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-rw-r--r--CodeGen/CGExpr.cpp7
-rw-r--r--CodeGen/CodeGenFunction.h3
-rw-r--r--test/CodeGen/func-return-member.c23
3 files changed, 33 insertions, 0 deletions
diff --git a/CodeGen/CGExpr.cpp b/CodeGen/CGExpr.cpp
index 4cb897fe5d..84879bb28e 100644
--- a/CodeGen/CGExpr.cpp
+++ b/CodeGen/CGExpr.cpp
@@ -87,6 +87,7 @@ LValue CodeGenFunction::EmitLValue(const Expr *E) {
return LValue::MakeAddr(llvm::UndefValue::get(Ty));
}
+ case Expr::CallExprClass: return EmitCallExprLValue(cast<CallExpr>(E));
case Expr::DeclRefExprClass: return EmitDeclRefLValue(cast<DeclRefExpr>(E));
case Expr::ParenExprClass:return EmitLValue(cast<ParenExpr>(E)->getSubExpr());
case Expr::PreDefinedExprClass:
@@ -455,6 +456,12 @@ RValue CodeGenFunction::EmitCallExpr(const CallExpr *E) {
return EmitCallExpr(Callee, E);
}
+LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) {
+ // Can only get l-value for call expression returning aggregate type
+ RValue RV = EmitCallExpr(E);
+ return LValue::MakeAddr(RV.getAggregateAddr());
+}
+
RValue CodeGenFunction::EmitCallExpr(llvm::Value *Callee, const CallExpr *E) {
// The callee type will always be a pointer to function type, get the function
// type.
diff --git a/CodeGen/CodeGenFunction.h b/CodeGen/CodeGenFunction.h
index 3b51d43de9..40c7414b98 100644
--- a/CodeGen/CodeGenFunction.h
+++ b/CodeGen/CodeGenFunction.h
@@ -371,6 +371,9 @@ public:
/// is 'Ty'.
void EmitStoreThroughLValue(RValue Src, LValue Dst, QualType Ty);
void EmitStoreThroughOCUComponentLValue(RValue Src, LValue Dst, QualType Ty);
+
+ // Note: only availabe for agg return types
+ LValue EmitCallExprLValue(const CallExpr *E);
LValue EmitDeclRefLValue(const DeclRefExpr *E);
LValue EmitStringLiteralLValue(const StringLiteral *E);
diff --git a/test/CodeGen/func-return-member.c b/test/CodeGen/func-return-member.c
new file mode 100644
index 0000000000..f31a53afce
--- /dev/null
+++ b/test/CodeGen/func-return-member.c
@@ -0,0 +1,23 @@
+// RUN: clang -emit-llvm < %s 2>&1 | not grep 'cannot codegen this l-value expression yet'
+
+struct frk { float _Complex c; int x; };
+struct faz { struct frk f; };
+struct fuz { struct faz f; };
+
+extern struct fuz foo(void);
+
+int X;
+struct frk F;
+float _Complex C;
+
+void bar(void) {
+ X = foo().f.f.x;
+}
+
+void bun(void) {
+ F = foo().f.f;
+}
+
+void ban(void) {
+ C = foo().f.f.c;
+}