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1 : //===--- CGExprComplex.cpp - Emit LLVM Code for Complex Exprs -------------===//
2 : //
3 : // The LLVM Compiler Infrastructure
4 : //
5 : // This file is distributed under the University of Illinois Open Source
6 : // License. See LICENSE.TXT for details.
7 : //
8 : //===----------------------------------------------------------------------===//
9 : //
10 : // This contains code to emit Expr nodes with complex types as LLVM code.
11 : //
12 : //===----------------------------------------------------------------------===//
13 :
14 : #include "CodeGenFunction.h"
15 : #include "CodeGenModule.h"
16 : #include "clang/AST/ASTContext.h"
17 : #include "clang/AST/StmtVisitor.h"
18 : #include "llvm/Constants.h"
19 : #include "llvm/Function.h"
20 : #include "llvm/ADT/SmallString.h"
21 : using namespace clang;
22 : using namespace CodeGen;
23 :
24 : //===----------------------------------------------------------------------===//
25 : // Complex Expression Emitter
26 : //===----------------------------------------------------------------------===//
27 :
28 : typedef CodeGenFunction::ComplexPairTy ComplexPairTy;
29 :
30 : namespace {
31 : class ComplexExprEmitter
32 : : public StmtVisitor<ComplexExprEmitter, ComplexPairTy> {
33 : CodeGenFunction &CGF;
34 : CGBuilderTy &Builder;
35 : // True is we should ignore the value of a
36 : bool IgnoreReal;
37 : bool IgnoreImag;
38 : // True if we should ignore the value of a=b
39 : bool IgnoreRealAssign;
40 : bool IgnoreImagAssign;
41 : public:
42 : ComplexExprEmitter(CodeGenFunction &cgf, bool ir=false, bool ii=false,
43 236: bool irn=false, bool iin=false)
44 : : CGF(cgf), Builder(CGF.Builder), IgnoreReal(ir), IgnoreImag(ii),
45 236: IgnoreRealAssign(irn), IgnoreImagAssign(iin) {
46 236: }
47 :
48 :
49 : //===--------------------------------------------------------------------===//
50 : // Utilities
51 : //===--------------------------------------------------------------------===//
52 :
53 95: bool TestAndClearIgnoreReal() {
54 95: bool I = IgnoreReal;
55 95: IgnoreReal = false;
56 95: return I;
57 : }
58 95: bool TestAndClearIgnoreImag() {
59 95: bool I = IgnoreImag;
60 95: IgnoreImag = false;
61 95: return I;
62 : }
63 94: bool TestAndClearIgnoreRealAssign() {
64 94: bool I = IgnoreRealAssign;
65 94: IgnoreRealAssign = false;
66 94: return I;
67 : }
68 94: bool TestAndClearIgnoreImagAssign() {
69 94: bool I = IgnoreImagAssign;
70 94: IgnoreImagAssign = false;
71 94: return I;
72 : }
73 :
74 : /// EmitLoadOfLValue - Given an expression with complex type that represents a
75 : /// value l-value, this method emits the address of the l-value, then loads
76 : /// and returns the result.
77 147: ComplexPairTy EmitLoadOfLValue(const Expr *E) {
78 147: LValue LV = CGF.EmitLValue(E);
141: branch 1 taken
6: branch 2 taken
79 147: if (LV.isSimple())
80 141: return EmitLoadOfComplex(LV.getAddress(), LV.isVolatileQualified());
81 :
2: branch 1 taken
4: branch 2 taken
82 6: if (LV.isPropertyRef())
83 2: return CGF.EmitObjCPropertyGet(LV.getPropertyRefExpr()).getComplexVal();
84 :
4: branch 1 taken
0: branch 2 not taken
85 4: assert(LV.isKVCRef() && "Unknown LValue type!");
86 4: return CGF.EmitObjCPropertyGet(LV.getKVCRefExpr()).getComplexVal();
87 : }
88 :
89 : /// EmitLoadOfComplex - Given a pointer to a complex value, emit code to load
90 : /// the real and imaginary pieces.
91 : ComplexPairTy EmitLoadOfComplex(llvm::Value *SrcPtr, bool isVolatile);
92 :
93 : /// EmitStoreOfComplex - Store the specified real/imag parts into the
94 : /// specified value pointer.
95 : void EmitStoreOfComplex(ComplexPairTy Val, llvm::Value *ResPtr, bool isVol);
96 :
97 : /// EmitComplexToComplexCast - Emit a cast from complex value Val to DestType.
98 : ComplexPairTy EmitComplexToComplexCast(ComplexPairTy Val, QualType SrcType,
99 : QualType DestType);
100 :
101 : //===--------------------------------------------------------------------===//
102 : // Visitor Methods
103 : //===--------------------------------------------------------------------===//
104 :
105 0: ComplexPairTy VisitStmt(Stmt *S) {
106 0: S->dump(CGF.getContext().getSourceManager());
107 0: assert(0 && "Stmt can't have complex result type!");
108 : return ComplexPairTy();
109 : }
110 : ComplexPairTy VisitExpr(Expr *S);
111 25: ComplexPairTy VisitParenExpr(ParenExpr *PE) { return Visit(PE->getSubExpr());}
112 : ComplexPairTy VisitImaginaryLiteral(const ImaginaryLiteral *IL);
113 :
114 : // l-values.
