IntVal.zextOrTrunc(32).getZExtValue());
846 }
847
848 /// Pop the last stack frame off of ECStack and then copy the result
849 /// back into the result variable if we are not returning void. The
850 /// result variable may be the ExitValue, or the Value of the calling
851 /// CallInst if there was a previous stack frame. This method may
852 /// invalidate any ECStack iterators you have. This method also takes
853 /// care of switching to the normal destination BB, if we are returning
854 /// from an invoke.
855 ///
856 void Interpreter::popStackAndReturnValueToCaller(Type *RetTy,
857 GenericValue Result) {
858 // Pop the current stack frame.
859 ECStack.pop_back();
860
861 if (ECStack.empty()) { // Finished main. Put result into exit code...
862 if (RetTy && !RetTy->isVoidTy()) { // Nonvoid return type?
863 ExitValue = Result; // Capture the exit value of the program
864 } else {
865 memset(&ExitValue.Untyped, 0, sizeof(ExitValue.Untyped));
866 }
867 } else {
868 // If we have a previous stack frame, and we have a previous call,
869 // fill in the return value...
870 ExecutionContext &CallingSF = ECStack.back();
871 if (CallingSF.Caller) {
872 // Save result...
873 if (!CallingSF.Caller->getType()->isVoidTy())
874 SetValue(CallingSF.Caller, Result, CallingSF);
875 if (InvokeInst *II = dyn_cast<InvokeInst>(CallingSF.Caller))
876 SwitchToNewBasicBlock (II->getNormalDest (), CallingSF);
877 CallingSF.Caller = nullptr; // We returned from the call...
878 }
879 }
880 }
881
882 void Interpreter::visitReturnInst(ReturnInst &I) {
883 ExecutionContext &SF = ECStack.back();
884 Type *RetTy = Type::getVoidTy(I.getContext());
885 GenericValue Result;
886
887 // Save away the return value... (if we are not 'ret void')
888 if (I.getNumOperands()) {
889 RetTy = I.getReturnValue()->getType();
890 Result = getOperandValue(I.getReturnValue(), SF);
891 }
892
893 popStackAndReturnValueToCaller(RetTy, Result);
894 }
895
896 void Interpreter::visitUnreachableInst(UnreachableInst &I) {
897 report_fatal_error("Program executed an 'unreachable' instruction!");
898 }
899
900 void Interpreter::visitBranchInst(BranchInst &I) {
901 ExecutionContext &SF = ECStack.back();
902 BasicBlock *Dest;
903
904 Dest = I.getSuccessor(0); // Uncond branches have a fixed dest...
905 if (!I.isUnconditional()) {
906 Value *Cond = I.getCondition();
907 if (getOperandValue(Cond, SF).IntVal == 0) // If false cond...
908 Dest = I.getSuccessor(1);
909 }
910 SwitchToNewBasicBlock(Dest, SF);
911 }
912
913 void Interpreter::visitSwitchInst(SwitchInst &I) {
914 ExecutionContext &SF = ECStack.back();
915 Value* Cond = I.getCondition();
916 Type *ElTy = Cond->getType();
917 GenericValue CondVal = getOperandValue(Cond, SF);
918
919 // Check to see if any of the cases match...
920 BasicBlock *Dest = nullptr;
921 for (auto Case : I.cases()) {
922 GenericValue CaseVal = getOperandValue(Case.getCaseValue(), SF);
923 if (executeICMP_EQ(CondVal, CaseVal, ElTy).IntVal != 0) {
924 Dest = cast<BasicBlock>(Case.getCaseSuccessor());
925 break;
926 }
927 }
928 if (!Dest) Dest = I.getDefaultDest(); // No cases matched: use default
929 SwitchToNewBasicBlock(Dest, SF);
930 }
931
932 void Interpreter::visitIndirectBrInst(IndirectBrInst &I) {
933 ExecutionContext &SF = ECStack.back();
934 void *Dest = GVTOP(getOperandValue(I.getAddress(), SF));
935 SwitchToNewBasicBlock((BasicBlock*)Dest, SF);
936 }
937
938
939 // SwitchToNewBasicBlock - This method is used to jump to a new basic block.
940 // This function handles the actual updating of block and instruction iterators
941 // as well as execution of all of the PHI nodes in the destination block.
942 //
943 // This method does this because all of the PHI nodes must be executed
944 // atomically, reading their inputs before any of the results are updated. Not
945 // doing this can cause problems if the PHI nodes depend on other PHI nodes for
946 // their inputs. If the input PHI node is updated before it is read, incorrect
947 // results can happen. Thus we use a two phase approach.
948 //
949 void Interpreter::SwitchToNewBasicBlock(BasicBlock *Dest, ExecutionContext &SF){
950 BasicBlock *PrevBB = SF.CurBB; // Remember where we came from...
951 SF.CurBB = Dest; // Update CurBB to branch destination
952 SF.CurInst = SF.CurBB->begin(); // Update new instruction ptr...
953
954 if (!isa<PHINode>(SF.CurInst)) return; // Nothing fancy to do
955
956 // Loop over all of the PHI nodes in the current block, reading their inputs.
957 std::vector<GenericValue> ResultValues;
958
959 for (; PHINode *PN = dyn_cast<PHINode>(SF.CurInst); ++SF.CurInst) {
960 // Search for the value corresponding to this previous bb...
961 int i = PN->getBasicBlockIndex(PrevBB);
962 assert(i != -1 && "PHINode doesn't contain entry for predecessor??");
963 Value *IncomingValue = PN->getIncomingValue(i);
964
965 // Save the incoming value for this PHI node...
966 ResultValues.push_back(getOperandValue(IncomingValue, SF));
967 }
968
969 // Now loop over all of the PHI nodes setting their values...
970 SF.CurInst = SF.CurBB->begin();
971 for (unsigned i = 0; isa<PHINode>(SF.CurInst); ++SF.CurInst, ++i) {
972 PHINode *PN = cast<PHINode>(SF.CurInst);
973 SetValue(PN, ResultValues[i], SF);
974 }
975 }
976
977 //===----------------------------------------------------------------------===//
978 // Memory Instruction Implementations
979 //===----------------------------------------------------------------------===//
980
981 void Interpreter::visitAllocaInst(AllocaInst &I) {
982 ExecutionContext &SF = ECStack.back();
983
984 Type *Ty = I.getAllocatedType(); // Type to be allocated
985
986 // Get the number of elements being allocated by the array...
987 unsigned NumElements =
988 getOperandValue(I.getOperand(0), SF).IntVal.getZExtValue();
989
990 unsigned TypeSize = (size_t)getDataLayout().getTypeAllocSize(Ty);
991
992 // Avoid malloc-ing zero bytes, use max()...
993 unsigned MemToAlloc = std::max(1U, NumElements * TypeSize);
994
995 // Allocate enough memory to hold the type...
996 void *Memory = safe_malloc(MemToAlloc);
997
998 LLVM_DEBUG(dbgs() << "Allocated Type: " << *Ty << " (" << TypeSize
999 << " bytes) x " << NumElements << " (Total: " << MemToAlloc
1000 << ") at " << uintptr_t(Memory) << '\n');
1001
1002 GenericValue Result = PTOGV(Memory);
1003 assert(Result.PointerVal && "Null pointer returned by malloc!");
1004 SetValue(&I, Result, SF);
1005
1006 if (I.getOpcode() == Instruction::Alloca)
1007 ECStack.back().Allocas.add(Memory);
1008 }
1009
1010 // getElementOffset - The workhorse for getelementptr.
