[llvm-commits] [llvm-gcc-4.2] r46210 - /llvm-gcc-4.2/trunk/gcc/llvm-types.cpp

[Devang Patel]

Author: dpatel
Date: Mon Jan 21 13:29:51 2008
New Revision: 46210

URL: http://llvm.org/viewvc/llvm-project?rev=46210&view=rev
Log:
Used packed struct for

typedef double Al1Double __attribute__((aligned(1)));
struct x { int a:23; Al1Double v; };

test case : 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20080121/057396.html

Modified:
    llvm-gcc-4.2/trunk/gcc/llvm-types.cpp

Modified: llvm-gcc-4.2/trunk/gcc/llvm-types.cpp
URL: 
http://llvm.org/viewvc/llvm-project/llvm-gcc-4.2/trunk/gcc/llvm-types.cpp?rev=46210&r1=46209&r2=46210&view=diff

==============================================================================
--- llvm-gcc-4.2/trunk/gcc/llvm-types.cpp (original)
+++ llvm-gcc-4.2/trunk/gcc/llvm-types.cpp Mon Jan 21 13:29:51 2008
@@ -1260,6 +1260,8 @@
     ExtraBitsAvailable = E;
   }
 
+  bool isPacked() { return Packed; }
+
   void markAsPacked() {
     Packed = true;
   }
@@ -1793,7 +1795,15 @@
     // ordering.  Therefore convert to a packed struct and try again.
     Info.convertToPacked();
     DecodeStructFields(Field, Info);
-  } else 
+  } 
+  else if (TYPE_USER_ALIGN(TREE_TYPE(Field))
+           && DECL_ALIGN_UNIT(Field) != Info.getTypeAlignment(Ty)
+           && !Info.isPacked()) {
+    // If Field has user defined alignment and it does not match Ty alignment
+    // then convert to a packed struct and try again.
+    Info.convertToPacked();
+    DecodeStructFields(Field, Info);
+  } else
     // At this point, we know that adding the element will happen at the right
     // offset.  Add it.
     Info.addElement(Ty, StartOffsetInBytes, Info.getTypeSize(Ty));


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