115 116: ComplexPairTy VisitDeclRefExpr(const Expr *E) { return EmitLoadOfLValue(E); }
116 22: ComplexPairTy VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
117 22: return EmitLoadOfLValue(E);
118 : }
119 2: ComplexPairTy VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
120 2: return EmitLoadOfLValue(E);
121 : }
122 : ComplexPairTy VisitObjCImplicitSetterGetterRefExpr(
123 4: ObjCImplicitSetterGetterRefExpr *E) {
124 4: return EmitLoadOfLValue(E);
125 : }
126 2: ComplexPairTy VisitObjCMessageExpr(ObjCMessageExpr *E) {
127 2: return CGF.EmitObjCMessageExpr(E).getComplexVal();
128 : }
129 0: ComplexPairTy VisitArraySubscriptExpr(Expr *E) { return EmitLoadOfLValue(E); }
130 2: ComplexPairTy VisitMemberExpr(const Expr *E) { return EmitLoadOfLValue(E); }
131 :
132 : // FIXME: CompoundLiteralExpr
133 :
134 : ComplexPairTy EmitCast(Expr *Op, QualType DestTy);
135 69: ComplexPairTy VisitImplicitCastExpr(ImplicitCastExpr *E) {
136 : // Unlike for scalars, we don't have to worry about function->ptr demotion
137 : // here.
138 69: return EmitCast(E->getSubExpr(), E->getType());
139 : }
140 1: ComplexPairTy VisitCastExpr(CastExpr *E) {
141 1: return EmitCast(E->getSubExpr(), E->getType());
142 : }
143 : ComplexPairTy VisitCallExpr(const CallExpr *E);
144 : ComplexPairTy VisitStmtExpr(const StmtExpr *E);
145 :
146 : // Operators.
147 : ComplexPairTy VisitPrePostIncDec(const UnaryOperator *E,
148 8: bool isInc, bool isPre) {
149 8: LValue LV = CGF.EmitLValue(E->getSubExpr());
150 8: return CGF.EmitComplexPrePostIncDec(E, LV, isInc, isPre);
151 : }
152 2: ComplexPairTy VisitUnaryPostDec(const UnaryOperator *E) {
153 2: return VisitPrePostIncDec(E, false, false);
154 : }
155 2: ComplexPairTy VisitUnaryPostInc(const UnaryOperator *E) {
156 2: return VisitPrePostIncDec(E, true, false);
157 : }
158 2: ComplexPairTy VisitUnaryPreDec(const UnaryOperator *E) {
159 2: return VisitPrePostIncDec(E, false, true);
160 : }
161 2: ComplexPairTy VisitUnaryPreInc(const UnaryOperator *E) {
162 2: return VisitPrePostIncDec(E, true, true);
163 : }
164 0: ComplexPairTy VisitUnaryDeref(const Expr *E) { return EmitLoadOfLValue(E); }
165 3: ComplexPairTy VisitUnaryPlus (const UnaryOperator *E) {
166 3: TestAndClearIgnoreReal();
167 3: TestAndClearIgnoreImag();
168 3: TestAndClearIgnoreRealAssign();
169 3: TestAndClearIgnoreImagAssign();
170 3: return Visit(E->getSubExpr());
171 : }
172 : ComplexPairTy VisitUnaryMinus (const UnaryOperator *E);
173 : ComplexPairTy VisitUnaryNot (const UnaryOperator *E);
174 : // LNot,Real,Imag never return complex.
175 0: ComplexPairTy VisitUnaryExtension(const UnaryOperator *E) {
176 0: return Visit(E->getSubExpr());
177 : }
178 5: ComplexPairTy VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) {
179 5: return Visit(DAE->getExpr());
180 : }
181 0: ComplexPairTy VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) {
182 0: return CGF.EmitCXXExprWithTemporaries(E).getComplexVal();
183 : }
184 2: ComplexPairTy VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) {
2: branch 3 taken
0: branch 4 not taken
185 2: assert(E->getType()->isAnyComplexType() && "Expected complex type!");
186 2: QualType Elem = E->getType()->getAs<ComplexType>()->getElementType();
187 2: llvm::Constant *Null = llvm::Constant::getNullValue(CGF.ConvertType(Elem));
188 2: return ComplexPairTy(Null, Null);
189 : }
190 1: ComplexPairTy VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
1: branch 3 taken
0: branch 4 not taken
191 1: assert(E->getType()->isAnyComplexType() && "Expected complex type!");
192 1: QualType Elem = E->getType()->getAs<ComplexType>()->getElementType();
193 : llvm::Constant *Null =
194 1: llvm::Constant::getNullValue(CGF.ConvertType(Elem));
195 1: return ComplexPairTy(Null, Null);
196 : }
197 :
198 45: struct BinOpInfo {
199 : ComplexPairTy LHS;
200 : ComplexPairTy RHS;
201 : QualType Ty; // Computation Type.