1011 //
1012 GenericValue Interpreter::executeGEPOperation(Value *Ptr, gep_type_iterator I,
1013 gep_type_iterator E,
1014 ExecutionContext &SF) {
1015 assert(Ptr->getType()->isPointerTy() &&
1016 "Cannot getElementOffset of a nonpointer type!");
1017
1018 uint64_t Total = 0;
1019
1020 for (; I != E; ++I) {
1021 if (StructType *STy = I.getStructTypeOrNull()) {
1022 const StructLayout *SLO = getDataLayout().getStructLayout(STy);
1023
1024 const ConstantInt *CPU = cast<ConstantInt>(I.getOperand());
1025 unsigned Index = unsigned(CPU->getZExtValue());
1026
1027 Total += SLO->getElementOffset(Index);
1028 } else {
1029 // Get the index number for the array... which must be long type...
1030 GenericValue IdxGV = getOperandValue(I.getOperand(), SF);
1031
1032 int64_t Idx;
1033 unsigned BitWidth =
1034 cast<IntegerType>(I.getOperand()->getType())->getBitWidth();
1035 if (BitWidth == 32)
1036 Idx = (int64_t)(int32_t)IdxGV.IntVal.getZExtValue();
1037 else {
1038 assert(BitWidth == 64 && "Invalid index type for getelementptr");
1039 Idx = (int64_t)IdxGV.IntVal.getZExtValue();
1040 }
1041 Total += I.getSequentialElementStride(getDataLayout()) * Idx;
1042 }
1043 }
1044
1045 GenericValue Result;
1046 Result.PointerVal = ((char*)getOperandValue(Ptr, SF).PointerVal) + Total;
1047 LLVM_DEBUG(dbgs() << "GEP Index " << Total << " bytes.\n");
1048 return Result;
1049 }
1050
1051 void Interpreter::visitGetElementPtrInst(GetElementPtrInst &I) {
1052 ExecutionContext &SF = ECStack.back();
1053 SetValue(&I, executeGEPOperation(I.getPointerOperand(),
1054 gep_type_begin(I), gep_type_end(I), SF), SF);
1055 }
1056
1057 void Interpreter::visitLoadInst(LoadInst &I) {
1058 ExecutionContext &SF = ECStack.back();
1059 GenericValue SRC = getOperandValue(I.getPointerOperand(), SF);
1060 GenericValue *Ptr = (GenericValue*)GVTOP(SRC);
1061 GenericValue Result;
1062 LoadValueFromMemory(Result, Ptr, I.getType());
1063 SetValue(&I, Result, SF);
1064 if (I.isVolatile() && PrintVolatile)
1065 dbgs() << "Volatile load " << I;
1066 }
1067
1068 void Interpreter::visitStoreInst(StoreInst &I) {
1069 ExecutionContext &SF = ECStack.back();
1070 GenericValue Val = getOperandValue(I.getOperand(0), SF);
1071 GenericValue SRC = getOperandValue(I.getPointerOperand(), SF);
1072 StoreValueToMemory(Val, (GenericValue *)GVTOP(SRC),
1073 I.getOperand(0)->getType());
1074 if (I.isVolatile() && PrintVolatile)
1075 dbgs() << "Volatile store: " << I;
1076 }
1077
1078 //===----------------------------------------------------------------------===//
1079 // Miscellaneous Instruction Implementations
1080 //===----------------------------------------------------------------------===//
1081
1082 void Interpreter::visitVAStartInst(VAStartInst &I) {
1083 ExecutionContext &SF = ECStack.back();
1084 GenericValue ArgIndex;
1085 ArgIndex.UIntPairVal.first = ECStack.size() - 1;
1086 ArgIndex.UIntPairVal.second = 0;
1087 SetValue(&I, ArgIndex, SF);
1088 }
1089
1090 void Interpreter::visitVAEndInst(VAEndInst &I) {
1091 // va_end is a noop for the interpreter
1092 }
1093
1094 void Interpreter::visitVACopyInst(VACopyInst &I) {
1095 ExecutionContext &SF = ECStack.back();
1096 SetValue(&I, getOperandValue(*I.arg_begin(), SF), SF);
1097 }
1098
1099 void Interpreter::visitIntrinsicInst(IntrinsicInst &I) {
1100 ExecutionContext &SF = ECStack.back();
1101
1102 // If it is an unknown intrinsic function, use the intrinsic lowering
1103 // class to transform it into hopefully tasty LLVM code.
1104 //
1105 BasicBlock::iterator Me(&I);
1106 BasicBlock *Parent = I.getParent();
1107 bool atBegin(Parent->begin() == Me);
1108 if (!atBegin)
1109 --Me;
1110 IL->LowerIntrinsicCall(&I);
1111
1112 // Restore the CurInst pointer to the first instruction newly inserted, if
1113 // any.
1114 if (atBegin) {
1115 SF.CurInst = Parent->begin();
1116 } else {
1117 SF.CurInst = Me;
1118 ++SF.CurInst;
1119 }
1120 }
1121
1122 void Interpreter::visitCallBase(CallBase &I) {
1123 ExecutionContext &SF = ECStack.back();
1124
1125 SF.Caller = &I;
1126 std::vector<GenericValue> ArgVals;
1127 const unsigned NumArgs = SF.Caller->arg_size();
1128 ArgVals.reserve(NumArgs);
1129 for (Value *V : SF.Caller->args())
1130 ArgVals.push_back(getOperandValue(V, SF));
1131
1132 // To handle indirect calls, we must get the pointer value from the argument
1133 // and treat it as a function pointer.
