Add lvalue-bitcast support for complex numbers.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@108363 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprComplex.cpp b/lib/CodeGen/CGExprComplex.cpp
index 995c9b5..0927319 100644
--- a/lib/CodeGen/CGExprComplex.cpp
+++ b/lib/CodeGen/CGExprComplex.cpp
@@ -131,14 +131,14 @@
// FIXME: CompoundLiteralExpr
- ComplexPairTy EmitCast(Expr *Op, QualType DestTy);
+ ComplexPairTy EmitCast(CastExpr::CastKind CK, Expr *Op, QualType DestTy);
ComplexPairTy VisitImplicitCastExpr(ImplicitCastExpr *E) {
// Unlike for scalars, we don't have to worry about function->ptr demotion
// here.
- return EmitCast(E->getSubExpr(), E->getType());
+ return EmitCast(E->getCastKind(), E->getSubExpr(), E->getType());
}
ComplexPairTy VisitCastExpr(CastExpr *E) {
- return EmitCast(E->getSubExpr(), E->getType());
+ return EmitCast(E->getCastKind(), E->getSubExpr(), E->getType());
}
ComplexPairTy VisitCallExpr(const CallExpr *E);
ComplexPairTy VisitStmtExpr(const StmtExpr *E);
@@ -339,11 +339,22 @@
return Val;
}
-ComplexPairTy ComplexExprEmitter::EmitCast(Expr *Op, QualType DestTy) {
+ComplexPairTy ComplexExprEmitter::EmitCast(CastExpr::CastKind CK, Expr *Op,
+ QualType DestTy) {
// Two cases here: cast from (complex to complex) and (scalar to complex).
if (Op->getType()->isAnyComplexType())
return EmitComplexToComplexCast(Visit(Op), Op->getType(), DestTy);
+ // FIXME: We should be looking at all of the cast kinds here, not
+ // cherry-picking the ones we have test cases for.
+ if (CK == CastExpr::CK_LValueBitCast) {
+ llvm::Value *V = CGF.EmitLValue(Op).getAddress();
+ V = Builder.CreateBitCast(V,
+ CGF.ConvertType(CGF.getContext().getPointerType(DestTy)));
+ // FIXME: Are the qualifiers correct here?
+ return EmitLoadOfComplex(V, DestTy.isVolatileQualified());
+ }
+
// C99 6.3.1.7: When a value of real type is converted to a complex type, the
// real part of the complex result value is determined by the rules of
// conversion to the corresponding real type and the imaginary part of the
@@ -521,7 +532,7 @@
// improve codegen a little. It is possible for the RHS to be complex or
// scalar.
OpInfo.Ty = E->getComputationResultType();
- OpInfo.RHS = EmitCast(E->getRHS(), OpInfo.Ty);
+ OpInfo.RHS = EmitCast(CastExpr::CK_Unknown, E->getRHS(), OpInfo.Ty);
LValue LHS = CGF.EmitLValue(E->getLHS());
// We know the LHS is a complex lvalue.