202 : };
203 :
204 : BinOpInfo EmitBinOps(const BinaryOperator *E);
205 : ComplexPairTy EmitCompoundAssign(const CompoundAssignOperator *E,
206 : ComplexPairTy (ComplexExprEmitter::*Func)
207 : (const BinOpInfo &));
208 :
209 : ComplexPairTy EmitBinAdd(const BinOpInfo &Op);
210 : ComplexPairTy EmitBinSub(const BinOpInfo &Op);
211 : ComplexPairTy EmitBinMul(const BinOpInfo &Op);
212 : ComplexPairTy EmitBinDiv(const BinOpInfo &Op);
213 :
214 6: ComplexPairTy VisitBinMul(const BinaryOperator *E) {
215 6: return EmitBinMul(EmitBinOps(E));
216 : }
217 31: ComplexPairTy VisitBinAdd(const BinaryOperator *E) {
218 31: return EmitBinAdd(EmitBinOps(E));
219 : }
220 2: ComplexPairTy VisitBinSub(const BinaryOperator *E) {
221 2: return EmitBinSub(EmitBinOps(E));
222 : }
223 0: ComplexPairTy VisitBinDiv(const BinaryOperator *E) {
224 0: return EmitBinDiv(EmitBinOps(E));
225 : }
226 :
227 : // Compound assignments.
228 4: ComplexPairTy VisitBinAddAssign(const CompoundAssignOperator *E) {
229 4: return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinAdd);
230 : }
231 0: ComplexPairTy VisitBinSubAssign(const CompoundAssignOperator *E) {
232 0: return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinSub);
233 : }
234 0: ComplexPairTy VisitBinMulAssign(const CompoundAssignOperator *E) {
235 0: return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinMul);
236 : }
237 2: ComplexPairTy VisitBinDivAssign(const CompoundAssignOperator *E) {
238 2: return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinDiv);
239 : }
240 :
241 : // GCC rejects rem/and/or/xor for integer complex.
242 : // Logical and/or always return int, never complex.
243 :
244 : // No comparisons produce a complex result.
245 : ComplexPairTy VisitBinAssign (const BinaryOperator *E);
246 : ComplexPairTy VisitBinComma (const BinaryOperator *E);
247 :
248 :
249 : ComplexPairTy VisitConditionalOperator(const ConditionalOperator *CO);
250 : ComplexPairTy VisitChooseExpr(ChooseExpr *CE);
251 :
252 : ComplexPairTy VisitInitListExpr(InitListExpr *E);
253 :
254 : ComplexPairTy VisitVAArgExpr(VAArgExpr *E);
255 : };
256 : } // end anonymous namespace.
257 :
258 : //===----------------------------------------------------------------------===//
259 : // Utilities
260 : //===----------------------------------------------------------------------===//
261 :
262 : /// EmitLoadOfComplex - Given an RValue reference for a complex, emit code to
263 : /// load the real and imaginary pieces, returning them as Real/Imag.
264 : ComplexPairTy ComplexExprEmitter::EmitLoadOfComplex(llvm::Value *SrcPtr,
265 217: bool isVolatile) {
266 217: llvm::Value *Real=0, *Imag=0;
267 :
156: branch 0 taken
61: branch 1 taken
268 217: if (!IgnoreReal) {
269 : llvm::Value *RealP = Builder.CreateStructGEP(SrcPtr, 0,
270 156: SrcPtr->getName() + ".realp");
271 156: Real = Builder.CreateLoad(RealP, isVolatile, SrcPtr->getName() + ".real");
272 : }
273 :
152: branch 0 taken
65: branch 1 taken
274 217: if (!IgnoreImag) {
275 : llvm::Value *ImagP = Builder.CreateStructGEP(SrcPtr, 1,
276 152: SrcPtr->getName() + ".imagp");
277 152: Imag = Builder.CreateLoad(ImagP, isVolatile, SrcPtr->getName() + ".imag");
278 : }
279 217: return ComplexPairTy(Real, Imag);
280 : }
281 :
282 : /// EmitStoreOfComplex - Store the specified real/imag parts into the
283 : /// specified value pointer.
