Patched our local Clang to fix a crash when parsing

classes/structs that have variable-length arrays at
the end.

llvm-svn: 156026

lldb/scripts/clang.tail-padded-arrays.diff

@@ -0,0 +1,26 @@
+Index: lib/Sema/SemaChecking.cpp
+===================================================================
+--- lib/Sema/SemaChecking.cpp	(revision 152265)
++++ lib/Sema/SemaChecking.cpp	(working copy)
+@@ -4416,12 +4416,16 @@
+ 
+   // Don't consider sizes resulting from macro expansions or template argument
+   // substitution to form C89 tail-padded arrays.
+-  ConstantArrayTypeLoc TL =
+-    cast<ConstantArrayTypeLoc>(FD->getTypeSourceInfo()->getTypeLoc());
+-  const Expr *SizeExpr = dyn_cast<IntegerLiteral>(TL.getSizeExpr());
+-  if (!SizeExpr || SizeExpr->getExprLoc().isMacroID())
+-    return false;
+ 
++  TypeSourceInfo *TInfo = FD->getTypeSourceInfo();
++  if (TInfo) {
++    ConstantArrayTypeLoc TL =
++      cast<ConstantArrayTypeLoc>(TInfo->getTypeLoc());
++    const Expr *SizeExpr = dyn_cast<IntegerLiteral>(TL.getSizeExpr());
++    if (!SizeExpr || SizeExpr->getExprLoc().isMacroID())
++      return false;
++  }
++
+   const RecordDecl *RD = dyn_cast<RecordDecl>(FD->getDeclContext());
+   if (!RD) return false;
+   if (RD->isUnion()) return false;