Fix rdar://6880874 - [sema] crash on array types with different index sizes

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71634 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index ac46180b94..ccd3762da0 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -1133,9 +1133,14 @@ QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls)
 /// getConstantArrayType - Return the unique reference to the type for an 
 /// array of the specified element type.
 QualType ASTContext::getConstantArrayType(QualType EltTy, 
-                                          const llvm::APInt &ArySize,
+                                          const llvm::APInt &ArySizeIn,
                                           ArrayType::ArraySizeModifier ASM,
                                           unsigned EltTypeQuals) {
+  // Convert the array size into a canonical width matching the pointer size for
+  // the target.
+  llvm::APInt ArySize(ArySizeIn);
+  ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace()));
+  
   llvm::FoldingSetNodeID ID;
   ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals);