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Added pragma shufflevector.

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This commit is contained in:
Jernej Krempuš
2012-08-05 18:51:49 +02:00
parent 3d108ee684
commit 100907ffa2
4 changed files with 46 additions and 1 deletions
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22
gen/toir.cpp
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@@ -947,8 +947,28 @@ DValue* CallExp::toElem(IRState* p)
if (expv->getType()->toBasetype()->ty != Tint32)
expv = DtoCast(loc, expv, Type::tint32);
return new DImValue(type, p->ir->CreateAlloca(LLType::getInt8Ty(gIR->context()), expv->getRVal(), ".alloca"));
}
// shufflevector
else if (fndecl->llvmInternal == LLVMshufflevector) {
llvm::SmallVector<llvm::Constant*, 32> mask;
for(int i = 2, n = arguments->dim; i < n; i++){
Expression* exp = static_cast<Expression*>(arguments->data[i]);
if(exp->op != TOKint64){
error("Function %s was declared with pragma shufflevector. Because of that all of its arguments except the first two must be integer literals.", f->toChars());
fatal();
}
IntegerExp* iexp = static_cast<IntegerExp*>(arguments->data[i]);
mask.push_back(iexp->toConstElem(p));
}
LLValue* maskVal = llvm::ConstantVector::get(mask);
Expression* exp1 = static_cast<Expression*>(arguments->data[0]);
Expression* exp2 = static_cast<Expression*>(arguments->data[1]);
LLValue* v1 = exp1->toElem(p)->getRVal();
LLValue* v2 = exp2->toElem(p)->getRVal();
return new DImValue(type, p->ir->CreateShuffleVector(v1, v2, maskVal));
}
// fence instruction
} else if (fndecl->llvmInternal == LLVMfence) {
else if (fndecl->llvmInternal == LLVMfence) {
if (arguments->dim != 1) {
error("fence instruction expects 1 arguments");
return NULL;