1134 GenericValue SRC = getOperandValue(SF.Caller->getCalledOperand(), SF);
1135 callFunction((Function*)GVTOP(SRC), ArgVals);
1136 }
1137
1138 // auxiliary function for shift operations
1139 static unsigned getShiftAmount(uint64_t orgShiftAmount,
1140 llvm::APInt valueToShift) {
1141 unsigned valueWidth = valueToShift.getBitWidth();
1142 if (orgShiftAmount < (uint64_t)valueWidth)
1143 return orgShiftAmount;
1144 // according to the llvm documentation, if orgShiftAmount > valueWidth,
1145 // the result is undfeined. but we do shift by this rule:
1146 return (NextPowerOf2(valueWidth-1) - 1) & orgShiftAmount;
1147 }
1148
1149
1150 void Interpreter::visitShl(BinaryOperator &I) {
1151 ExecutionContext &SF = ECStack.back();
1152 GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1153 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1154 GenericValue Dest;
1155 Type *Ty = I.getType();
1156
1157 if (Ty->isVectorTy()) {
1158 uint32_t src1Size = uint32_t(Src1.AggregateVal.size());
1159 assert(src1Size == Src2.AggregateVal.size());
1160 for (unsigned i = 0; i < src1Size; i++) {
1161 GenericValue Result;
1162 uint64_t shiftAmount = Src2.AggregateVal[i].IntVal.getZExtValue();
1163 llvm::APInt valueToShift = Src1.AggregateVal[i].IntVal;
1164 Result.IntVal = valueToShift.shl(getShiftAmount(shiftAmount, valueToShift));
1165 Dest.AggregateVal.push_back(Result);
1166 }
1167 } else {
1168 // scalar
1169 uint64_t shiftAmount = Src2.IntVal.getZExtValue();
1170 llvm::APInt valueToShift = Src1.IntVal;
1171 Dest.IntVal = valueToShift.shl(getShiftAmount(shiftAmount, valueToShift));
1172 }
1173
1174 SetValue(&I, Dest, SF);
1175 }
1176
1177 void Interpreter::visitLShr(BinaryOperator &I) {
1178 ExecutionContext &SF = ECStack.back();
1179 GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1180 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1181 GenericValue Dest;
1182 Type *Ty = I.getType();
1183
1184 if (Ty->isVectorTy()) {
1185 uint32_t src1Size = uint32_t(Src1.AggregateVal.size());
1186 assert(src1Size == Src2.AggregateVal.size());
1187 for (unsigned i = 0; i < src1Size; i++) {
1188 GenericValue Result;
1189 uint64_t shiftAmount = Src2.AggregateVal[i].IntVal.getZExtValue();
1190 llvm::APInt valueToShift = Src1.AggregateVal[i].IntVal;
1191 Result.IntVal = valueToShift.lshr(getShiftAmount(shiftAmount, valueToShift));
1192 Dest.AggregateVal.push_back(Result);
1193 }
1194 } else {
1195 // scalar
1196 uint64_t shiftAmount = Src2.IntVal.getZExtValue();
1197 llvm::APInt valueToShift = Src1.IntVal;
1198 Dest.IntVal = valueToShift.lshr(getShiftAmount(shiftAmount, valueToShift));
1199 }
1200
1201 SetValue(&I, Dest, SF);
1202 }
1203
1204 void Interpreter::visitAShr(BinaryOperator &I) {
1205 ExecutionContext &SF = ECStack.back();
1206 GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1207 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1208 GenericValue Dest;
1209 Type *Ty = I.getType();
1210
1211 if (Ty->isVectorTy()) {
1212 size_t src1Size = Src1.AggregateVal.size();
1213 assert(src1Size == Src2.AggregateVal.size());
1214 for (unsigned i = 0; i < src1Size; i++) {
1215 GenericValue Result;
1216 uint64_t shiftAmount = Src2.AggregateVal[i].IntVal.getZExtValue();
1217 llvm::APInt valueToShift = Src1.AggregateVal[i].IntVal;
1218 Result.IntVal = valueToShift.ashr(getShiftAmount(shiftAmount, valueToShift));
1219 Dest.AggregateVal.push_back(Result);
1220 }
1221 } else {
1222 // scalar
1223 uint64_t shiftAmount = Src2.IntVal.getZExtValue();
1224 llvm::APInt valueToShift = Src1.IntVal;
1225 Dest.IntVal = valueToShift.ashr(getShiftAmount(shiftAmount, valueToShift));
1226 }
1227
1228 SetValue(&I, Dest, SF);
1229 }
1230
1231 GenericValue Interpreter::executeTruncInst(Value *SrcVal, Type *DstTy,
1232 ExecutionContext &SF) {
1233 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1234 Type *SrcTy = SrcVal->getType();
1235 if (SrcTy->isVectorTy()) {
1236 Type *DstVecTy = DstTy->getScalarType();
1237 unsigned DBitWidth = cast<IntegerType>(DstVecTy)->getBitWidth();
1238 unsigned NumElts = Src.AggregateVal.size();
1239 // the sizes of src and dst vectors must be equal
1240 Dest.AggregateVal.resize(NumElts);
1241 for (unsigned i = 0; i < NumElts; i++)
1242 Dest.AggregateVal[i].IntVal = Src.AggregateVal[i].IntVal.trunc(DBitWidth);
1243 } else {
1244 IntegerType *DITy = cast<IntegerType>(DstTy);
1245 unsigned DBitWidth = DITy->getBitWidth();
1246 Dest.IntVal = Src.IntVal.trunc(DBitWidth);
1247 }
1248 return Dest;
1249 }
1250
1251 GenericValue Interpreter::executeSExtInst(Value *SrcVal, Type *DstTy,
1252 ExecutionContext &SF) {
1253 Type *SrcTy = SrcVal->getType();
1254 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1255 if (SrcTy->isVectorTy()) {
1256 Type *DstVecTy = DstTy->getScalarType();
1257 unsigned DBitWidth = cast<IntegerType>(DstVecTy)->getBitWidth();
1258 unsigned size = Src.AggregateVal.size();
1259 // the sizes of src and dst vectors must be equal.
1260 Dest.AggregateVal.resize(size);
1261 for (unsigned i = 0; i < size; i++)
1262 Dest.AggregateVal[i].IntVal = Src.AggregateVal[i].IntVal.sext(DBitWidth);
1263 } else {
1264 auto *DITy = cast<IntegerType>(DstTy);
1265 unsigned DBitWidth = DITy->getBitWidth();
1266 Dest.IntVal = Src.IntVal.sext(DBitWidth);
1267 }
1268 return Dest;
1269 }
1270
1271 GenericValue Interpreter::executeZExtInst(Value *SrcVal, Type *DstTy,
1272 ExecutionContext &SF) {
1273 Type *SrcTy = SrcVal->getType();
1274 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1275 if (SrcTy->isVectorTy()) {
1276 Type *DstVecTy = DstTy->getScalarType();
1277 unsigned DBitWidth = cast<IntegerType>(DstVecTy)->getBitWidth();
1278
1279 unsigned size = Src.AggregateVal.size();
1280 // the sizes of src and dst vectors must be equal.
1281 Dest.AggregateVal.resize(size);
1282 for (unsigned i = 0; i < size; i++)
1283 Dest.AggregateVal[i].IntVal = Src.AggregateVal[i].IntVal.zext(DBitWidth);
1284 } else {
1285 auto *DITy = cast<IntegerType>(DstTy);
1286 unsigned DBitWidth = DITy->getBitWidth();
1287 Dest.IntVal = Src.IntVal.zext(DBitWidth);
1288 }
1289 return Dest;
1290 }
1291
1292 GenericValue Interpreter::executeFPTruncInst(Value *SrcVal, Type *DstTy,
1293 ExecutionContext &SF) {
1294 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1295
1296 if (isa<VectorType>(SrcVal->getType())) {
1297 assert(SrcVal->getType()->getScalarType()->isDoubleTy() &&
1298 DstTy->getScalarType()->isFloatTy() &&
1299 "Invalid FPTrunc instruction");
1300
1301 unsigned size = Src.AggregateVal.size();
1302 // the sizes of src and dst vectors must be equal.