284 : void ComplexExprEmitter::EmitStoreOfComplex(ComplexPairTy Val, llvm::Value *Ptr,
285 111: bool isVolatile) {
286 111: llvm::Value *RealPtr = Builder.CreateStructGEP(Ptr, 0, "real");
287 111: llvm::Value *ImagPtr = Builder.CreateStructGEP(Ptr, 1, "imag");
288 :
289 111: Builder.CreateStore(Val.first, RealPtr, isVolatile);
290 111: Builder.CreateStore(Val.second, ImagPtr, isVolatile);
291 111: }
292 :
293 :
294 :
295 : //===----------------------------------------------------------------------===//
296 : // Visitor Methods
297 : //===----------------------------------------------------------------------===//
298 :
299 0: ComplexPairTy ComplexExprEmitter::VisitExpr(Expr *E) {
300 0: CGF.ErrorUnsupported(E, "complex expression");
301 : const llvm::Type *EltTy =
302 0: CGF.ConvertType(E->getType()->getAs<ComplexType>()->getElementType());
303 0: llvm::Value *U = llvm::UndefValue::get(EltTy);
304 0: return ComplexPairTy(U, U);
305 : }
306 :
307 : ComplexPairTy ComplexExprEmitter::
308 19: VisitImaginaryLiteral(const ImaginaryLiteral *IL) {
309 19: llvm::Value *Imag = CGF.EmitScalarExpr(IL->getSubExpr());
310 : return
311 19: ComplexPairTy(llvm::Constant::getNullValue(Imag->getType()), Imag);
312 : }
313 :
314 :
315 7: ComplexPairTy ComplexExprEmitter::VisitCallExpr(const CallExpr *E) {
1: branch 3 taken
6: branch 4 taken
316 7: if (E->getCallReturnType()->isReferenceType())
317 1: return EmitLoadOfLValue(E);
318 :
319 6: return CGF.EmitCallExpr(E).getComplexVal();
320 : }
321 :
322 0: ComplexPairTy ComplexExprEmitter::VisitStmtExpr(const StmtExpr *E) {
323 0: return CGF.EmitCompoundStmt(*E->getSubStmt(), true).getComplexVal();
324 : }
325 :
326 : /// EmitComplexToComplexCast - Emit a cast from complex value Val to DestType.
327 : ComplexPairTy ComplexExprEmitter::EmitComplexToComplexCast(ComplexPairTy Val,
328 : QualType SrcType,
329 60: QualType DestType) {
330 : // Get the src/dest element type.
331 60: SrcType = SrcType->getAs<ComplexType>()->getElementType();
332 60: DestType = DestType->getAs<ComplexType>()->getElementType();
333 :
334 : // C99 6.3.1.6: When a value of complex type is converted to another
335 : // complex type, both the real and imaginary parts follow the conversion
336 : // rules for the corresponding real types.
337 60: Val.first = CGF.EmitScalarConversion(Val.first, SrcType, DestType);
338 60: Val.second = CGF.EmitScalarConversion(Val.second, SrcType, DestType);
339 60: return Val;
340 : }
341 :
342 76: ComplexPairTy ComplexExprEmitter::EmitCast(Expr *Op, QualType DestTy) {
343 : // Two cases here: cast from (complex to complex) and (scalar to complex).
48: branch 3 taken
28: branch 4 taken
344 76: if (Op->getType()->isAnyComplexType())
345 48: return EmitComplexToComplexCast(Visit(Op), Op->getType(), DestTy);
346 :
347 : // C99 6.3.1.7: When a value of real type is converted to a complex type, the
348 : // real part of the complex result value is determined by the rules of
349 : // conversion to the corresponding real type and the imaginary part of the
350 : // complex result value is a positive zero or an unsigned zero.
351 28: llvm::Value *Elt = CGF.EmitScalarExpr(Op);
352 :
353 : // Convert the input element to the element type of the complex.
354 28: DestTy = DestTy->getAs<ComplexType>()->getElementType();
355 28: Elt = CGF.EmitScalarConversion(Elt, Op->getType(), DestTy);
356 :
357 : // Return (realval, 0).
