Support compound complex operations as l-values in C++. Add a test

case based on CodeGen/volatile-1.c which tests the current C++
semantics, and note the many, many places we fall short of them.

llvm-svn: 119402

1 files changed, 23 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGExprComplex.cpp b/clang/lib/CodeGen/CGExprComplex.cpp
index df65d5a3ac9..26bda79898b 100644
--- a/clang/lib/CodeGen/CGExprComplex.cpp
+++ b/clang/lib/CodeGen/CGExprComplex.cpp
@@ -760,3 +760,26 @@ ComplexPairTy CodeGenFunction::LoadComplexFromAddr(llvm::Value *SrcAddr,
                                                    bool SrcIsVolatile) {
   return ComplexExprEmitter(*this).EmitLoadOfComplex(SrcAddr, SrcIsVolatile);
 }
+
+LValue CodeGenFunction::EmitComplexAssignmentLValue(const BinaryOperator *E) {
+  ComplexPairTy Val; // ignored
+
+  ComplexPairTy(ComplexExprEmitter::*Op)(const ComplexExprEmitter::BinOpInfo &);
+
+  switch (E->getOpcode()) {
+  case BO_Assign:
+    return ComplexExprEmitter(*this).EmitBinAssignLValue(E, Val);
+
+  case BO_MulAssign: Op = &ComplexExprEmitter::EmitBinMul; break;
+  case BO_DivAssign: Op = &ComplexExprEmitter::EmitBinDiv; break;
+  case BO_SubAssign: Op = &ComplexExprEmitter::EmitBinSub; break;
+  case BO_AddAssign: Op = &ComplexExprEmitter::EmitBinAdd; break;
+
+  default:
+    llvm_unreachable("unexpected complex compound assignment");
+    Op = 0;
+  }
+
+  return ComplexExprEmitter(*this).EmitCompoundAssignLValue(
+                                   cast<CompoundAssignOperator>(E), Op, Val);
+}