implement conversions from complex to scalar types.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41439 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CGExprScalar.cpp b/CodeGen/CGExprScalar.cpp
index deaf0a8..ebe25c5 100644
--- a/CodeGen/CGExprScalar.cpp
+++ b/CodeGen/CGExprScalar.cpp
@@ -251,6 +251,8 @@
SrcType = SrcType.getCanonicalType();
DstType = DstType.getCanonicalType();
if (SrcType == DstType) return Src;
+
+ if (DstType->isVoidType()) return 0;
// Handle conversions to bool first, they are special: comparisons against 0.
if (const BuiltinType *DestBT = dyn_cast<BuiltinType>(DstType))
@@ -367,13 +369,20 @@
if (!CGF.hasAggregateLLVMType(E->getType())) {
Value *Src = Visit(const_cast<Expr*>(E));
- // If the destination is void, just evaluate the source.
- if (DestTy->isVoidType()) return 0;
-
// Use EmitScalarConversion to perform the conversion.
return EmitScalarConversion(Src, E->getType(), DestTy);
}
+ if (const ComplexType *CT = E->getType()->getAsComplexType()) {
+ // Emit the complex value, only keeping the real component. C99 6.3.1.7p2:
+ // "When a value of complex type is converted to a real type, the imaginary
+ // part of the complex value is discarded and the value of the real part is
+ // converted according to the conversion rules for the corresponding real
+ // type.
+ Value *Src = CGF.EmitComplexExpr(E).first;
+ return EmitScalarConversion(Src, CT->getElementType(), DestTy);
+ }
+
RValue Src = CGF.EmitAnyExpr(E);
// If the destination is void, just evaluate the source.