1303 Dest.AggregateVal.resize(size);
1304 for (unsigned i = 0; i < size; i++)
1305 Dest.AggregateVal[i].FloatVal = (float)Src.AggregateVal[i].DoubleVal;
1306 } else {
1307 assert(SrcVal->getType()->isDoubleTy() && DstTy->isFloatTy() &&
1308 "Invalid FPTrunc instruction");
1309 Dest.FloatVal = (float)Src.DoubleVal;
1310 }
1311
1312 return Dest;
1313 }
1314
1315 GenericValue Interpreter::executeFPExtInst(Value *SrcVal, Type *DstTy,
1316 ExecutionContext &SF) {
1317 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1318
1319 if (isa<VectorType>(SrcVal->getType())) {
1320 assert(SrcVal->getType()->getScalarType()->isFloatTy() &&
1321 DstTy->getScalarType()->isDoubleTy() && "Invalid FPExt instruction");
1322
1323 unsigned size = Src.AggregateVal.size();
1324 // the sizes of src and dst vectors must be equal.
1325 Dest.AggregateVal.resize(size);
1326 for (unsigned i = 0; i < size; i++)
1327 Dest.AggregateVal[i].DoubleVal = (double)Src.AggregateVal[i].FloatVal;
1328 } else {
1329 assert(SrcVal->getType()->isFloatTy() && DstTy->isDoubleTy() &&
1330 "Invalid FPExt instruction");
1331 Dest.DoubleVal = (double)Src.FloatVal;
1332 }
1333
1334 return Dest;
1335 }
1336
1337 GenericValue Interpreter::executeFPToUIInst(Value *SrcVal, Type *DstTy,
1338 ExecutionContext &SF) {
1339 Type *SrcTy = SrcVal->getType();
1340 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1341
1342 if (isa<VectorType>(SrcTy)) {
1343 Type *DstVecTy = DstTy->getScalarType();
1344 Type *SrcVecTy = SrcTy->getScalarType();
1345 uint32_t DBitWidth = cast<IntegerType>(DstVecTy)->getBitWidth();
1346 unsigned size = Src.AggregateVal.size();
1347 // the sizes of src and dst vectors must be equal.
1348 Dest.AggregateVal.resize(size);
1349
1350 if (SrcVecTy->getTypeID() == Type::FloatTyID) {
1351 assert(SrcVecTy->isFloatingPointTy() && "Invalid FPToUI instruction");
1352 for (unsigned i = 0; i < size; i++)
1353 Dest.AggregateVal[i].IntVal = APIntOps::RoundFloatToAPInt(
1354 Src.AggregateVal[i].FloatVal, DBitWidth);
1355 } else {
1356 for (unsigned i = 0; i < size; i++)
1357 Dest.AggregateVal[i].IntVal = APIntOps::RoundDoubleToAPInt(
1358 Src.AggregateVal[i].DoubleVal, DBitWidth);
1359 }
1360 } else {
1361 // scalar
1362 uint32_t DBitWidth = cast<IntegerType>(DstTy)->getBitWidth();
1363 assert(SrcTy->isFloatingPointTy() && "Invalid FPToUI instruction");
1364
1365 if (SrcTy->getTypeID() == Type::FloatTyID)
1366 Dest.IntVal = APIntOps::RoundFloatToAPInt(Src.FloatVal, DBitWidth);
1367 else {
1368 Dest.IntVal = APIntOps::RoundDoubleToAPInt(Src.DoubleVal, DBitWidth);
1369 }
1370 }
1371
1372 return Dest;
1373 }
1374
1375 GenericValue Interpreter::executeFPToSIInst(Value *SrcVal, Type *DstTy,
1376 ExecutionContext &SF) {
1377 Type *SrcTy = SrcVal->getType();
1378 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1379
1380 if (isa<VectorType>(SrcTy)) {
1381 Type *DstVecTy = DstTy->getScalarType();
1382 Type *SrcVecTy = SrcTy->getScalarType();
1383 uint32_t DBitWidth = cast<IntegerType>(DstVecTy)->getBitWidth();
1384 unsigned size = Src.AggregateVal.size();
1385 // the sizes of src and dst vectors must be equal
1386 Dest.AggregateVal.resize(size);
1387
1388 if (SrcVecTy->getTypeID() == Type::FloatTyID) {
1389 assert(SrcVecTy->isFloatingPointTy() && "Invalid FPToSI instruction");
1390 for (unsigned i = 0; i < size; i++)
1391 Dest.AggregateVal[i].IntVal = APIntOps::RoundFloatToAPInt(
1392 Src.AggregateVal[i].FloatVal, DBitWidth);
1393 } else {
1394 for (unsigned i = 0; i < size; i++)
1395 Dest.AggregateVal[i].IntVal = APIntOps::RoundDoubleToAPInt(
1396 Src.AggregateVal[i].DoubleVal, DBitWidth);
1397 }
1398 } else {
1399 // scalar
1400 unsigned DBitWidth = cast<IntegerType>(DstTy)->getBitWidth();
1401 assert(SrcTy->isFloatingPointTy() && "Invalid FPToSI instruction");
1402
1403 if (SrcTy->getTypeID() == Type::FloatTyID)
1404 Dest.IntVal = APIntOps::RoundFloatToAPInt(Src.FloatVal, DBitWidth);
1405 else {
1406 Dest.IntVal = APIntOps::RoundDoubleToAPInt(Src.DoubleVal, DBitWidth);
1407 }
1408 }
1409 return Dest;
1410 }
1411
1412 GenericValue Interpreter::executeUIToFPInst(Value *SrcVal, Type *DstTy,
1413 ExecutionContext &SF) {
1414 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1415
1416 if (isa<VectorType>(SrcVal->getType())) {
1417 Type *DstVecTy = DstTy->getScalarType();
1418 unsigned size = Src.AggregateVal.size();
1419 // the sizes of src and dst vectors must be equal
1420 Dest.AggregateVal.resize(size);
1421
1422 if (DstVecTy->getTypeID() == Type::FloatTyID) {
1423 assert(DstVecTy->isFloatingPointTy() && "Invalid UIToFP instruction");
1424 for (unsigned i = 0; i < size; i++)
1425 Dest.AggregateVal[i].FloatVal =
1426 APIntOps::RoundAPIntToFloat(Src.AggregateVal[i].IntVal);
1427 } else {
1428 for (unsigned i = 0; i < size; i++)
1429 Dest.AggregateVal[i].DoubleVal =