358 28: return ComplexPairTy(Elt, llvm::Constant::getNullValue(Elt->getType()));
359 : }
360 :
361 2: ComplexPairTy ComplexExprEmitter::VisitUnaryMinus(const UnaryOperator *E) {
362 2: TestAndClearIgnoreReal();
363 2: TestAndClearIgnoreImag();
364 2: TestAndClearIgnoreRealAssign();
365 2: TestAndClearIgnoreImagAssign();
366 2: ComplexPairTy Op = Visit(E->getSubExpr());
367 :
368 : llvm::Value *ResR, *ResI;
1: branch 2 taken
1: branch 3 taken
369 2: if (Op.first->getType()->isFloatingPoint()) {
370 1: ResR = Builder.CreateFNeg(Op.first, "neg.r");
371 1: ResI = Builder.CreateFNeg(Op.second, "neg.i");
372 : } else {
373 1: ResR = Builder.CreateNeg(Op.first, "neg.r");
374 1: ResI = Builder.CreateNeg(Op.second, "neg.i");
375 : }
376 2: return ComplexPairTy(ResR, ResI);
377 : }
378 :
379 2: ComplexPairTy ComplexExprEmitter::VisitUnaryNot(const UnaryOperator *E) {
380 2: TestAndClearIgnoreReal();
381 2: TestAndClearIgnoreImag();
382 2: TestAndClearIgnoreRealAssign();
383 2: TestAndClearIgnoreImagAssign();
384 : // ~(a+ib) = a + i*-b
385 2: ComplexPairTy Op = Visit(E->getSubExpr());
386 : llvm::Value *ResI;
1: branch 2 taken
1: branch 3 taken
387 2: if (Op.second->getType()->isFloatingPoint())
388 1: ResI = Builder.CreateFNeg(Op.second, "conj.i");
389 : else
390 1: ResI = Builder.CreateNeg(Op.second, "conj.i");
391 :
392 2: return ComplexPairTy(Op.first, ResI);
393 : }
394 :
395 35: ComplexPairTy ComplexExprEmitter::EmitBinAdd(const BinOpInfo &Op) {
396 : llvm::Value *ResR, *ResI;
397 :
24: branch 2 taken
11: branch 3 taken
398 35: if (Op.LHS.first->getType()->isFloatingPoint()) {
399 24: ResR = Builder.CreateFAdd(Op.LHS.first, Op.RHS.first, "add.r");
400 24: ResI = Builder.CreateFAdd(Op.LHS.second, Op.RHS.second, "add.i");
401 : } else {
402 11: ResR = Builder.CreateAdd(Op.LHS.first, Op.RHS.first, "add.r");
403 11: ResI = Builder.CreateAdd(Op.LHS.second, Op.RHS.second, "add.i");
404 : }
405 35: return ComplexPairTy(ResR, ResI);
406 : }
407 :
408 2: ComplexPairTy ComplexExprEmitter::EmitBinSub(const BinOpInfo &Op) {
409 : llvm::Value *ResR, *ResI;
1: branch 2 taken
1: branch 3 taken
410 2: if (Op.LHS.first->getType()->isFloatingPoint()) {
411 1: ResR = Builder.CreateFSub(Op.LHS.first, Op.RHS.first, "sub.r");
412 1: ResI = Builder.CreateFSub(Op.LHS.second, Op.RHS.second, "sub.i");
413 : } else {
414 1: ResR = Builder.CreateSub(Op.LHS.first, Op.RHS.first, "sub.r");
415 1: ResI = Builder.CreateSub(Op.LHS.second, Op.RHS.second, "sub.i");
416 : }
417 2: return ComplexPairTy(ResR, ResI);
418 : }
419 :
420 :
421 6: ComplexPairTy ComplexExprEmitter::EmitBinMul(const BinOpInfo &Op) {
422 : using llvm::Value;
423 : Value *ResR, *ResI;
424 :
5: branch 2 taken
1: branch 3 taken
425 6: if (Op.LHS.first->getType()->isFloatingPoint()) {
426 5: Value *ResRl = Builder.CreateFMul(Op.LHS.first, Op.RHS.first, "mul.rl");
427 5: Value *ResRr = Builder.CreateFMul(Op.LHS.second, Op.RHS.second,"mul.rr");
428 5: ResR = Builder.CreateFSub(ResRl, ResRr, "mul.r");
429 :
430 5: Value *ResIl = Builder.CreateFMul(Op.LHS.second, Op.RHS.first, "mul.il");
431 5: Value *ResIr = Builder.CreateFMul(Op.LHS.first, Op.RHS.second, "mul.ir");
432 5: ResI = Builder.CreateFAdd(ResIl, ResIr, "mul.i");
433 : } else {
434 1: Value *ResRl = Builder.CreateMul(Op.LHS.first, Op.RHS.first, "mul.rl");
435 1: Value *ResRr = Builder.CreateMul(Op.LHS.second, Op.RHS.second,"mul.rr");
436 1: ResR = Builder.CreateSub(ResRl, ResRr, "mul.r");
437 :
438 1: Value *ResIl = Builder.CreateMul(Op.LHS.second, Op.RHS.first, "mul.il");
439 1: Value *ResIr = Builder.CreateMul(Op.LHS.first, Op.RHS.second, "mul.ir");
440 1: ResI = Builder.CreateAdd(ResIl, ResIr, "mul.i");
441 : }
442 6: return ComplexPairTy(ResR, ResI);
443 : }
444 :
