implement codegen for --/++
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41255 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CGComplexExpr.cpp b/CodeGen/CGComplexExpr.cpp
index f62a315..174748a 100644
--- a/CodeGen/CGComplexExpr.cpp
+++ b/CodeGen/CGComplexExpr.cpp
@@ -74,6 +74,21 @@
ComplexPairTy VisitArraySubscriptExpr(Expr *E) { return EmitLoadOfLValue(E); }
// Operators.
+ ComplexPairTy VisitPrePostIncDec(const UnaryOperator *E,
+ bool isInc, bool isPre);
+ ComplexPairTy VisitUnaryPostDec(const UnaryOperator *E) {
+ return VisitPrePostIncDec(E, false, false);
+ }
+ ComplexPairTy VisitUnaryPostInc(const UnaryOperator *E) {
+ return VisitPrePostIncDec(E, true, false);
+ }
+ ComplexPairTy VisitUnaryPreDec(const UnaryOperator *E) {
+ return VisitPrePostIncDec(E, false, true);
+ }
+ ComplexPairTy VisitUnaryPreInc(const UnaryOperator *E) {
+ return VisitPrePostIncDec(E, true, true);
+ }
+ ComplexPairTy VisitUnaryDeref(const Expr *E) { return EmitLoadOfLValue(E); }
ComplexPairTy VisitUnaryPlus (const UnaryOperator *E) {
return Visit(E->getSubExpr());
}
@@ -152,6 +167,33 @@
return ComplexPairTy(U, U);
}
+ComplexPairTy ComplexExprEmitter::VisitPrePostIncDec(const UnaryOperator *E,
+ bool isInc, bool isPre) {
+ LValue LV = CGF.EmitLValue(E->getSubExpr());
+ // FIXME: Handle volatile!
+ ComplexPairTy InVal = EmitLoadOfComplex(LV.getAddress(), false);
+
+ int AmountVal = isInc ? 1 : -1;
+
+ llvm::Value *NextVal;
+ if (isa<llvm::IntegerType>(InVal.first->getType()))
+ NextVal = llvm::ConstantInt::get(InVal.first->getType(), AmountVal);
+ else
+ NextVal = llvm::ConstantFP::get(InVal.first->getType(), AmountVal);
+
+ // Add the inc/dec to the real part.
+ NextVal = Builder.CreateAdd(InVal.first, NextVal, isInc ? "inc" : "dec");
+
+ ComplexPairTy IncVal(NextVal, InVal.second);
+
+ // Store the updated result through the lvalue.
+ EmitStoreOfComplex(IncVal, LV.getAddress(), false); /* FIXME: Volatile */
+
+ // If this is a postinc, return the value read from memory, otherwise use the
+ // updated value.
+ return isPre ? IncVal : InVal;
+}
+
ComplexPairTy ComplexExprEmitter::VisitUnaryMinus(const UnaryOperator *E) {
ComplexPairTy Op = Visit(E->getSubExpr());
llvm::Value *ResR = Builder.CreateNeg(Op.first, "neg.r");