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From: Dimitry Andric <dim@FreeBSD.org>
Date: Sun, 27 May 2012 13:33:54 +0000 (UTC)
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Subject: svn commit: r236149 - head/contrib/llvm/tools/clang/lib/CodeGen
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Author: dim
Date: Sun May 27 13:33:54 2012
New Revision: 236149
URL: http://svn.freebsd.org/changeset/base/236149

Log:
  Pull in r157212 from upstream clang trunk:
  
    Revert r115805. An array type is required to have a range type,
    however, the range can be unknown for the upper bound.
  
    Testcase to follow.
  
    Part of rdar://11457152
  
  This should fix ctfconvert producing error messages during kernel
  builds, similar to:
  
    ERROR: scsi_all.c: die 24561: failed to retrieve array bounds
  
  These were caused by incorrect debug information for flexible array
  members of structs.
  
  MFC after:	3 days

Modified:
  head/contrib/llvm/tools/clang/lib/CodeGen/CGDebugInfo.cpp

Modified: head/contrib/llvm/tools/clang/lib/CodeGen/CGDebugInfo.cpp
==============================================================================
--- head/contrib/llvm/tools/clang/lib/CodeGen/CGDebugInfo.cpp	Sun May 27 12:54:41 2012	(r236148)
+++ head/contrib/llvm/tools/clang/lib/CodeGen/CGDebugInfo.cpp	Sun May 27 13:33:54 2012	(r236149)
@@ -1479,25 +1479,21 @@ llvm::DIType CGDebugInfo::CreateType(con
   // obvious/recursive way?
   SmallVector<llvm::Value *, 8> Subscripts;
   QualType EltTy(Ty, 0);
-  if (Ty->isIncompleteArrayType())
+  while ((Ty = dyn_cast<ArrayType>(EltTy))) {
+    int64_t UpperBound = 0;
+    int64_t LowerBound = 0;
+    if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(Ty)) {
+      if (CAT->getSize().getZExtValue())
+        UpperBound = CAT->getSize().getZExtValue() - 1;
+    } else
+      // This is an unbounded array. Use Low = 1, Hi = 0 to express such 
+      // arrays.
+      LowerBound = 1;
+    
+    // FIXME: Verify this is right for VLAs.
+    Subscripts.push_back(DBuilder.getOrCreateSubrange(LowerBound,
+                                                      UpperBound));
     EltTy = Ty->getElementType();
-  else {
-    while ((Ty = dyn_cast<ArrayType>(EltTy))) {
-      int64_t UpperBound = 0;
-      int64_t LowerBound = 0;
-      if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(Ty)) {
-        if (CAT->getSize().getZExtValue())
-          UpperBound = CAT->getSize().getZExtValue() - 1;
-      } else
-        // This is an unbounded array. Use Low = 1, Hi = 0 to express such 
-        // arrays.
-        LowerBound = 1;
-
-      // FIXME: Verify this is right for VLAs.
-      Subscripts.push_back(DBuilder.getOrCreateSubrange(LowerBound,
-                                                        UpperBound));
-      EltTy = Ty->getElementType();
-    }
   }
 
   llvm::DIArray SubscriptArray = DBuilder.getOrCreateArray(Subscripts);