Add list initialization for complex numbers in C. Essentially, this allows "_Complex float x = {1.0f, 2.0f};". See changes to docs/LanguageExtensions.html for a longer description.

<rdar://problem/9397672>.

llvm-svn: 140090

1 files changed, 8 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CGExprComplex.cpp b/clang/lib/CodeGen/CGExprComplex.cpp
index 5a752a1830d..a92a7ad33e8 100644
--- a/clang/lib/CodeGen/CGExprComplex.cpp
+++ b/clang/lib/CodeGen/CGExprComplex.cpp
@@ -738,10 +738,17 @@ ComplexPairTy ComplexExprEmitter::VisitInitListExpr(InitListExpr *E) {
     Ignore = TestAndClearIgnoreImag();
     (void)Ignore;
     assert (Ignore == false && "init list ignored");
-  if (E->getNumInits())
+
+  if (E->getNumInits() == 2) {
+    llvm::Value *Real = CGF.EmitScalarExpr(E->getInit(0));
+    llvm::Value *Imag = CGF.EmitScalarExpr(E->getInit(1));
+    return ComplexPairTy(Real, Imag);
+  } else if (E->getNumInits() == 1) {
     return Visit(E->getInit(0));
+  }
 
   // Empty init list intializes to null
+  assert(E->getNumInits() == 0 && "Unexpected number of inits");
   QualType Ty = E->getType()->getAs<ComplexType>()->getElementType();
   llvm::Type* LTy = CGF.ConvertType(Ty);
   llvm::Value* zeroConstant = llvm::Constant::getNullValue(LTy);