1430 APIntOps::RoundAPIntToDouble(Src.AggregateVal[i].IntVal);
1431 }
1432 } else {
1433 // scalar
1434 assert(DstTy->isFloatingPointTy() && "Invalid UIToFP instruction");
1435 if (DstTy->getTypeID() == Type::FloatTyID)
1436 Dest.FloatVal = APIntOps::RoundAPIntToFloat(Src.IntVal);
1437 else {
1438 Dest.DoubleVal = APIntOps::RoundAPIntToDouble(Src.IntVal);
1439 }
1440 }
1441 return Dest;
1442 }
1443
1444 GenericValue Interpreter::executeSIToFPInst(Value *SrcVal, Type *DstTy,
1445 ExecutionContext &SF) {
1446 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1447
1448 if (isa<VectorType>(SrcVal->getType())) {
1449 Type *DstVecTy = DstTy->getScalarType();
1450 unsigned size = Src.AggregateVal.size();
1451 // the sizes of src and dst vectors must be equal
1452 Dest.AggregateVal.resize(size);
1453
1454 if (DstVecTy->getTypeID() == Type::FloatTyID) {
1455 assert(DstVecTy->isFloatingPointTy() && "Invalid SIToFP instruction");
1456 for (unsigned i = 0; i < size; i++)
1457 Dest.AggregateVal[i].FloatVal =
1458 APIntOps::RoundSignedAPIntToFloat(Src.AggregateVal[i].IntVal);
1459 } else {
1460 for (unsigned i = 0; i < size; i++)
1461 Dest.AggregateVal[i].DoubleVal =
1462 APIntOps::RoundSignedAPIntToDouble(Src.AggregateVal[i].IntVal);
1463 }
1464 } else {
1465 // scalar
1466 assert(DstTy->isFloatingPointTy() && "Invalid SIToFP instruction");
1467
1468 if (DstTy->getTypeID() == Type::FloatTyID)
1469 Dest.FloatVal = APIntOps::RoundSignedAPIntToFloat(Src.IntVal);
1470 else {
1471 Dest.DoubleVal = APIntOps::RoundSignedAPIntToDouble(Src.IntVal);
1472 }
1473 }
1474
1475 return Dest;
1476 }
1477
1478 GenericValue Interpreter::executePtrToIntInst(Value *SrcVal, Type *DstTy,
1479 ExecutionContext &SF) {
1480 uint32_t DBitWidth = cast<IntegerType>(DstTy)->getBitWidth();
1481 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1482 assert(SrcVal->getType()->isPointerTy() && "Invalid PtrToInt instruction");
1483
1484 Dest.IntVal = APInt(DBitWidth, (intptr_t) Src.PointerVal);
1485 return Dest;
1486 }
1487
1488 GenericValue Interpreter::executeIntToPtrInst(Value *SrcVal, Type *DstTy,
1489 ExecutionContext &SF) {
1490 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1491 assert(DstTy->isPointerTy() && "Invalid PtrToInt instruction");
1492
1493 uint32_t PtrSize = getDataLayout().getPointerSizeInBits();
1494 if (PtrSize != Src.IntVal.getBitWidth())
1495 Src.IntVal = Src.IntVal.zextOrTrunc(PtrSize);
1496
1497 Dest.PointerVal = PointerTy(intptr_t(Src.IntVal.getZExtValue()));
1498 return Dest;
1499 }
1500
1501 GenericValue Interpreter::executeBitCastInst(Value *SrcVal, Type *DstTy,
1502 ExecutionContext &SF) {
1503
1504 // This instruction supports bitwise conversion of vectors to integers and
1505 // to vectors of other types (as long as they have the same size)
1506 Type *SrcTy = SrcVal->getType();
1507 GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1508
1509 if (isa<VectorType>(SrcTy) || isa<VectorType>(DstTy)) {
1510 // vector src bitcast to vector dst or vector src bitcast to scalar dst or
1511 // scalar src bitcast to vector dst
1512 bool isLittleEndian = getDataLayout().isLittleEndian();
1513 GenericValue TempDst, TempSrc, SrcVec;
1514 Type *SrcElemTy;
1515 Type *DstElemTy;
1516 unsigned SrcBitSize;
1517 unsigned DstBitSize;
1518 unsigned SrcNum;
1519 unsigned DstNum;
1520
1521 if (isa<VectorType>(SrcTy)) {
1522 SrcElemTy = SrcTy->getScalarType();
1523 SrcBitSize = SrcTy->getScalarSizeInBits();
1524 SrcNum = Src.AggregateVal.size();
1525 SrcVec = Src;
1526 } else {
1527 // if src is scalar value, make it vector <1 x type>
1528 SrcElemTy = SrcTy;
1529 SrcBitSize = SrcTy->getPrimitiveSizeInBits();
1530 SrcNum = 1;
1531 SrcVec.AggregateVal.push_back(Src);
1532 }
1533
1534 if (isa<VectorType>(DstTy)) {
1535 DstElemTy = DstTy->getScalarType();
1536 DstBitSize = DstTy->getScalarSizeInBits();
1537 DstNum = (SrcNum * SrcBitSize) / DstBitSize;
1538 } else {
1539 DstElemTy = DstTy;
1540 DstBitSize = DstTy->getPrimitiveSizeInBits();
1541 DstNum = 1;
1542 }
1543
1544 if (SrcNum * SrcBitSize != DstNum * DstBitSize)
1545 llvm_unreachable("Invalid BitCast");
1546
1547 // If src is floating point, cast to integer first.
1548 TempSrc.AggregateVal.resize(SrcNum);
1549 if (SrcElemTy->isFloatTy()) {
1550 for (unsigned i = 0; i < SrcNum; i++)
1551 TempSrc.AggregateVal[i].IntVal =
1552 APInt::floatToBits(SrcVec.AggregateVal[i].FloatVal);
1553
1554 } else if (SrcElemTy->isDoubleTy()) {
1555 for (unsigned i = 0; i < SrcNum; i++)
1556 TempSrc.AggregateVal[i].IntVal =
1557 APInt::doubleToBits(SrcVec.AggregateVal[i].DoubleVal);
1558 } else if (SrcElemTy->isIntegerTy()) {
1559 for (unsigned i = 0; i < SrcNum; i++)
1560 TempSrc.AggregateVal[i].IntVal = SrcVec.AggregateVal[i].IntVal;
1561 } else {
1562 // Pointers are not allowed as the element type of vector.