445 2: ComplexPairTy ComplexExprEmitter::EmitBinDiv(const BinOpInfo &Op) {
446 2: llvm::Value *LHSr = Op.LHS.first, *LHSi = Op.LHS.second;
447 2: llvm::Value *RHSr = Op.RHS.first, *RHSi = Op.RHS.second;
448 :
449 :
450 : llvm::Value *DSTr, *DSTi;
1: branch 2 taken
1: branch 3 taken
451 2: if (Op.LHS.first->getType()->isFloatingPoint()) {
452 : // (a+ib) / (c+id) = ((ac+bd)/(cc+dd)) + i((bc-ad)/(cc+dd))
453 1: llvm::Value *Tmp1 = Builder.CreateFMul(LHSr, RHSr, "tmp"); // a*c
454 1: llvm::Value *Tmp2 = Builder.CreateFMul(LHSi, RHSi, "tmp"); // b*d
455 1: llvm::Value *Tmp3 = Builder.CreateFAdd(Tmp1, Tmp2, "tmp"); // ac+bd
456 :
457 1: llvm::Value *Tmp4 = Builder.CreateFMul(RHSr, RHSr, "tmp"); // c*c
458 1: llvm::Value *Tmp5 = Builder.CreateFMul(RHSi, RHSi, "tmp"); // d*d
459 1: llvm::Value *Tmp6 = Builder.CreateFAdd(Tmp4, Tmp5, "tmp"); // cc+dd
460 :
461 1: llvm::Value *Tmp7 = Builder.CreateFMul(LHSi, RHSr, "tmp"); // b*c
462 1: llvm::Value *Tmp8 = Builder.CreateFMul(LHSr, RHSi, "tmp"); // a*d
463 1: llvm::Value *Tmp9 = Builder.CreateFSub(Tmp7, Tmp8, "tmp"); // bc-ad
464 :
465 1: DSTr = Builder.CreateFDiv(Tmp3, Tmp6, "tmp");
466 1: DSTi = Builder.CreateFDiv(Tmp9, Tmp6, "tmp");
467 : } else {
468 : // (a+ib) / (c+id) = ((ac+bd)/(cc+dd)) + i((bc-ad)/(cc+dd))
469 1: llvm::Value *Tmp1 = Builder.CreateMul(LHSr, RHSr, "tmp"); // a*c
470 1: llvm::Value *Tmp2 = Builder.CreateMul(LHSi, RHSi, "tmp"); // b*d
471 1: llvm::Value *Tmp3 = Builder.CreateAdd(Tmp1, Tmp2, "tmp"); // ac+bd
472 :
473 1: llvm::Value *Tmp4 = Builder.CreateMul(RHSr, RHSr, "tmp"); // c*c
474 1: llvm::Value *Tmp5 = Builder.CreateMul(RHSi, RHSi, "tmp"); // d*d
475 1: llvm::Value *Tmp6 = Builder.CreateAdd(Tmp4, Tmp5, "tmp"); // cc+dd
476 :
477 1: llvm::Value *Tmp7 = Builder.CreateMul(LHSi, RHSr, "tmp"); // b*c
478 1: llvm::Value *Tmp8 = Builder.CreateMul(LHSr, RHSi, "tmp"); // a*d
479 1: llvm::Value *Tmp9 = Builder.CreateSub(Tmp7, Tmp8, "tmp"); // bc-ad
480 :
0: branch 5 not taken
1: branch 6 taken
481 1: if (Op.Ty->getAs<ComplexType>()->getElementType()->isUnsignedIntegerType()) {
482 0: DSTr = Builder.CreateUDiv(Tmp3, Tmp6, "tmp");
483 0: DSTi = Builder.CreateUDiv(Tmp9, Tmp6, "tmp");
484 : } else {
485 1: DSTr = Builder.CreateSDiv(Tmp3, Tmp6, "tmp");
486 1: DSTi = Builder.CreateSDiv(Tmp9, Tmp6, "tmp");
487 : }
488 : }
489 :
490 2: return ComplexPairTy(DSTr, DSTi);
491 : }
492 :
493 : ComplexExprEmitter::BinOpInfo
494 39: ComplexExprEmitter::EmitBinOps(const BinaryOperator *E) {
495 39: TestAndClearIgnoreReal();
496 39: TestAndClearIgnoreImag();
497 39: TestAndClearIgnoreRealAssign();
498 39: TestAndClearIgnoreImagAssign();
499 39: BinOpInfo Ops;
500 39: Ops.LHS = Visit(E->getLHS());
501 39: Ops.RHS = Visit(E->getRHS());
502 39: Ops.Ty = E->getType();
503 : return Ops;
504 : }
505 :
506 :
507 : // Compound assignments.
508 : ComplexPairTy ComplexExprEmitter::
509 : EmitCompoundAssign(const CompoundAssignOperator *E,
510 6: ComplexPairTy (ComplexExprEmitter::*Func)(const BinOpInfo&)){
511 6: TestAndClearIgnoreReal();
512 6: TestAndClearIgnoreImag();
513 6: bool ignreal = TestAndClearIgnoreRealAssign();
514 6: bool ignimag = TestAndClearIgnoreImagAssign();
515 6: QualType LHSTy = E->getLHS()->getType(), RHSTy = E->getRHS()->getType();
516 :
517 6: BinOpInfo OpInfo;
518 :
519 : // Load the RHS and LHS operands.
520 : // __block variables need to have the rhs evaluated first, plus this should
521 : // improve codegen a little. It is possible for the RHS to be complex or
522 : // scalar.
523 6: OpInfo.Ty = E->getComputationResultType();
524 6: OpInfo.RHS = EmitCast(E->getRHS(), OpInfo.Ty);
525 :
526 6: LValue LHSLV = CGF.EmitLValue(E->getLHS());
527 :
528 :
529 : // We know the LHS is a complex lvalue.
