Emit an error noting that Clang does not support code generation for
the ternary operator without a left-hand side in C++ (PR7726), from
Jean-Daniel Dupas!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111809 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index 4487f17..49deb7b 100644
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -2058,7 +2058,12 @@
return Builder.CreateSelect(CondV, LHS, RHS, "cond");
}
-
+ if (!E->getLHS() && CGF.getContext().getLangOptions().CPlusPlus) {
+ // Does not support GNU missing condition extension in C++ yet (see #7726)
+ CGF.ErrorUnsupported(E, "conditional operator with missing LHS");
+ return llvm::UndefValue::get(ConvertType(E->getType()));
+ }
+
llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true");
llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false");
llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end");