1563 llvm_unreachable("Invalid Bitcast");
1564 }
1565
1566 // now TempSrc is integer type vector
1567 if (DstNum < SrcNum) {
1568 // Example: bitcast <4 x i32> <i32 0, i32 1, i32 2, i32 3> to <2 x i64>
1569 unsigned Ratio = SrcNum / DstNum;
1570 unsigned SrcElt = 0;
1571 for (unsigned i = 0; i < DstNum; i++) {
1572 GenericValue Elt;
1573 Elt.IntVal = 0;
1574 Elt.IntVal = Elt.IntVal.zext(DstBitSize);
1575 unsigned ShiftAmt = isLittleEndian ? 0 : SrcBitSize * (Ratio - 1);
1576 for (unsigned j = 0; j < Ratio; j++) {
1577 APInt Tmp;
1578 Tmp = Tmp.zext(SrcBitSize);
1579 Tmp = TempSrc.AggregateVal[SrcElt++].IntVal;
1580 Tmp = Tmp.zext(DstBitSize);
1581 Tmp <<= ShiftAmt;
1582 ShiftAmt += isLittleEndian ? SrcBitSize : -SrcBitSize;
1583 Elt.IntVal |= Tmp;
1584 }
1585 TempDst.AggregateVal.push_back(Elt);
1586 }
1587 } else {
1588 // Example: bitcast <2 x i64> <i64 0, i64 1> to <4 x i32>
1589 unsigned Ratio = DstNum / SrcNum;
1590 for (unsigned i = 0; i < SrcNum; i++) {
1591 unsigned ShiftAmt = isLittleEndian ? 0 : DstBitSize * (Ratio - 1);
1592 for (unsigned j = 0; j < Ratio; j++) {
1593 GenericValue Elt;
1594 Elt.IntVal = Elt.IntVal.zext(SrcBitSize);
1595 Elt.IntVal = TempSrc.AggregateVal[i].IntVal;
1596 Elt.IntVal.lshrInPlace(ShiftAmt);
1597 // it could be DstBitSize == SrcBitSize, so check it
1598 if (DstBitSize < SrcBitSize)
1599 Elt.IntVal = Elt.IntVal.trunc(DstBitSize);
1600 ShiftAmt += isLittleEndian ? DstBitSize : -DstBitSize;
1601 TempDst.AggregateVal.push_back(Elt);
1602 }
1603 }
1604 }
1605
1606 // convert result from integer to specified type
1607 if (isa<VectorType>(DstTy)) {
1608 if (DstElemTy->isDoubleTy()) {
1609 Dest.AggregateVal.resize(DstNum);
1610 for (unsigned i = 0; i < DstNum; i++)
1611 Dest.AggregateVal[i].DoubleVal =
1612 TempDst.AggregateVal[i].IntVal.bitsToDouble();
1613 } else if (DstElemTy->isFloatTy()) {
1614 Dest.AggregateVal.resize(DstNum);
1615 for (unsigned i = 0; i < DstNum; i++)
1616 Dest.AggregateVal[i].FloatVal =
1617 TempDst.AggregateVal[i].IntVal.bitsToFloat();
1618 } else {
1619 Dest = TempDst;
1620 }
1621 } else {
1622 if (DstElemTy->isDoubleTy())
1623 Dest.DoubleVal = TempDst.AggregateVal[0].IntVal.bitsToDouble();
1624 else if (DstElemTy->isFloatTy()) {
1625 Dest.FloatVal = TempDst.AggregateVal[0].IntVal.bitsToFloat();
1626 } else {
1627 Dest.IntVal = TempDst.AggregateVal[0].IntVal;
1628 }
1629 }
1630 } else { // if (isa<VectorType>(SrcTy)) || isa<VectorType>(DstTy))
1631
1632 // scalar src bitcast to scalar dst
1633 if (DstTy->isPointerTy()) {
1634 assert(SrcTy->isPointerTy() && "Invalid BitCast");
1635 Dest.PointerVal = Src.PointerVal;
1636 } else if (DstTy->isIntegerTy()) {
1637 if (SrcTy->isFloatTy())
1638 Dest.IntVal = APInt::floatToBits(Src.FloatVal);
1639 else if (SrcTy->isDoubleTy()) {
1640 Dest.IntVal = APInt::doubleToBits(Src.DoubleVal);
1641 } else if (SrcTy->isIntegerTy()) {
1642 Dest.IntVal = Src.IntVal;
1643 } else {
1644 llvm_unreachable("Invalid BitCast");
1645 }
1646 } else if (DstTy->isFloatTy()) {
1647 if (SrcTy->isIntegerTy())
1648 Dest.FloatVal = Src.IntVal.bitsToFloat();
1649 else {
1650 Dest.FloatVal = Src.FloatVal;
1651 }
1652 } else if (DstTy->isDoubleTy()) {
1653 if (SrcTy->isIntegerTy())
1654 Dest.DoubleVal = Src.IntVal.bitsToDouble();
1655 else {
1656 Dest.DoubleVal = Src.DoubleVal;
1657 }
1658 } else {
1659 llvm_unreachable("Invalid Bitcast");
1660 }
1661 }
1662
1663 return Dest;
1664 }
1665
1666 void Interpreter::visitTruncInst(TruncInst &I) {
1667 ExecutionContext &SF = ECStack.back();
1668 SetValue(&I, executeTruncInst(I.getOperand(0), I.getType(), SF), SF);
1669 }
1670
1671 void Interpreter::visitSExtInst(SExtInst &I) {
1672 ExecutionContext &SF = ECStack.back();
1673 SetValue(&I, executeSExtInst(I.getOperand(0), I.getType(), SF), SF);
1674 }
1675
1676 void Interpreter::visitZExtInst(ZExtInst &I) {
1677 ExecutionContext &SF = ECStack.back();
1678 SetValue(&I, executeZExtInst(I.getOperand(0), I.getType(), SF), SF);
1679 }
1680
1681 void Interpreter::visitFPTruncInst(FPTruncInst &I) {
1682 ExecutionContext &SF = ECStack.back();
1683 SetValue(&I, executeFPTruncInst(I.getOperand(0), I.getType(), SF), SF);
1684 }
1685
1686 void Interpreter::visitFPExtInst(FPExtInst &I) {
1687 ExecutionContext &SF = ECStack.back();
1688 SetValue(&I, executeFPExtInst(I.getOperand(0), I.getType(), SF), SF);
1689 }
1690
1691 void Interpreter::visitUIToFPInst(UIToFPInst &I) {
1692 ExecutionContext &SF = ECStack.back();
1693 SetValue(&I, executeUIToFPInst(I.getOperand(0), I.getType(), SF), SF);
1694 }
1695
1696 void Interpreter::visitSIToFPInst(SIToFPInst &I) {
1697 ExecutionContext &SF = ECStack.back();
1698 SetValue(&I, executeSIToFPInst(I.getOperand(0), I.getType(), SF), SF);
1699 }
1700
1701 void Interpreter::visitFPToUIInst(FPToUIInst &I) {
1702 ExecutionContext &SF = ECStack.back();
1703 SetValue(&I, executeFPToUIInst(I.getOperand(0), I.getType(), SF), SF);
1704 }
1705
1706 void Interpreter::visitFPToSIInst(FPToSIInst &I) {
1707 ExecutionContext &SF = ECStack.back();
1708 SetValue(&I, executeFPToSIInst(I.getOperand(0), I.getType(), SF), SF);
1709 }
1710
1711 void Interpreter::visitPtrToIntInst(PtrToIntInst &I) {
1712 ExecutionContext &SF = ECStack.back();
1713 SetValue(&I, executePtrToIntInst(I.getOperand(0), I.getType(), SF), SF);
1714 }
1715
1716 void Interpreter::visitIntToPtrInst(IntToPtrInst &I) {
1717 ExecutionContext &SF = ECStack.back();
1718 SetValue(&I, executeIntToPtrInst(I.getOperand(0), I.getType(), SF), SF);
1719 }
1720
1721 void Interpreter::visitBitCastInst(BitCastInst &I) {
1722 ExecutionContext &SF = ECStack.back();
1723 SetValue(&I, executeBitCastInst(I.getOperand(0), I.getType(), SF), SF);
1724 }
1725
1726 #define IMPLEMENT_VAARG(TY) \
1727 case Type::TY##TyID: Dest.TY##Val = Src.TY##Val; break
1728
1729 void Interpreter::visitVAArgInst(VAArgInst &I) {
1730 ExecutionContext &SF = ECStack.back();
1731
1732 // Get the incoming valist parameter. LLI treats the valist as a
1733 // (ec-stack-depth var-arg-index) pair.
1734 GenericValue VAList = getOperandValue(I.getOperand(0), SF);
1735 GenericValue Dest;
1736 GenericValue Src = ECStack[VAList.UIntPairVal.first]
1737 .VarArgs[VAList.UIntPairVal.second];
1738 Type *Ty = I.getType();
1739 switch (Ty->getTypeID()) {
1740 case Type::IntegerTyID:
1741 Dest.IntVal = Src.IntVal;
1742 break;
1743 IMPLEMENT_VAARG(Pointer);
1744 IMPLEMENT_VAARG(Float);
1745 IMPLEMENT_VAARG(Double);
1746 default:
1747 dbgs() << "Unhandled dest type for vaarg instruction: " << *Ty << "\n";
1748 llvm_unreachable(nullptr);
1749 }
1750
1751 // Set the Value of this Instruction.