530 6: OpInfo.LHS=EmitLoadOfComplex(LHSLV.getAddress(), LHSLV.isVolatileQualified());
531 6: OpInfo.LHS=EmitComplexToComplexCast(OpInfo.LHS, LHSTy, OpInfo.Ty);
532 :
533 : // Expand the binary operator.
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534 6: ComplexPairTy Result = (this->*Func)(OpInfo);
535 :
536 : // Truncate the result back to the LHS type.
537 6: Result = EmitComplexToComplexCast(Result, OpInfo.Ty, LHSTy);
538 :
539 : // Store the result value into the LHS lvalue.
540 6: EmitStoreOfComplex(Result, LHSLV.getAddress(), LHSLV.isVolatileQualified());
541 : // And now return the LHS
542 6: IgnoreReal = ignreal;
543 6: IgnoreImag = ignimag;
544 6: IgnoreRealAssign = ignreal;
545 6: IgnoreImagAssign = ignimag;
546 6: return EmitLoadOfComplex(LHSLV.getAddress(), LHSLV.isVolatileQualified());
547 : }
548 :
549 37: ComplexPairTy ComplexExprEmitter::VisitBinAssign(const BinaryOperator *E) {
550 37: TestAndClearIgnoreReal();
551 37: TestAndClearIgnoreImag();
552 37: bool ignreal = TestAndClearIgnoreRealAssign();
553 37: bool ignimag = TestAndClearIgnoreImagAssign();
554 : assert(CGF.getContext().getCanonicalType(E->getLHS()->getType()) ==
555 : CGF.getContext().getCanonicalType(E->getRHS()->getType()) &&
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556 37: "Invalid assignment");
557 : // Emit the RHS.
558 37: ComplexPairTy Val = Visit(E->getRHS());
559 :
560 : // Compute the address to store into.
561 37: LValue LHS = CGF.EmitLValue(E->getLHS());
562 :
563 : // Store into it, if simple.
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564 37: if (LHS.isSimple()) {
565 33: EmitStoreOfComplex(Val, LHS.getAddress(), LHS.isVolatileQualified());
566 :
567 : // And now return the LHS
568 33: IgnoreReal = ignreal;
569 33: IgnoreImag = ignimag;
570 33: IgnoreRealAssign = ignreal;
571 33: IgnoreImagAssign = ignimag;
572 33: return EmitLoadOfComplex(LHS.getAddress(), LHS.isVolatileQualified());
573 : }
574 :
575 : // Otherwise we must have a property setter (no complex vector/bitfields).
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576 4: if (LHS.isPropertyRef())
577 2: CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), RValue::getComplex(Val));
578 : else
579 2: CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), RValue::getComplex(Val));
580 :
581 : // There is no reload after a store through a method, but we need to restore
582 : // the Ignore* flags.
583 4: IgnoreReal = ignreal;
584 4: IgnoreImag = ignimag;
585 4: IgnoreRealAssign = ignreal;
586 4: IgnoreImagAssign = ignimag;
587 4: return Val;
588 : }
589 :
590 0: ComplexPairTy ComplexExprEmitter::VisitBinComma(const BinaryOperator *E) {
591 0: CGF.EmitStmt(E->getLHS());
592 0: CGF.EnsureInsertPoint();
593 0: return Visit(E->getRHS());
594 : }
595 :
596 : ComplexPairTy ComplexExprEmitter::
597 5: VisitConditionalOperator(const ConditionalOperator *E) {
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598 5: if (!E->getLHS()) {
599 0: CGF.ErrorUnsupported(E, "conditional operator with missing LHS");
600 : const llvm::Type *EltTy =
601 0: CGF.ConvertType(E->getType()->getAs<ComplexType>()->getElementType());
602 0: llvm::Value *U = llvm::UndefValue::get(EltTy);
603 0: return ComplexPairTy(U, U);
604 : }
605 :
606 5: TestAndClearIgnoreReal();
607 5: TestAndClearIgnoreImag();
608 5: TestAndClearIgnoreRealAssign();
609 5: TestAndClearIgnoreImagAssign();
610 5: llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true");
611 5: llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false");
612 5: llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end");
613 :
614 5: CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock);
615 :
616 5: CGF.EmitBlock(LHSBlock);
617 :
618 : // Handle the GNU extension for missing LHS.
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619 5: assert(E->getLHS() && "Must have LHS for complex value");
620 :
621 5: ComplexPairTy LHS = Visit(E->getLHS());
622 5: LHSBlock = Builder.GetInsertBlock();
623 5: CGF.EmitBranch(ContBlock);
624 :
625 5: CGF.EmitBlock(RHSBlock);
626 :
627 5: ComplexPairTy RHS = Visit(E->getRHS());
628 5: RHSBlock = Builder.GetInsertBlock();
629 5: CGF.EmitBranch(ContBlock);
630 :
631 5: CGF.EmitBlock(ContBlock);
632 :
633 : // Create a PHI node for the real part.
