From 21f77cd0c3da8a1dbaf6245cae43baf4c0b80ea4 Mon Sep 17 00:00:00 2001
From: Argyrios Kyrtzidis <akyrtzi@gmail.com>
Date: Fri, 21 Oct 2011 23:02:22 +0000
Subject: [PATCH] Don't try to set the "array filler" in a InitListExpr twice.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@142695 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/AST/Expr.h | 4 ++++
 lib/AST/Expr.cpp         | 1 +
 lib/Sema/SemaInit.cpp    | 5 +++--
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/clang/AST/Expr.h b/include/clang/AST/Expr.h
index 9dda1e72da..e7b1a0593f 100644
--- a/include/clang/AST/Expr.h
+++ b/include/clang/AST/Expr.h
@@ -3400,6 +3400,10 @@ public:
   }
   void setArrayFiller(Expr *filler);
 
+  /// \brief Return true if this is an array initializer and its array "filler"
+  /// has been set.
+  bool hasArrayFiller() const { return getArrayFiller(); }
+
   /// \brief If this initializes a union, specifies which field in the
   /// union to initialize.
   ///
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 427c331ed0..96a8125e18 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -1394,6 +1394,7 @@ Expr *InitListExpr::updateInit(ASTContext &C, unsigned Init, Expr *expr) {
 }
 
 void InitListExpr::setArrayFiller(Expr *filler) {
+  assert(!hasArrayFiller() && "Filler already set!");
   ArrayFillerOrUnionFieldInit = filler;
   // Fill out any "holes" in the array due to designated initializers.
   Expr **inits = getInits();
diff --git a/lib/Sema/SemaInit.cpp b/lib/Sema/SemaInit.cpp
index 454a401665..59901cb11b 100644
--- a/lib/Sema/SemaInit.cpp
+++ b/lib/Sema/SemaInit.cpp
@@ -416,7 +416,8 @@ InitListChecker::FillInValueInitializations(const InitializedEntity &Entity,
         ElementEntity.getKind() == InitializedEntity::EK_VectorElement)
       ElementEntity.setElementIndex(Init);
 
-    if (Init >= NumInits || !ILE->getInit(Init)) {
+    Expr *InitExpr = (Init < NumInits ? ILE->getInit(Init) : 0);
+    if (!InitExpr && !ILE->hasArrayFiller()) {
       InitializationKind Kind = InitializationKind::CreateValue(Loc, Loc, Loc,
                                                                 true);
       InitializationSequence InitSeq(SemaRef, ElementEntity, Kind, 0, 0);
@@ -460,7 +461,7 @@ InitListChecker::FillInValueInitializations(const InitializedEntity &Entity,
         }
       }
     } else if (InitListExpr *InnerILE
-                 = dyn_cast<InitListExpr>(ILE->getInit(Init)))
+                 = dyn_cast_or_null<InitListExpr>(InitExpr))
       FillInValueInitializations(ElementEntity, InnerILE, RequiresSecondPass);
   }
 }
-- 
2.50.1