1752 SetValue(&I, Dest, SF);
1753
1754 // Move the pointer to the next vararg.
1755 ++VAList.UIntPairVal.second;
1756 }
1757
1758 void Interpreter::visitExtractElementInst(ExtractElementInst &I) {
1759 ExecutionContext &SF = ECStack.back();
1760 GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1761 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1762 GenericValue Dest;
1763
1764 Type *Ty = I.getType();
1765 const unsigned indx = unsigned(Src2.IntVal.getZExtValue());
1766
1767 if(Src1.AggregateVal.size() > indx) {
1768 switch (Ty->getTypeID()) {
1769 default:
1770 dbgs() << "Unhandled destination type for extractelement instruction: "
1771 << *Ty << "\n";
1772 llvm_unreachable(nullptr);
1773 break;
1774 case Type::IntegerTyID:
1775 Dest.IntVal = Src1.AggregateVal[indx].IntVal;
1776 break;
1777 case Type::FloatTyID:
1778 Dest.FloatVal = Src1.AggregateVal[indx].FloatVal;
1779 break;
1780 case Type::DoubleTyID:
1781 Dest.DoubleVal = Src1.AggregateVal[indx].DoubleVal;
1782 break;
1783 }
1784 } else {
1785 dbgs() << "Invalid index in extractelement instruction\n";
1786 }
1787
1788 SetValue(&I, Dest, SF);
1789 }
1790
1791 void Interpreter::visitInsertElementInst(InsertElementInst &I) {
1792 ExecutionContext &SF = ECStack.back();
1793 VectorType *Ty = cast<VectorType>(I.getType());
1794
1795 GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1796 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1797 GenericValue Src3 = getOperandValue(I.getOperand(2), SF);
1798 GenericValue Dest;
1799
1800 Type *TyContained = Ty->getElementType();
1801
1802 const unsigned indx = unsigned(Src3.IntVal.getZExtValue());
1803 Dest.AggregateVal = Src1.AggregateVal;
1804
1805 if(Src1.AggregateVal.size() <= indx)
1806 llvm_unreachable("Invalid index in insertelement instruction");
1807 switch (TyContained->getTypeID()) {
1808 default:
1809 llvm_unreachable("Unhandled dest type for insertelement instruction");
1810 case Type::IntegerTyID:
1811 Dest.AggregateVal[indx].IntVal = Src2.IntVal;
1812 break;
1813 case Type::FloatTyID:
1814 Dest.AggregateVal[indx].FloatVal = Src2.FloatVal;
1815 break;
1816 case Type::DoubleTyID:
1817 Dest.AggregateVal[indx].DoubleVal = Src2.DoubleVal;
1818 break;
1819 }
1820 SetValue(&I, Dest, SF);
1821 }
1822
1823 void Interpreter::visitShuffleVectorInst(ShuffleVectorInst &I){
1824 ExecutionContext &SF = ECStack.back();
1825
1826 VectorType *Ty = cast<VectorType>(I.getType());
1827
1828 GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1829 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1830 GenericValue Dest;
1831
1832 // There is no need to check types of src1 and src2, because the compiled
1833 // bytecode can't contain different types for src1 and src2 for a
1834 // shufflevector instruction.
1835
1836 Type *TyContained = Ty->getElementType();
1837 unsigned src1Size = (unsigned)Src1.AggregateVal.size();
1838 unsigned src2Size = (unsigned)Src2.AggregateVal.size();
1839 unsigned src3Size = I.getShuffleMask().size();
1840
1841 Dest.AggregateVal.resize(src3Size);
1842
1843 switch (TyContained->getTypeID()) {
1844 default:
1845 llvm_unreachable("Unhandled dest type for insertelement instruction");
1846 break;
1847 case Type::IntegerTyID:
1848 for( unsigned i=0; i<src3Size; i++) {
1849 unsigned j = std::max(0, I.getMaskValue(i));
1850 if(j < src1Size)
1851 Dest.AggregateVal[i].IntVal = Src1.AggregateVal[j].IntVal;
1852 else if(j < src1Size + src2Size)
1853 Dest.AggregateVal[i].IntVal = Src2.AggregateVal[j-src1Size].IntVal;
1854 else
1855 // The selector may not be greater than sum of lengths of first and
1856 // second operands and llasm should not allow situation like
1857 // %tmp = shufflevector <2 x i32> <i32 3, i32 4>, <2 x i32> undef,
1858 // <2 x i32> < i32 0, i32 5 >,
1859 // where i32 5 is invalid, but let it be additional check here:
1860 llvm_unreachable("Invalid mask in shufflevector instruction");
1861 }
1862 break;
1863 case Type::FloatTyID:
1864 for( unsigned i=0; i<src3Size; i++) {
1865 unsigned j = std::max(0, I.getMaskValue(i));
1866 if(j < src1Size)
1867 Dest.AggregateVal[i].FloatVal = Src1.AggregateVal[j].FloatVal;
1868 else if(j < src1Size + src2Size)
1869 Dest.AggregateVal[i].FloatVal = Src2.AggregateVal[j-src1Size].FloatVal;
1870 else
1871 llvm_unreachable("Invalid mask in shufflevector instruction");
1872 }
1873 break;
1874 case Type::DoubleTyID:
1875 for( unsigned i=0; i<src3Size; i++) {
1876 unsigned j = std::max(0, I.getMaskValue(i));
1877 if(j < src1Size)
1878 Dest.AggregateVal[i].DoubleVal = Src1.AggregateVal[j].DoubleVal;
1879 else if(j < src1Size + src2Size)
1880 Dest.AggregateVal[i].DoubleVal =
1881 Src2.AggregateVal[j-src1Size].DoubleVal;
1882 else
1883 llvm_unreachable("Invalid mask in shufflevector instruction");
1884 }
1885 break;
1886 }
1887 SetValue(&I, Dest, SF);
1888 }
1889
1890 void Interpreter::visitExtractValueInst(ExtractValueInst &I) {
1891 ExecutionContext &SF = ECStack.back();
1892 Value *Agg = I.getAggregateOperand();
1893 GenericValue Dest;
1894 GenericValue Src = getOperandValue(Agg, SF);
1895
1896 ExtractValueInst::idx_iterator IdxBegin = I.idx_begin();
1897 unsigned Num = I.getNumIndices();
1898 GenericValue *pSrc = &Src;
1899
1900 for (unsigned i = 0 ; i < Num; ++i) {
1901 pSrc = &pSrc->AggregateVal[*IdxBegin];
1902 ++IdxBegin;
1903 }
1904
1905 Type *IndexedType = ExtractValueInst::getIndexedType(Agg->getType(), I.getIndices());
1906 switch (IndexedType->getTypeID()) {
1907 default:
1908 llvm_unreachable("Unhandled dest type for extractelement instruction");
1909 break;
1910 case Type::IntegerTyID:
1911 Dest.IntVal = pSrc->IntVal;
1912 break;
1913 case Type::FloatTyID:
1914 Dest.FloatVal = pSrc->FloatVal;
1915 break;
1916 case Type::DoubleTyID:
1917 Dest.DoubleVal = pSrc->DoubleVal;
1918 break;
1919 case Type::ArrayTyID:
1920 case Type::StructTyID:
1921 case Type::FixedVectorTyID:
1922 case Type::ScalableVectorTyID:
1923 Dest.AggregateVal = pSrc->AggregateVal;
1924 break;
