[PATCH] C99 partial re-initialization behavior (DR-253)

[Richard Smith]

The right way to deal with this is to expand initializers like `{ "foo" }` to `{ 'f', 'o', 'o' }` in the structured form of the `InitListExpr` if a designator tries to replace an element of the list.

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Comment at: llvm/tools/clang/include/clang/AST/Expr.h:3784
@@ +3783,3 @@
+  // evaluation results will be stored into their PrevInitConstant members.
+  llvm::Constant *PrevInitConstant;
+  Expr *PrevInitExpr;
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This is a huge and unacceptable layering violation. It is not OK for the AST to refer to IR-level constructs.

http://reviews.llvm.org/D5789