634 5: llvm::PHINode *RealPN = Builder.CreatePHI(LHS.first->getType(), "cond.r");
635 5: RealPN->reserveOperandSpace(2);
636 5: RealPN->addIncoming(LHS.first, LHSBlock);
637 5: RealPN->addIncoming(RHS.first, RHSBlock);
638 :
639 : // Create a PHI node for the imaginary part.
640 5: llvm::PHINode *ImagPN = Builder.CreatePHI(LHS.first->getType(), "cond.i");
641 5: ImagPN->reserveOperandSpace(2);
642 5: ImagPN->addIncoming(LHS.second, LHSBlock);
643 5: ImagPN->addIncoming(RHS.second, RHSBlock);
644 :
645 5: return ComplexPairTy(RealPN, ImagPN);
646 : }
647 :
648 0: ComplexPairTy ComplexExprEmitter::VisitChooseExpr(ChooseExpr *E) {
649 0: return Visit(E->getChosenSubExpr(CGF.getContext()));
650 : }
651 :
652 1: ComplexPairTy ComplexExprEmitter::VisitInitListExpr(InitListExpr *E) {
653 1: bool Ignore = TestAndClearIgnoreReal();
654 : (void)Ignore;
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655 1: assert (Ignore == false && "init list ignored");
656 1: Ignore = TestAndClearIgnoreImag();
657 : (void)Ignore;
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658 1: assert (Ignore == false && "init list ignored");
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659 1: if (E->getNumInits())
660 1: return Visit(E->getInit(0));
661 :
662 : // Empty init list intializes to null
663 0: QualType Ty = E->getType()->getAs<ComplexType>()->getElementType();
664 0: const llvm::Type* LTy = CGF.ConvertType(Ty);
665 0: llvm::Value* zeroConstant = llvm::Constant::getNullValue(LTy);
666 0: return ComplexPairTy(zeroConstant, zeroConstant);
667 : }
668 :
669 0: ComplexPairTy ComplexExprEmitter::VisitVAArgExpr(VAArgExpr *E) {
670 0: llvm::Value *ArgValue = CGF.EmitVAListRef(E->getSubExpr());
671 0: llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, E->getType());
672 :
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673 0: if (!ArgPtr) {
674 0: CGF.ErrorUnsupported(E, "complex va_arg expression");
675 : const llvm::Type *EltTy =
676 0: CGF.ConvertType(E->getType()->getAs<ComplexType>()->getElementType());
677 0: llvm::Value *U = llvm::UndefValue::get(EltTy);
678 0: return ComplexPairTy(U, U);
679 : }
680 :
681 : // FIXME Volatility.
682 0: return EmitLoadOfComplex(ArgPtr, false);
683 : }
684 :
685 : //===----------------------------------------------------------------------===//
686 : // Entry Point into this File
687 : //===----------------------------------------------------------------------===//
688 :
689 : /// EmitComplexExpr - Emit the computation of the specified expression of
690 : /// complex type, ignoring the result.
691 : ComplexPairTy CodeGenFunction::EmitComplexExpr(const Expr *E, bool IgnoreReal,
692 133: bool IgnoreImag, bool IgnoreRealAssign, bool IgnoreImagAssign) {
693 : assert(E && E->getType()->isAnyComplexType() &&
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694 133: "Invalid complex expression to emit");
695 :
696 : return ComplexExprEmitter(*this, IgnoreReal, IgnoreImag, IgnoreRealAssign,
697 : IgnoreImagAssign)
698 133: .Visit(const_cast<Expr*>(E));
699 : }
700 :
701 : /// EmitComplexExprIntoAddr - Emit the computation of the specified expression
702 : /// of complex type, storing into the specified Value*.
703 : void CodeGenFunction::EmitComplexExprIntoAddr(const Expr *E,
704 : llvm::Value *DestAddr,
705 36: bool DestIsVolatile) {
706 : assert(E && E->getType()->isAnyComplexType() &&
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707 36: "Invalid complex expression to emit");
708 36: ComplexExprEmitter Emitter(*this);
709 36: ComplexPairTy Val = Emitter.Visit(const_cast<Expr*>(E));
710 36: Emitter.EmitStoreOfComplex(Val, DestAddr, DestIsVolatile);
711 36: }
712 :
713 : /// StoreComplexToAddr - Store a complex number into the specified address.
714 : void CodeGenFunction::StoreComplexToAddr(ComplexPairTy V,
715 : llvm::Value *DestAddr,
716 36: bool DestIsVolatile) {
717 36: ComplexExprEmitter(*this).EmitStoreOfComplex(V, DestAddr, DestIsVolatile);
718 36: }
719 :
720 : /// LoadComplexFromAddr - Load a complex number from the specified address.
721 : ComplexPairTy CodeGenFunction::LoadComplexFromAddr(llvm::Value *SrcAddr,
722 31: bool SrcIsVolatile) {
723 31: return ComplexExprEmitter(*this).EmitLoadOfComplex(SrcAddr, SrcIsVolatile);
724 : }
Generated: 2010-02-10 01:31 by zcov