1925 case Type::PointerTyID:
1926 Dest.PointerVal = pSrc->PointerVal;
1927 break;
1928 }
1929
1930 SetValue(&I, Dest, SF);
1931 }
1932
1933 void Interpreter::visitInsertValueInst(InsertValueInst &I) {
1934
1935 ExecutionContext &SF = ECStack.back();
1936 Value *Agg = I.getAggregateOperand();
1937
1938 GenericValue Src1 = getOperandValue(Agg, SF);
1939 GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1940 GenericValue Dest = Src1; // Dest is a slightly changed Src1
1941
1942 ExtractValueInst::idx_iterator IdxBegin = I.idx_begin();
1943 unsigned Num = I.getNumIndices();
1944
1945 GenericValue *pDest = &Dest;
1946 for (unsigned i = 0 ; i < Num; ++i) {
1947 pDest = &pDest->AggregateVal[*IdxBegin];
1948 ++IdxBegin;
1949 }
1950 // pDest points to the target value in the Dest now
1951
1952 Type *IndexedType = ExtractValueInst::getIndexedType(Agg->getType(), I.getIndices());
1953
1954 switch (IndexedType->getTypeID()) {
1955 default:
1956 llvm_unreachable("Unhandled dest type for insertelement instruction");
1957 break;
1958 case Type::IntegerTyID:
1959 pDest->IntVal = Src2.IntVal;
1960 break;
1961 case Type::FloatTyID:
1962 pDest->FloatVal = Src2.FloatVal;
1963 break;
1964 case Type::DoubleTyID:
1965 pDest->DoubleVal = Src2.DoubleVal;
1966 break;
1967 case Type::ArrayTyID:
1968 case Type::StructTyID:
1969 case Type::FixedVectorTyID:
1970 case Type::ScalableVectorTyID:
1971 pDest->AggregateVal = Src2.AggregateVal;
1972 break;
1973 case Type::PointerTyID:
1974 pDest->PointerVal = Src2.PointerVal;
1975 break;
1976 }
1977
1978 SetValue(&I, Dest, SF);
1979 }
1980
1981 GenericValue Interpreter::getConstantExprValue (ConstantExpr *CE,
1982 ExecutionContext &SF) {
1983 switch (CE->getOpcode()) {
1984 case Instruction::Trunc:
1985 return executeTruncInst(CE->getOperand(0), CE->getType(), SF);
1986 case Instruction::PtrToInt:
1987 return executePtrToIntInst(CE->getOperand(0), CE->getType(), SF);
1988 case Instruction::IntToPtr:
1989 return executeIntToPtrInst(CE->getOperand(0), CE->getType(), SF);
1990 case Instruction::BitCast:
1991 return executeBitCastInst(CE->getOperand(0), CE->getType(), SF);
1992 case Instruction::GetElementPtr:
1993 return executeGEPOperation(CE->getOperand(0), gep_type_begin(CE),
1994 gep_type_end(CE), SF);
1995 break;
1996 }
1997
1998 // The cases below here require a GenericValue parameter for the result
1999 // so we initialize one, compute it and then return it.
2000 GenericValue Op0 = getOperandValue(CE->getOperand(0), SF);
2001 GenericValue Op1 = getOperandValue(CE->getOperand(1), SF);
2002 GenericValue Dest;
2003 switch (CE->getOpcode()) {
2004 case Instruction::Add: Dest.IntVal = Op0.IntVal + Op1.IntVal; break;
2005 case Instruction::Sub: Dest.IntVal = Op0.IntVal - Op1.IntVal; break;
2006 case Instruction::Mul: Dest.IntVal = Op0.IntVal * Op1.IntVal; break;
2007 case Instruction::Xor: Dest.IntVal = Op0.IntVal ^ Op1.IntVal; break;
2008 case Instruction::Shl:
2009 Dest.IntVal = Op0.IntVal.shl(Op1.IntVal.getZExtValue());
2010 break;
2011 default:
2012 dbgs() << "Unhandled ConstantExpr: " << *CE << "\n";
2013 llvm_unreachable("Unhandled ConstantExpr");
2014 }
2015 return Dest;
2016 }
2017
2018 GenericValue Interpreter::getOperandValue(Value *V, ExecutionContext &SF) {
2019 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
2020 return getConstantExprValue(CE, SF);
2021 } else if (Constant *CPV = dyn_cast<Constant>(V)) {
2022 return getConstantValue(CPV);
2023 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
2024 return PTOGV(getPointerToGlobal(GV));
2025 } else {
2026 return SF.Values[V];
2027 }
2028 }
2029
2030 //===----------------------------------------------------------------------===//
2031 // Dispatch and Execution Code
2032 //===----------------------------------------------------------------------===//
2033
2034 //===----------------------------------------------------------------------===//
2035 // callFunction - Execute the specified function...
2036 //
2037 void Interpreter::callFunction(Function *F, ArrayRef<GenericValue> ArgVals) {
2038 assert((ECStack.empty() || !ECStack.back().Caller ||
2039 ECStack.back().Caller->arg_size() == ArgVals.size()) &&
2040 "Incorrect number of arguments passed into function call!");
2041 // Make a new stack frame... and fill it in.
2042 ECStack.emplace_back();
2043 ExecutionContext &StackFrame = ECStack.back();
2044 StackFrame.CurFunction = F;
2045
2046 // Special handling for external functions.
2047 if (F->isDeclaration()) {
2048 GenericValue Result = callExternalFunction (F, ArgVals);
2049 // Simulate a 'ret' instruction of the appropriate type.
2050 popStackAndReturnValueToCaller (F->getReturnType (), Result);
2051 return;
2052 }
2053
2054 // Get pointers to first LLVM BB & Instruction in function.
2055 StackFrame.CurBB = &F->front();
2056 StackFrame.CurInst = StackFrame.CurBB->begin();
2057
2058 // Run through the function arguments and initialize their values...
2059 assert((ArgVals.size() == F->arg_size() ||
2060 (ArgVals.size() > F->arg_size() && F->getFunctionType()->isVarArg()))&&
2061 "Invalid number of values passed to function invocation!");
2062
2063 // Handle non-varargs arguments...
2064 unsigned i = 0;
2065 for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end();
2066 AI != E; ++AI, ++i)
2067 SetValue(&*AI, ArgVals[i], StackFrame);
2068
2069 // Handle varargs arguments...
2070 StackFrame.VarArgs.assign(ArgVals.begin()+i, ArgVals.end());
2071 }
2072
2073
2074 void Interpreter::run() {
2075 while (!ECStack.empty()) {
2076 // Interpret a single instruction & increment the "PC".
2077 ExecutionContext &SF = ECStack.back(); // Current stack frame
2078 Instruction &I = *SF.CurInst++; // Increment before execute
2079
2080 // Track the number of dynamic instructions executed.
2081 ++NumDynamicInsts;
2082
2083 LLVM_DEBUG(dbgs() << "About to interpret: " << I << "\n");
2084 visit(I); // Dispatch to one of the visit* methods...
2085 }
2086 }
LLVM monorepo